CA2077858A1 - Portable ecg monitor/recorder - Google Patents
Portable ecg monitor/recorderInfo
- Publication number
- CA2077858A1 CA2077858A1 CA002077858A CA2077858A CA2077858A1 CA 2077858 A1 CA2077858 A1 CA 2077858A1 CA 002077858 A CA002077858 A CA 002077858A CA 2077858 A CA2077858 A CA 2077858A CA 2077858 A1 CA2077858 A1 CA 2077858A1
- Authority
- CA
- Canada
- Prior art keywords
- user
- memory
- data
- electrodes
- ecg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/332—Portable devices specially adapted therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/333—Recording apparatus specially adapted therefor
- A61B5/335—Recording apparatus specially adapted therefor using integrated circuit memory devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/04—Constructional details of apparatus
- A61B2560/0462—Apparatus with built-in sensors
- A61B2560/0468—Built-in electrodes
Abstract
ABSTRACT OF THE DISCLOSURE
A portable apparatus having electronic circuitry for selectively monitoring and recording a user's ECG signals, wherein a first conductive electrode is disposed on a first surface of the apparatus casing for contact with an ECG lead position on the user's body and second and third electrodes are disposed on at least one other surface of the casing for ease of contact by a thumb and finger, respectively, of the user's hand.
One of the second and third electrodes provides a ground signal source for the electronic circuitry. A wristband is provided for securing the apparatus to the user's wrist and a microprocessor controls the electronic circuitry such that the user's ECG signal is monitored/recorded only when the user grasps the second and third electrodes. A separate modem device is attachable to the apparatus for effecting burst mode transmission of data to an external receiver.
A portable apparatus having electronic circuitry for selectively monitoring and recording a user's ECG signals, wherein a first conductive electrode is disposed on a first surface of the apparatus casing for contact with an ECG lead position on the user's body and second and third electrodes are disposed on at least one other surface of the casing for ease of contact by a thumb and finger, respectively, of the user's hand.
One of the second and third electrodes provides a ground signal source for the electronic circuitry. A wristband is provided for securing the apparatus to the user's wrist and a microprocessor controls the electronic circuitry such that the user's ECG signal is monitored/recorded only when the user grasps the second and third electrodes. A separate modem device is attachable to the apparatus for effecting burst mode transmission of data to an external receiver.
Description
2~778~8 FIELD OF THE Il\JVENTION
The present invention relates to an apparatus ~or monitoring and recording ECG data, and more particularly to a self-contained, portable ECG monitor/recorder.
BACKGROUND OF THE INVENTION
Portable electrocardiogram ~ECG) monitoring and recording devices for use by persons in out-patient (e.g., home or work) environments have long been known. Recently, compact devices have been developed that may be worn or carriad by a user for monitoring and recording ECG data and transmitting the recorded data through a telephone handset to analyzing equipment at a doctor's o~fice or centralized location. These devices each provide certain benefits, but also suffer from various short-comings and daficiencies. These deficiencies relate primarily to either the physical size of the units or to the way in which the user is required to make contact with the electrodes and subsequently activate the recording sequence.
For example, with some of these known devices the user is required to apply the device (particularly its electrodes) to a body portion (e.g., bare chest) as soon as possible a~ter the on-set of episodic symptoms, such as an arrhythmia. Of course, given the practical delays in finding the unit, locating a private place in which to effect the recording, opening or removing a chest-covering shirt or blouse, applying the unit to the chest and pushing the record button, transient episodic symptoms are often missed.
Other devices have attempted to overcome these "missed-event" deficiencies ~y requiring the user to apply two or mor~
paste-on electrodes to their body, which electrodes are wired into the device. The unit is worn attached to the user's clothing and a memory loop feature is employed which allows the user ample time to activate the recording sequence after the on-set o~ episodic symptoms. Since the user actually wears attached electrodes, continuous monitoring is possible `: ~
~7~8~8 and the memory loop ensures that transient ECG data is rarely missed. Patients, however, are generally resistent to wearing either paste-on electrodes or a bulky device attached to their clothing. The paste-on electrodes become uncom~ortable over extended periods of time, and the size and placement of the unit on the outside of clothing draws unwanted attention to the patient's medical condition.
U.S. Patent 4,120,294 ~Wolfe) discloses a wrist-worn device for monitoring electrical heart signals (e.g., heartbeat rate or ECG), but does nc~t include memory for recording such data. Moreover, the Wolfe unit has only two electrodes -- no ground electrode is contemplated -- and, therefore, is highly susceptible to muscle artifact signals which can degrade the quality of ECG data pickup.
Consequently, even if memory was provided, recording of medical-grade ECG data by such a unit would be unlikely.
~ SUMMARY OF THE INVENTION
In view of the foregoing, i$ is a primary object of the present invention to provide an apparatus that records medical-grade ECG data and yet is convenient and ~omfortable for a user to wear.
A related object of the present invention is tc provide a portable EC& recorder which does not utilize paste-on electrodes.
Another object of the present invention is to provide a portable ECG recorder which operates so as to ensure long battery life.
A further object o~ the present invention is to provide a portable ECG recorder and a separate, attachable modem device for transmitting stored data from the recorder to a receiving station.
A related object of the present invention is to provide an ECG recorder which transfers data to a separate modem in burst mode.
Yet another object of the present invention is to provide a portable ECG re.corder having a high common mode rejection ~7~
ratio through use of a three electrode configuration and improved circuit means.
Other objects and advantages of the present invention will become apparent from the following detailed description when taken in conjunction with the dlrawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
FIGURE lA is a perspective view of a portable ECG
monitor/recorder exemplified by the present invention;
FIG. lB is a top view of the ECG monitor/recorder of FIG. lA, FIG. lC is a bottom view of the ECG monitor/recorder of FIG. lA;
FIG. 2 is a circuit diagram of a portable ECG
monitor/recorder exemplified by the present invention;
FIG. 3 i~ a flow chart representation of a preferred sequence of operations followed by the microprocessor of the inventive ECG monitor/recorder of FIG. 2;
FIG. 4 is a circuit diagram of a data-converting modem for use in conjunction with the ECG monitor/recorder of FIG. 2; and FIG. 5 is a flow chart representation of a preferred sequence of operations followed by the modem of FIG. 4.
While the invention will be described în connection with certain preferred embodiments, there is no intent to limit it to thoss embodiments. On the contrary, the intent is to cover all alternatives, modifications and equivalents included within the spirit and scope of the invention as defined by the appended claims.
DETAILED DE:SCRIPTION OF THE PREFERRED EMBODIMENTS
Turning now t;o the drawings, and referring first to FIG. lA, there is shown a portable ECG monitor/recorder 10 which is adapted t:o be worn on the wrist of a user. This unit includes a casing 11 which houses the electronic circuitry and a wristband 12 for securing the casing to the userls wrist.
~77~
The casing 11 includes surface-mounted electrodes which the us~-r contacts to obtain a conventional Lead I ECG measurement (i.e., differentially acro~s the user's arms), control buttons, an output port ~or couplinq the unit to a modem device, and an LCD display for visuially providing in~ormation to the user.
As shown in FIGS. lA-lC, a first conductive electrode 15a is provided on the bottom surface of the casing 11, where it is held in constant contact with th~e user's wrist when the unit is worn. Another pair of conductive electrodes 15b, 15c are provided on opposing side sur~aces of the casing 11, where they can ba ~asily contacted by the thumb and forefinger, respectively, of the user's right hand (assuming the unit is being worn on the left wrist). By grasping this pair of electrodes 15b, 15c, the user completes the Lead I circuit and activates the internal electronic circuitry, as will be described in further detail hereinafter, such that recording of the ECG data commences.
All three electrodes are made of a suitable conducting material, preferably silver or silver chloride, and to reduce undesirable electrode-skin artifact "noiss" signals arising from contact variations, at least the side electrodes 15b, 15c are substantially circular or oval, as opposed to square or rectangular, are small enough in size to be covered completely by the user's finger and/or thumb, and have a curved, as opposed to flat, surface geometry. To enhance the electrical contact between the f irst electrode 15a and the user's wrist, the user typically prepares the skin contact area by applying an appropriata contact cream or gel (or even water or saliva) before securing the unit to the wrist.
The unit further includes a pair of push-buttons 16, 17 on its top surfacle, one of which is used to clear the unit's memory and the other being used to transmit data stored in the memory to a separ,ate modem device via serial output port 18.
An LCD display 19 is also provided on the top surface of the casing. This display visually provides information to the user, preferably including an indicator 20 of the time of day, an indicator 21 of the number of cardiac events (e.g., c~7~8~
arrhythmias~ recorded, and a bar graph 22 which indicates the portion of the total memory that is filled with data~
While the inventive ECG monitor/recorder will preferably be used in an embodiment having a wristband for securing the casing to the user's wrist las shown in FIG. lA~, it will be readily appreciated that the unit is easily adapted so that it can be worn by the user as a pendant. Specifically, rather than having a wristband 12, the casing 11 is provided with a pair of integral eyelets 23 (shown in phantom in FIG. lB) for attachment to a cord or chain so that the unit can be hung around the user's nack. As such, the first electrode 15a is disposed to facilitate electrical contact with an ECG lead position on the user's chest, and the other two electrodes 15b, 15c can still be easily grasped by the user at the on-set of a cardiac event.
FIG. 2 illustrates the electronic components and circuitry contained in the casing 12 of the portable EcG
monitor/recorder. As shown, two of the conductive electrodes lSa, 15c are coupled to the non-inverting and inverting inputs of an amplifier 25, and the third conductive electrode 15b provides an analog ground signal (AGND) to various electronic components. A first pair of resistors 26, 27 (preferably 22Mn each) are respectively interposed between the two "hot"
electrodes 15a, 15c and ground and provide the circuit with a high input impedance. The second pair of resistors 28, 29 (preferably lMn each) are positioned between the electrodes and the inputs of the amplifier 25 and provide a simple patient protection/electrostatic discharge ~ESD) network which protects the electronic circuitry from static discharge from the user and limits the maximum battery current applied to the user to approximately 2 microamps.
Upon contact of the conductive electrodes by the user, a touch signal (TCH) is generated and a differential ~CG signal is applied to the inputs of the amplifier 2S. The touch signal is applied to the invsrting input of a comparator 30, which serves as a touch sensor. A divider network consisting of two resistors 31, 32 provides current from the pawer supply (Vcc) -- preferably consisting of two 3V lithium coin cell ~77~
batteries wired in parallel -- to the non-inverting input of the comparator 30. since the inverting input is normally low, the output of the comparator is normally high (i.e., logic one). When the user contacts the e]ectrodes, however, and the touch signal (TCH) is generated, the inverting input goes high and causes the output of the comparator 30 to go to logic zero. The signal from the comparator 30 is applied to an input of a microprocessor 33, which, when the touch sensor signal is low, provides a "power on" signal to the other circuit components. Thus, the electronic circuit components are only activated when the user grasps the conductive electrodes 15a-15c.
In the preferred embodiment the touch sensor consists of the depicted comparator 30 and divider network 31, 32, but it will be readily appreciated that other devices, such as a depletion-type MOSFET, can be effectively used as the touch sensor. For example, if a depletion-type MOSFET is used, the touch signal (TCH) is applied to the gate terminal, the source terminal is coupled to ground and the drain terminal is coupled to the microprocessor 33, whereby a logic zero signal is provided to the microprocessor when the user contacts the electrodes 15a-15c.
The "power on" signal ~having a logic zero value) provided by the microprocessor 33 is applied to the ba~e terminals of a pair of pnp type transistors 3~, 35. These transistors are normally biased to an OFF condition due to the connection of the power supply V~ to their base terminals, but application of the logic zero "power on" signal to their bases turns them ON. This enables various electronic components in the signal processing circuitry.
As indicated previously, when a user contacts the electrodes, an analog ECG signal is applied to the inputs of the amplifier 25 l~which, for example, may be implemented using a standard TLC251C operational amplifier). In accordance with an important aspect of the present invention, the output of this amplifier is not fed back to one of its inputs, but rather, is coupled through a resistor 36 to one of its compensating term:inals (offset null pin 5 -- not shown). As a ~77~
result of this arrangement, the gain of the ampli*ier is not controlled by feedback and a high common mode rejection ratio is achieved. The resistor 36 serves as a gain control. This amplifier arrangement also permits overall simplification of the circuitry, since only one additional amplifier is needed to get satisfactory performance. As will be appreciated, this significantly reduces the power consumption and spatial requirements of the circuit.
The output of amplifier 25 is ;lpplied to a second amplifier 37, which is configured in a typical feedback arrangement to provide a desired gain (for example, 4). The output of amplifier 37 is delivered to a standard monitor quality bandpass filter 38, consisting of a 40 Hz lowpass filter ~hich eliminates some muscle artifact and 60 Hz interference, followed by a O.5 Hz multiple feedback lowpass filter which minimizes baseline wander. Finally, the signal is digitized by an 8-bit analog-to-digital converter (A/D) 39 and is applied via data line 40 to the microprocessor 33.
A dri~er circuit 41, consisting of an amplifier 42, three resistors 43-45, and a capacitor 46, provide the amplifiers 25, 37 and filter circuit 38 with an analog ground (AGND) signal. This signal is normally held at V~ (3V) by the RC
circuit consisting of resistor 45 and capacitor 46. When the user contacts the conductive electrode 15b, however, AGND is set to a value of V~/2 by the amplifier 42 and the divider network provided by resistors 43, 44.
During times when the user is contacting the electrodes 15a-15c and a logic zero interrupt signal is provided to the microprocessor 33 by the touch sensor 30, the microprocessor receives EC~ data from the 8-bit A/D converter 3g and stores it in se~uential memory address locations in a digital memory device 50. This memory device preferably consists of a 32K x 8 static random access memory (SRAM), but it will be readily appreciated that the memory device could satisfactorily consist of a flash-EPROM or any read/write memory circuit configured as a first in/first out (FIFO) ring memory. The microprocessor 33 (which, for example, may consist of a Signetics 83CL410HFT processor) samples digitized s~77~
data from the A/D converter 30 every 8 millisecondæ and, therefore, assuming the memory device 50 is a 32K x 8 SRAM, about four minutes of data can be stored.
The microprocessor operates in a playback (or transmit) mode when it receives a logic zero l"transmit" signal (XMIT), which is generated when the user de]presses the control button 16. In this playback mode, the microprocessor sequentially fetches the digitized ECG data from the digital memory device 50 and sends it to the serial port 18 in burst mode via a communication channel 51.
If the user depresses the second control button 17, a logic zero "memory clear" signal (MEM CLR) is provided to the microprocessor. If this signal is received simultaneously with depression of the "transmit" control button 16 by the user, the microprocessor instantaneously clears the digital memory 50 by resetting an internal write pointer to the starting base address of the memory. As will ~e appraciated, making the "memory clear" button 17 a slave to the "transmit"
button 16 protects against accidental or inadvertent erasure of data.
Finally, the microprocessor also generates the information and provides the drive signals for the LCD display 19. These functions are executed under instructions from standard built-in firm~are (not shown) in the microprocessor's internal memory.
The sequence of operations followed by the microprocessor 33 in the inventive EC~ monitor/recorder is illustrated in further detail by the flow chart of FIG. 3. Specifically, this flow chart illustrates the record, transmit and memory clear modes of operation. When batteries arQ put in the device (step 100), the microprocessor setæ its power control bit to a "power offl', i.e., logic one, condition (step 101) and initializes the circuit components (step 102). This initialization includes setting both the read pointer and write pointer of the memory device ~0 to a starting base ~o) address, initializing the communication channel 51 to a master transmitter mode and initializing the port pins to minimize power consumption. After this is done, the microprocessor 2~7)~8~
goes into a low power sleep mode ~step 103), in which it waits for an interrupt signal and holds the circuit components in a non-enabled condition.
In sampling for interrupt signals, at step 104 the microprocessor determines the logic condition of the output signal of the touch sensor 30. If it is low, indicating that the user is contacting the electrodes 15a-15c, the microprocessor enables the circuit components by setting the power control bit to a "power on" (logic zero) condition (step 105). ~he user's analog ECG signal is then digitized, as discussed previously, and provided to the microprocessor on data line 40. Meanwhile, the microprocessor initiates an 8 millisecond sampling cycle (steps 106 and 107), whereby it reads the digitized output of the A/D converter 39 after 8 milliseconds have elapsed (step 108~.
Next, the microprocessor increments a battery li~e control (step lO9), which control is indicative of the remaining active li~e of the batteries. This control is used to adjust either the height or width of a break pulse (step 110) and the adjusted break pulse is written to both the memory device 50 and the communication channel ~1 in real time (step 111). The break pulse is stored to indicate the beginning of a data sequence (or recording session~, and also as an indicator of remaining battery life. When the batteries are new, the square wave break pulse has, for example, a three millivolt amplitude and an 80-lVO millisecond duration. If the break pulse magnitude falls below one millivolt, or if the break pulse duration falls below about 25 milliseconds, a trained physician analyzing the data sequence will recoqnize that the remaining battery life is short and can alert the user to change the batteries. As a calibration feature, it may be desirable to have the microprocessor generate and store a 1 millivolt square wave pulse in conjunction with generating and storing the break pulse.
Once the break pulse has been stored in memory, the microprocessor sequentially writes the digitized ECG data to both the memory device 50 and the communication channel 51 in real time mode (step 112).
As long as the user contacts the conductive electrodes 15a-15c, the touch sensor output remains low and the microprocessor continues this 8 millisecond data sampling and storing cycle, except that a break ]pulse is generated only at the beginning of the new data sequence.
If, at step 104, it is determined that the user is not contacting any conductive electrodes, the microprocessor sets the power control bit to a "power off" (logic one) condition (step 1133 and checks the logic condition of the "transmit"
signal (step 114). When the "transmit" signal ~XMIT) is low, indicating that the user has depressed control button 16 and desires to transmit the stored ECG data to an external receiver, the microprocessor enables only the circuitry of the communication channel 51. Next, at step 115, it is determined whether the address of the write pointer in the memory is greater than the address of the read pointer, and if it is, the contents of the memory at the read pointer address are read (step 116) and written to the communication channel 51 in burst mode (step 117). By transmitting in burst mode, four minutes of data can be sent out of the serial port in less than ten seconds. It will be appreciated, therefore, that power consumption during transmission of data is kept to a minimum, which effectively doubles the battery life. This is significant inasmuch as the batteries are difficult to change and typically cannot be changPd by the user.
Once data at the read pointer address has been written to the communication channel, the read pointer is incremented (step 118) and the read/write cycle is continued until all o~
the data has been transmitted. As noted before, this entir~
data transmission procedure required less than ten seconds when the memory is full.
If it is determined at step 114 that the user does not desire data transmission, the microprocessor determines whether the "memory clear" signal (MEM CLR) is low (i.e., whether the user desires to clear the memory) (step 119). If not, the control sequence cycles back to step 104 and repeats.
However, if a logic zero "memory clear" signal is received, and it is determined that the transmit control button 16 is 2~7~
being simultaneously depressed (step 120), both the internal read pointer and write pointer are set to the starting base address (O), thus, effectively clearing the memory ~step 121)~
In accordance with another important aspect of the present invention, a separate modem device is provided which is adapted for electrical connection to the ECG
monitorlrecorder 10 and includes components for receiving the digitized ECG data stored in the recorder's memory 50, processing that data into a format which can be transmitted for analysis to an external receiver, and transmitting the processed data to the external receiver. The circuit diagram of FIG. 4 illustrates the components of this modem, which is designated generally by reference numeral 200. An input jack 201 is adapted to mate with the output serial port 18 of the recorder 10 so that data transfer can be effected. The digitized ECG data from the recorder memory 50 is converted into analog signals having discrete voltage levels by a standard digital-to-analog converter (D/A) 202. Every 8 milliseconds, this D/A converter converts a data byte to a discrete voltage level. This voltage level is applied to a buffer 203 and an anti-aliasing 40 Hz lowpas~ filter 204 that smooths the voltage waveform ~ack to its original analog shape.
In a preferred embodiment, the modem 200 includes a microprocessor 205 (for example, a Signetics 83CL410 processor) and a digital memory 206 (which is preferably an SRAM or an EPROM). A power source consisting of a common nine volt alkaline battery is coupled to the microprocessor through a switch 207, b~ means of which the user can turn the microprocessor (and, thus, the modem itself) on and off. ~n LED 208 provides a visual indicator to the user that the microprocessor 205 is being powered.
Tha microprocessor receives serial data from the recorder 10 via the serial input jack 201. This serial data is converted to 8-bit parallel (byte-wide) information by internal serial channel hardware, which data byte is then an exact copy of the sampled ECG data acquired by the recorder 10. The microprocessor 20S then stores the ECG data byte in 2 ~
the SRAM memory 206, and loops back to receive the next byte from the internal serial channel hardware.
Every 8 milliseconds, an internal timer generates an interrupt signal that directs the microprocessor 205 to fetch the next sequential byte of ECG data from the SRAN memory 206 and send it to the D/A converter 202. ~ecause the DIA
converter 202 can only reconstruct the sampled ECG waveforms at a rate of 1 byte every 8 milliseconds, burst mode transmission of data from the recorder 10 to the modem 200 would be impossible without the microprocessor 205 and the SRAM memory 206. The SRAM memory is used as an ECG data buffer, so that the recorder-to-modem data transmission can occur at a higher speed than the real-time playback of the modem, without inter-device synchronization problems.
The analog output of the filter 204 is fed to a voltage controlled oscillator (VC0) 209 that has a center frequency of 1900 Hz. The VC0 209 is calibrated such that its frequency d~viates lO0 Hz from its center frequency for every one millivolt change in the analog ECG waveform.
The output of the VCO 209 is coupled to a speaker 210, by means of which frequency modulated tones are audibly transmitted. An external receiver 211, such as an ECG monitor in a physician's office, may receive the frequency modulated tones from the speaker 210 via an appropriate audio receiver 212 (e.g., a telephone receiver). The received audio signals are then provided to processing circuitry 213 in the receiver 211 via a switching mechanism 214.
In a preferred emhodiment, the modem 200 further includes a unity gain buffer 215 and an amplifier circuit (generally designated by reference numeral 216) which produces an output signal haviny an amplitude of 1 volt per millivolt amplitude in the analog ECG waveform received from the filter 204. This output signal is provided to an output jack 217 which may be coupled to a corresponding input jack 218 on the receiver 211 for effecting data transfer.
The sequence of operations followed by the microprocessor 205 in the modem 200 is illustrated in further detail by the flowchart of FIG. 5. When the switch 207 is closed and the ~7$~
microprocessor is turned on (step 300), the microprocessor sets both the read pointer and write pointer oî the memory device 206 to a starting base (0) address (step 301), initializes the communication channlel to a slave receiver mode and initializes the D/A converter 202 (step 302). The modem then awaits for an interrupt signal (stsp 303). If an interrupt signal is received from the communication channel (step 304), an ECG data byte is written to the memory 206 (step 305) and the internal write pointer in the memory is incremented (step 306). This loop continues until the entire data sequence from the recorder is received and written to the memory 206 in the modem.
With respect to transmission of the data stored in the memory 206, when an 8 millisecond interrupt signal is received at step 307 and it is determined that the address of the internal write pointer is greater than the address of the internal read pointer (step 308~, the sequential byte of ECG
data stored at the read pointer address of the memory 206 is read (step 309). This byte of data is then sent to the D/A
converter 202 for processing (step 310) and the internal read pointer is incremented (step 311). This loop is continued, with 8 millisecond sampling, until all of the data stored in memory 206 has been processed (i.e., until the read pointer address is the same as the write pointer address).
As can be seen from the foregoing detailed description, the present invention provides an improved apparatus for recording medical-grade ECG data and yet which is convenient and comfortable for a user to wear. This apparatus does not utilize paste-on electrodes. The inventive recorder has a high common mode rejection ratio due to the use of a three electrode configuration and a unique amplifier arrangement, and the design of the processing circuits insures long battery life. A separate, attachable modem device is provided for transmitting stored data from the recorder to a receiving station, this modem enabling transfer of data îrom the recorder in power-saving burst mode.
The present invention relates to an apparatus ~or monitoring and recording ECG data, and more particularly to a self-contained, portable ECG monitor/recorder.
BACKGROUND OF THE INVENTION
Portable electrocardiogram ~ECG) monitoring and recording devices for use by persons in out-patient (e.g., home or work) environments have long been known. Recently, compact devices have been developed that may be worn or carriad by a user for monitoring and recording ECG data and transmitting the recorded data through a telephone handset to analyzing equipment at a doctor's o~fice or centralized location. These devices each provide certain benefits, but also suffer from various short-comings and daficiencies. These deficiencies relate primarily to either the physical size of the units or to the way in which the user is required to make contact with the electrodes and subsequently activate the recording sequence.
For example, with some of these known devices the user is required to apply the device (particularly its electrodes) to a body portion (e.g., bare chest) as soon as possible a~ter the on-set of episodic symptoms, such as an arrhythmia. Of course, given the practical delays in finding the unit, locating a private place in which to effect the recording, opening or removing a chest-covering shirt or blouse, applying the unit to the chest and pushing the record button, transient episodic symptoms are often missed.
Other devices have attempted to overcome these "missed-event" deficiencies ~y requiring the user to apply two or mor~
paste-on electrodes to their body, which electrodes are wired into the device. The unit is worn attached to the user's clothing and a memory loop feature is employed which allows the user ample time to activate the recording sequence after the on-set o~ episodic symptoms. Since the user actually wears attached electrodes, continuous monitoring is possible `: ~
~7~8~8 and the memory loop ensures that transient ECG data is rarely missed. Patients, however, are generally resistent to wearing either paste-on electrodes or a bulky device attached to their clothing. The paste-on electrodes become uncom~ortable over extended periods of time, and the size and placement of the unit on the outside of clothing draws unwanted attention to the patient's medical condition.
U.S. Patent 4,120,294 ~Wolfe) discloses a wrist-worn device for monitoring electrical heart signals (e.g., heartbeat rate or ECG), but does nc~t include memory for recording such data. Moreover, the Wolfe unit has only two electrodes -- no ground electrode is contemplated -- and, therefore, is highly susceptible to muscle artifact signals which can degrade the quality of ECG data pickup.
Consequently, even if memory was provided, recording of medical-grade ECG data by such a unit would be unlikely.
~ SUMMARY OF THE INVENTION
In view of the foregoing, i$ is a primary object of the present invention to provide an apparatus that records medical-grade ECG data and yet is convenient and ~omfortable for a user to wear.
A related object of the present invention is tc provide a portable EC& recorder which does not utilize paste-on electrodes.
Another object of the present invention is to provide a portable ECG recorder which operates so as to ensure long battery life.
A further object o~ the present invention is to provide a portable ECG recorder and a separate, attachable modem device for transmitting stored data from the recorder to a receiving station.
A related object of the present invention is to provide an ECG recorder which transfers data to a separate modem in burst mode.
Yet another object of the present invention is to provide a portable ECG re.corder having a high common mode rejection ~7~
ratio through use of a three electrode configuration and improved circuit means.
Other objects and advantages of the present invention will become apparent from the following detailed description when taken in conjunction with the dlrawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
FIGURE lA is a perspective view of a portable ECG
monitor/recorder exemplified by the present invention;
FIG. lB is a top view of the ECG monitor/recorder of FIG. lA, FIG. lC is a bottom view of the ECG monitor/recorder of FIG. lA;
FIG. 2 is a circuit diagram of a portable ECG
monitor/recorder exemplified by the present invention;
FIG. 3 i~ a flow chart representation of a preferred sequence of operations followed by the microprocessor of the inventive ECG monitor/recorder of FIG. 2;
FIG. 4 is a circuit diagram of a data-converting modem for use in conjunction with the ECG monitor/recorder of FIG. 2; and FIG. 5 is a flow chart representation of a preferred sequence of operations followed by the modem of FIG. 4.
While the invention will be described în connection with certain preferred embodiments, there is no intent to limit it to thoss embodiments. On the contrary, the intent is to cover all alternatives, modifications and equivalents included within the spirit and scope of the invention as defined by the appended claims.
DETAILED DE:SCRIPTION OF THE PREFERRED EMBODIMENTS
Turning now t;o the drawings, and referring first to FIG. lA, there is shown a portable ECG monitor/recorder 10 which is adapted t:o be worn on the wrist of a user. This unit includes a casing 11 which houses the electronic circuitry and a wristband 12 for securing the casing to the userls wrist.
~77~
The casing 11 includes surface-mounted electrodes which the us~-r contacts to obtain a conventional Lead I ECG measurement (i.e., differentially acro~s the user's arms), control buttons, an output port ~or couplinq the unit to a modem device, and an LCD display for visuially providing in~ormation to the user.
As shown in FIGS. lA-lC, a first conductive electrode 15a is provided on the bottom surface of the casing 11, where it is held in constant contact with th~e user's wrist when the unit is worn. Another pair of conductive electrodes 15b, 15c are provided on opposing side sur~aces of the casing 11, where they can ba ~asily contacted by the thumb and forefinger, respectively, of the user's right hand (assuming the unit is being worn on the left wrist). By grasping this pair of electrodes 15b, 15c, the user completes the Lead I circuit and activates the internal electronic circuitry, as will be described in further detail hereinafter, such that recording of the ECG data commences.
All three electrodes are made of a suitable conducting material, preferably silver or silver chloride, and to reduce undesirable electrode-skin artifact "noiss" signals arising from contact variations, at least the side electrodes 15b, 15c are substantially circular or oval, as opposed to square or rectangular, are small enough in size to be covered completely by the user's finger and/or thumb, and have a curved, as opposed to flat, surface geometry. To enhance the electrical contact between the f irst electrode 15a and the user's wrist, the user typically prepares the skin contact area by applying an appropriata contact cream or gel (or even water or saliva) before securing the unit to the wrist.
The unit further includes a pair of push-buttons 16, 17 on its top surfacle, one of which is used to clear the unit's memory and the other being used to transmit data stored in the memory to a separ,ate modem device via serial output port 18.
An LCD display 19 is also provided on the top surface of the casing. This display visually provides information to the user, preferably including an indicator 20 of the time of day, an indicator 21 of the number of cardiac events (e.g., c~7~8~
arrhythmias~ recorded, and a bar graph 22 which indicates the portion of the total memory that is filled with data~
While the inventive ECG monitor/recorder will preferably be used in an embodiment having a wristband for securing the casing to the user's wrist las shown in FIG. lA~, it will be readily appreciated that the unit is easily adapted so that it can be worn by the user as a pendant. Specifically, rather than having a wristband 12, the casing 11 is provided with a pair of integral eyelets 23 (shown in phantom in FIG. lB) for attachment to a cord or chain so that the unit can be hung around the user's nack. As such, the first electrode 15a is disposed to facilitate electrical contact with an ECG lead position on the user's chest, and the other two electrodes 15b, 15c can still be easily grasped by the user at the on-set of a cardiac event.
FIG. 2 illustrates the electronic components and circuitry contained in the casing 12 of the portable EcG
monitor/recorder. As shown, two of the conductive electrodes lSa, 15c are coupled to the non-inverting and inverting inputs of an amplifier 25, and the third conductive electrode 15b provides an analog ground signal (AGND) to various electronic components. A first pair of resistors 26, 27 (preferably 22Mn each) are respectively interposed between the two "hot"
electrodes 15a, 15c and ground and provide the circuit with a high input impedance. The second pair of resistors 28, 29 (preferably lMn each) are positioned between the electrodes and the inputs of the amplifier 25 and provide a simple patient protection/electrostatic discharge ~ESD) network which protects the electronic circuitry from static discharge from the user and limits the maximum battery current applied to the user to approximately 2 microamps.
Upon contact of the conductive electrodes by the user, a touch signal (TCH) is generated and a differential ~CG signal is applied to the inputs of the amplifier 2S. The touch signal is applied to the invsrting input of a comparator 30, which serves as a touch sensor. A divider network consisting of two resistors 31, 32 provides current from the pawer supply (Vcc) -- preferably consisting of two 3V lithium coin cell ~77~
batteries wired in parallel -- to the non-inverting input of the comparator 30. since the inverting input is normally low, the output of the comparator is normally high (i.e., logic one). When the user contacts the e]ectrodes, however, and the touch signal (TCH) is generated, the inverting input goes high and causes the output of the comparator 30 to go to logic zero. The signal from the comparator 30 is applied to an input of a microprocessor 33, which, when the touch sensor signal is low, provides a "power on" signal to the other circuit components. Thus, the electronic circuit components are only activated when the user grasps the conductive electrodes 15a-15c.
In the preferred embodiment the touch sensor consists of the depicted comparator 30 and divider network 31, 32, but it will be readily appreciated that other devices, such as a depletion-type MOSFET, can be effectively used as the touch sensor. For example, if a depletion-type MOSFET is used, the touch signal (TCH) is applied to the gate terminal, the source terminal is coupled to ground and the drain terminal is coupled to the microprocessor 33, whereby a logic zero signal is provided to the microprocessor when the user contacts the electrodes 15a-15c.
The "power on" signal ~having a logic zero value) provided by the microprocessor 33 is applied to the ba~e terminals of a pair of pnp type transistors 3~, 35. These transistors are normally biased to an OFF condition due to the connection of the power supply V~ to their base terminals, but application of the logic zero "power on" signal to their bases turns them ON. This enables various electronic components in the signal processing circuitry.
As indicated previously, when a user contacts the electrodes, an analog ECG signal is applied to the inputs of the amplifier 25 l~which, for example, may be implemented using a standard TLC251C operational amplifier). In accordance with an important aspect of the present invention, the output of this amplifier is not fed back to one of its inputs, but rather, is coupled through a resistor 36 to one of its compensating term:inals (offset null pin 5 -- not shown). As a ~77~
result of this arrangement, the gain of the ampli*ier is not controlled by feedback and a high common mode rejection ratio is achieved. The resistor 36 serves as a gain control. This amplifier arrangement also permits overall simplification of the circuitry, since only one additional amplifier is needed to get satisfactory performance. As will be appreciated, this significantly reduces the power consumption and spatial requirements of the circuit.
The output of amplifier 25 is ;lpplied to a second amplifier 37, which is configured in a typical feedback arrangement to provide a desired gain (for example, 4). The output of amplifier 37 is delivered to a standard monitor quality bandpass filter 38, consisting of a 40 Hz lowpass filter ~hich eliminates some muscle artifact and 60 Hz interference, followed by a O.5 Hz multiple feedback lowpass filter which minimizes baseline wander. Finally, the signal is digitized by an 8-bit analog-to-digital converter (A/D) 39 and is applied via data line 40 to the microprocessor 33.
A dri~er circuit 41, consisting of an amplifier 42, three resistors 43-45, and a capacitor 46, provide the amplifiers 25, 37 and filter circuit 38 with an analog ground (AGND) signal. This signal is normally held at V~ (3V) by the RC
circuit consisting of resistor 45 and capacitor 46. When the user contacts the conductive electrode 15b, however, AGND is set to a value of V~/2 by the amplifier 42 and the divider network provided by resistors 43, 44.
During times when the user is contacting the electrodes 15a-15c and a logic zero interrupt signal is provided to the microprocessor 33 by the touch sensor 30, the microprocessor receives EC~ data from the 8-bit A/D converter 3g and stores it in se~uential memory address locations in a digital memory device 50. This memory device preferably consists of a 32K x 8 static random access memory (SRAM), but it will be readily appreciated that the memory device could satisfactorily consist of a flash-EPROM or any read/write memory circuit configured as a first in/first out (FIFO) ring memory. The microprocessor 33 (which, for example, may consist of a Signetics 83CL410HFT processor) samples digitized s~77~
data from the A/D converter 30 every 8 millisecondæ and, therefore, assuming the memory device 50 is a 32K x 8 SRAM, about four minutes of data can be stored.
The microprocessor operates in a playback (or transmit) mode when it receives a logic zero l"transmit" signal (XMIT), which is generated when the user de]presses the control button 16. In this playback mode, the microprocessor sequentially fetches the digitized ECG data from the digital memory device 50 and sends it to the serial port 18 in burst mode via a communication channel 51.
If the user depresses the second control button 17, a logic zero "memory clear" signal (MEM CLR) is provided to the microprocessor. If this signal is received simultaneously with depression of the "transmit" control button 16 by the user, the microprocessor instantaneously clears the digital memory 50 by resetting an internal write pointer to the starting base address of the memory. As will ~e appraciated, making the "memory clear" button 17 a slave to the "transmit"
button 16 protects against accidental or inadvertent erasure of data.
Finally, the microprocessor also generates the information and provides the drive signals for the LCD display 19. These functions are executed under instructions from standard built-in firm~are (not shown) in the microprocessor's internal memory.
The sequence of operations followed by the microprocessor 33 in the inventive EC~ monitor/recorder is illustrated in further detail by the flow chart of FIG. 3. Specifically, this flow chart illustrates the record, transmit and memory clear modes of operation. When batteries arQ put in the device (step 100), the microprocessor setæ its power control bit to a "power offl', i.e., logic one, condition (step 101) and initializes the circuit components (step 102). This initialization includes setting both the read pointer and write pointer of the memory device ~0 to a starting base ~o) address, initializing the communication channel 51 to a master transmitter mode and initializing the port pins to minimize power consumption. After this is done, the microprocessor 2~7)~8~
goes into a low power sleep mode ~step 103), in which it waits for an interrupt signal and holds the circuit components in a non-enabled condition.
In sampling for interrupt signals, at step 104 the microprocessor determines the logic condition of the output signal of the touch sensor 30. If it is low, indicating that the user is contacting the electrodes 15a-15c, the microprocessor enables the circuit components by setting the power control bit to a "power on" (logic zero) condition (step 105). ~he user's analog ECG signal is then digitized, as discussed previously, and provided to the microprocessor on data line 40. Meanwhile, the microprocessor initiates an 8 millisecond sampling cycle (steps 106 and 107), whereby it reads the digitized output of the A/D converter 39 after 8 milliseconds have elapsed (step 108~.
Next, the microprocessor increments a battery li~e control (step lO9), which control is indicative of the remaining active li~e of the batteries. This control is used to adjust either the height or width of a break pulse (step 110) and the adjusted break pulse is written to both the memory device 50 and the communication channel ~1 in real time (step 111). The break pulse is stored to indicate the beginning of a data sequence (or recording session~, and also as an indicator of remaining battery life. When the batteries are new, the square wave break pulse has, for example, a three millivolt amplitude and an 80-lVO millisecond duration. If the break pulse magnitude falls below one millivolt, or if the break pulse duration falls below about 25 milliseconds, a trained physician analyzing the data sequence will recoqnize that the remaining battery life is short and can alert the user to change the batteries. As a calibration feature, it may be desirable to have the microprocessor generate and store a 1 millivolt square wave pulse in conjunction with generating and storing the break pulse.
Once the break pulse has been stored in memory, the microprocessor sequentially writes the digitized ECG data to both the memory device 50 and the communication channel 51 in real time mode (step 112).
As long as the user contacts the conductive electrodes 15a-15c, the touch sensor output remains low and the microprocessor continues this 8 millisecond data sampling and storing cycle, except that a break ]pulse is generated only at the beginning of the new data sequence.
If, at step 104, it is determined that the user is not contacting any conductive electrodes, the microprocessor sets the power control bit to a "power off" (logic one) condition (step 1133 and checks the logic condition of the "transmit"
signal (step 114). When the "transmit" signal ~XMIT) is low, indicating that the user has depressed control button 16 and desires to transmit the stored ECG data to an external receiver, the microprocessor enables only the circuitry of the communication channel 51. Next, at step 115, it is determined whether the address of the write pointer in the memory is greater than the address of the read pointer, and if it is, the contents of the memory at the read pointer address are read (step 116) and written to the communication channel 51 in burst mode (step 117). By transmitting in burst mode, four minutes of data can be sent out of the serial port in less than ten seconds. It will be appreciated, therefore, that power consumption during transmission of data is kept to a minimum, which effectively doubles the battery life. This is significant inasmuch as the batteries are difficult to change and typically cannot be changPd by the user.
Once data at the read pointer address has been written to the communication channel, the read pointer is incremented (step 118) and the read/write cycle is continued until all o~
the data has been transmitted. As noted before, this entir~
data transmission procedure required less than ten seconds when the memory is full.
If it is determined at step 114 that the user does not desire data transmission, the microprocessor determines whether the "memory clear" signal (MEM CLR) is low (i.e., whether the user desires to clear the memory) (step 119). If not, the control sequence cycles back to step 104 and repeats.
However, if a logic zero "memory clear" signal is received, and it is determined that the transmit control button 16 is 2~7~
being simultaneously depressed (step 120), both the internal read pointer and write pointer are set to the starting base address (O), thus, effectively clearing the memory ~step 121)~
In accordance with another important aspect of the present invention, a separate modem device is provided which is adapted for electrical connection to the ECG
monitorlrecorder 10 and includes components for receiving the digitized ECG data stored in the recorder's memory 50, processing that data into a format which can be transmitted for analysis to an external receiver, and transmitting the processed data to the external receiver. The circuit diagram of FIG. 4 illustrates the components of this modem, which is designated generally by reference numeral 200. An input jack 201 is adapted to mate with the output serial port 18 of the recorder 10 so that data transfer can be effected. The digitized ECG data from the recorder memory 50 is converted into analog signals having discrete voltage levels by a standard digital-to-analog converter (D/A) 202. Every 8 milliseconds, this D/A converter converts a data byte to a discrete voltage level. This voltage level is applied to a buffer 203 and an anti-aliasing 40 Hz lowpas~ filter 204 that smooths the voltage waveform ~ack to its original analog shape.
In a preferred embodiment, the modem 200 includes a microprocessor 205 (for example, a Signetics 83CL410 processor) and a digital memory 206 (which is preferably an SRAM or an EPROM). A power source consisting of a common nine volt alkaline battery is coupled to the microprocessor through a switch 207, b~ means of which the user can turn the microprocessor (and, thus, the modem itself) on and off. ~n LED 208 provides a visual indicator to the user that the microprocessor 205 is being powered.
Tha microprocessor receives serial data from the recorder 10 via the serial input jack 201. This serial data is converted to 8-bit parallel (byte-wide) information by internal serial channel hardware, which data byte is then an exact copy of the sampled ECG data acquired by the recorder 10. The microprocessor 20S then stores the ECG data byte in 2 ~
the SRAM memory 206, and loops back to receive the next byte from the internal serial channel hardware.
Every 8 milliseconds, an internal timer generates an interrupt signal that directs the microprocessor 205 to fetch the next sequential byte of ECG data from the SRAN memory 206 and send it to the D/A converter 202. ~ecause the DIA
converter 202 can only reconstruct the sampled ECG waveforms at a rate of 1 byte every 8 milliseconds, burst mode transmission of data from the recorder 10 to the modem 200 would be impossible without the microprocessor 205 and the SRAM memory 206. The SRAM memory is used as an ECG data buffer, so that the recorder-to-modem data transmission can occur at a higher speed than the real-time playback of the modem, without inter-device synchronization problems.
The analog output of the filter 204 is fed to a voltage controlled oscillator (VC0) 209 that has a center frequency of 1900 Hz. The VC0 209 is calibrated such that its frequency d~viates lO0 Hz from its center frequency for every one millivolt change in the analog ECG waveform.
The output of the VCO 209 is coupled to a speaker 210, by means of which frequency modulated tones are audibly transmitted. An external receiver 211, such as an ECG monitor in a physician's office, may receive the frequency modulated tones from the speaker 210 via an appropriate audio receiver 212 (e.g., a telephone receiver). The received audio signals are then provided to processing circuitry 213 in the receiver 211 via a switching mechanism 214.
In a preferred emhodiment, the modem 200 further includes a unity gain buffer 215 and an amplifier circuit (generally designated by reference numeral 216) which produces an output signal haviny an amplitude of 1 volt per millivolt amplitude in the analog ECG waveform received from the filter 204. This output signal is provided to an output jack 217 which may be coupled to a corresponding input jack 218 on the receiver 211 for effecting data transfer.
The sequence of operations followed by the microprocessor 205 in the modem 200 is illustrated in further detail by the flowchart of FIG. 5. When the switch 207 is closed and the ~7$~
microprocessor is turned on (step 300), the microprocessor sets both the read pointer and write pointer oî the memory device 206 to a starting base (0) address (step 301), initializes the communication channlel to a slave receiver mode and initializes the D/A converter 202 (step 302). The modem then awaits for an interrupt signal (stsp 303). If an interrupt signal is received from the communication channel (step 304), an ECG data byte is written to the memory 206 (step 305) and the internal write pointer in the memory is incremented (step 306). This loop continues until the entire data sequence from the recorder is received and written to the memory 206 in the modem.
With respect to transmission of the data stored in the memory 206, when an 8 millisecond interrupt signal is received at step 307 and it is determined that the address of the internal write pointer is greater than the address of the internal read pointer (step 308~, the sequential byte of ECG
data stored at the read pointer address of the memory 206 is read (step 309). This byte of data is then sent to the D/A
converter 202 for processing (step 310) and the internal read pointer is incremented (step 311). This loop is continued, with 8 millisecond sampling, until all of the data stored in memory 206 has been processed (i.e., until the read pointer address is the same as the write pointer address).
As can be seen from the foregoing detailed description, the present invention provides an improved apparatus for recording medical-grade ECG data and yet which is convenient and comfortable for a user to wear. This apparatus does not utilize paste-on electrodes. The inventive recorder has a high common mode rejection ratio due to the use of a three electrode configuration and a unique amplifier arrangement, and the design of the processing circuits insures long battery life. A separate, attachable modem device is provided for transmitting stored data from the recorder to a receiving station, this modem enabling transfer of data îrom the recorder in power-saving burst mode.
Claims (17)
1. A portable, encased apparatus having electronic circuitry for selectively monitoring and recording a user's ECG signals, wherein an electrode arrangement is provided for acquiring said ECG signals, said arrangement comprising:
a first conductive electrode disposed on a first surface of the apparatus casing for contact with an ECG lead position on the user's body; and second and third conductive electrodes disposed on at least one other surface of the apparatus casing and positioned for ease of contact by a thumb and finger, respectively, of the user's hand, wherein one of the second and third electrodes provides a ground signal source for the electronic circuitry.
a first conductive electrode disposed on a first surface of the apparatus casing for contact with an ECG lead position on the user's body; and second and third conductive electrodes disposed on at least one other surface of the apparatus casing and positioned for ease of contact by a thumb and finger, respectively, of the user's hand, wherein one of the second and third electrodes provides a ground signal source for the electronic circuitry.
2. The apparatus of claim 1, wherein a wristband is provided for securing the casing to a wrist of the user and the first conductive electrode is disposed on the back surface of the casing such that it lies in continuous electrical contact with the user's wrist.
3. The apparatus of claim 1, wherein the electronic circuitry comprises a power source;
circuit means coupled to the power source and the electrodes for receiving the user's analog ECG
signals only when the user grasps the second and third electrodes and for converting such signals into digitized format;
memory for receiving and storing the digitized ECG data; and a microprocessor for controlling storage of the digitized ECG data into the memory.
circuit means coupled to the power source and the electrodes for receiving the user's analog ECG
signals only when the user grasps the second and third electrodes and for converting such signals into digitized format;
memory for receiving and storing the digitized ECG data; and a microprocessor for controlling storage of the digitized ECG data into the memory.
4. The apparatus of claim 3, further comprising an output which is coupled to the memory and adapted for transmission of the digitized ECG data to an external receiver, wherein the microprocessor, upon command of the user, controls the transmission of the digitized data from the memory to the external receiver via the output.
5. The apparatus of claim 4, wherein the digitized data is transmitted to the external receiver in burst mode, thereby minimizing power consumption.
6. The apparatus of claim 3, wherein the microprocessor controls storage of a sequence of digitized ECG data into memory during each period of time that the user grasps the second and third electrodes, successive data sequences being stored in successive memory locations.
7. The apparatus of claim 6, wherein the power source is a battery and the microprocessor generates pulse signals representative of the remaining battery life and stores a pulse signal into memory in conjunction with each stored data sequence.
8. The apparatus of claim 3, further comprising means for visually indicating the amount of memory which is filled at any given moment.
9. A wrist-worn apparatus for selectively monitoring and recording a user's ECG data signals and transmitting such signals to an external receiver, comprising:
a casing having front, back and side surfaces and a wristband which secures the casing to a wrist of the user;
a first conductive electrode disposed on the back surface of the casing such that it lies in continuous electrical contact with the user's wrist;
second and third conductive electrodes disposed on any surface of the casing other than the back surface and positioned for ease of contact by the user with a thumb and finger, respectively, of the hand opposite the contacted wrist;
a power source;
circuit means coupled to the power source and the electrodes for receiving the user's analog ECG
signals only when the user grasps the second and third electrodes and for converting such signals into digitized format, the circuit means utilizing one of the second and third electrodes as a ground signal source;
memory for receiving and storing the digitized ECG data;
an output jack coupled to the memory and adapted for electrical connection to an input of the external receiver; and a microprocessor for controlling storage of the digitized ECG data in the memory and, upon command of the user, transmission of the digitized data from memory to the external receiver via the output jack.
a casing having front, back and side surfaces and a wristband which secures the casing to a wrist of the user;
a first conductive electrode disposed on the back surface of the casing such that it lies in continuous electrical contact with the user's wrist;
second and third conductive electrodes disposed on any surface of the casing other than the back surface and positioned for ease of contact by the user with a thumb and finger, respectively, of the hand opposite the contacted wrist;
a power source;
circuit means coupled to the power source and the electrodes for receiving the user's analog ECG
signals only when the user grasps the second and third electrodes and for converting such signals into digitized format, the circuit means utilizing one of the second and third electrodes as a ground signal source;
memory for receiving and storing the digitized ECG data;
an output jack coupled to the memory and adapted for electrical connection to an input of the external receiver; and a microprocessor for controlling storage of the digitized ECG data in the memory and, upon command of the user, transmission of the digitized data from memory to the external receiver via the output jack.
10. The apparatus of claim 9, wherein the microprocessor is activated and controls real time mode storage of the digitized ECG data into memory only when the user grasps the second and third electrodes.
11. The apparatus of claim 9, wherein the microprocessor controls storage of a sequence of digitized ECG data into memory during each period of time that the user grasps the second and third electrodes, successive data sequences being stored in successive memory locations, and wherein the power source is a battery and the microprocessor generates and stores a pulse signal representative of the remaining battery life in conjunction with each stored data sequence.
12. The apparatus of claim 9, wherein the digitized data is transmitted to the external receiver in burst mode, thereby minimizing power consumption.
13. The apparatus of claim 9, further comprising means for visually indicating the amount of memory which is filled at any given moment.
14. A system for selectively monitoring and recording a user's ECG data and transmitting such data to an external receiving station, comprising:
a portable recording unit having a casing which encloses electronic elements, including processing means, a power source and a first memory, and which carries three conductive electrodes that are electrically coupled to the electronic elements, a first one of the electrodes being disposed on a first surface of the casing for contact with an ECG lead position on the user's body and the other two electrodes being disposed on at least one other surface of the casing and positioned for ease of contact by the user with a thumb and finger, respectively, of a hand, whereby the unit monitors and processes the user's ECG data and stores it in memory only when the first electrode contacts a body lead position and the second and third electrodes are grasped by the user; and a modem which is adapted for electrical connection to the recording unit, comprising circuit means for processing the ECG data into a format which can be transmitted for analysis to the external receiving station and means for transmitting the processed ECG data to the external receiving station.
a portable recording unit having a casing which encloses electronic elements, including processing means, a power source and a first memory, and which carries three conductive electrodes that are electrically coupled to the electronic elements, a first one of the electrodes being disposed on a first surface of the casing for contact with an ECG lead position on the user's body and the other two electrodes being disposed on at least one other surface of the casing and positioned for ease of contact by the user with a thumb and finger, respectively, of a hand, whereby the unit monitors and processes the user's ECG data and stores it in memory only when the first electrode contacts a body lead position and the second and third electrodes are grasped by the user; and a modem which is adapted for electrical connection to the recording unit, comprising circuit means for processing the ECG data into a format which can be transmitted for analysis to the external receiving station and means for transmitting the processed ECG data to the external receiving station.
15. The system of claim 14, wherein the processing means of the recording unit comprises:
circuitry coupled to the power source and the electrodes for receiving the user's analog ECG data and converting such data into digitized format; and a microprocessor for controlling storage of the digitized EGG data into the first memory.
circuitry coupled to the power source and the electrodes for receiving the user's analog ECG data and converting such data into digitized format; and a microprocessor for controlling storage of the digitized EGG data into the first memory.
16. The system of claim 14, wherein the recording unit further comprises an output terminal which is coupled to the first memory and adapted for connection to an input terminal of the modem, the microprocessor in the recording unit, upon command of the user, controlling the transmission of the digitized data from the first memory to the input of the modem.
17. The system of claim 16, wherein the modem further comprises a second memory for receiving and storing ECG data from the first memory of the recording unit and a microprocessor for controlling the passage of ECG data to and from the second memory and to the circuit means.
PAT/54459CLM.-53/k?h
PAT/54459CLM.-53/k?h
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US757,254 | 1991-09-10 | ||
US07/757,254 US5191891A (en) | 1991-09-10 | 1991-09-10 | Portable ECG monitor/recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2077858A1 true CA2077858A1 (en) | 1993-03-11 |
Family
ID=25047067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002077858A Abandoned CA2077858A1 (en) | 1991-09-10 | 1992-09-09 | Portable ecg monitor/recorder |
Country Status (6)
Country | Link |
---|---|
US (2) | US5191891A (en) |
EP (1) | EP0540154A1 (en) |
JP (1) | JPH05293091A (en) |
AU (1) | AU2283892A (en) |
CA (1) | CA2077858A1 (en) |
IL (1) | IL103081A0 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU169652U1 (en) * | 2015-09-14 | 2017-03-28 | Общество с ограниченной ответственностью "Найтек" | PORTABLE DEVICE FOR REGISTRATION OF ELECTROCARDIOGRAMS |
Families Citing this family (260)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5289824A (en) * | 1991-12-26 | 1994-03-01 | Instromedix, Inc. | Wrist-worn ECG monitor |
EP0673530B1 (en) * | 1992-12-11 | 1998-05-27 | Siemens Medical Systems, Inc. | Docking station for a patient monitoring system |
JP3094799B2 (en) * | 1993-10-25 | 2000-10-03 | セイコーエプソン株式会社 | Portable equipment |
US5586556A (en) * | 1995-05-11 | 1996-12-24 | T Z Medical, Inc. | Pacemaker and heart monitoring and data transmitting device and method |
USD377983S (en) * | 1995-09-13 | 1997-02-11 | Mohamed Sabri | Cardiac monitor |
FR2741519B1 (en) * | 1995-11-28 | 1998-03-27 | Gilles Ascher | PORTABLE APPARATUS AND METHOD FOR INTERMITTENTLY AND RECORDING RECURRENT MEASUREMENTS, ESPECIALLY ON THE HUMAN BODY, SUCH AS BLOOD PRESSURE MEASUREMENTS |
US6163718A (en) * | 1996-02-01 | 2000-12-19 | Acumen, Inc. | Age-based heart rate target zone method and apparatus |
US5730143A (en) * | 1996-05-03 | 1998-03-24 | Ralin Medical, Inc. | Electrocardiographic monitoring and recording device |
US5735285A (en) * | 1996-06-04 | 1998-04-07 | Data Critical Corp. | Method and hand-held apparatus for demodulating and viewing frequency modulated biomedical signals |
US6496715B1 (en) | 1996-07-11 | 2002-12-17 | Medtronic, Inc. | System and method for non-invasive determination of optimal orientation of an implantable sensing device |
DE69734599T2 (en) * | 1996-07-11 | 2007-02-08 | Medtronic, Inc., Minneapolis | MINIMALLY INVASIVE IMPLANTABLE DEVICE FOR MONITORING PHYSIOLOGICAL PROCESSES |
US6689091B2 (en) | 1996-08-02 | 2004-02-10 | Tuan Bui | Medical apparatus with remote control |
US5885245A (en) * | 1996-08-02 | 1999-03-23 | Sabratek Corporation | Medical apparatus with remote virtual input device |
US5895371A (en) * | 1996-08-27 | 1999-04-20 | Sabratek Corporation | Medical treatment apparatus and method |
US6605057B2 (en) | 1996-10-24 | 2003-08-12 | Medtronic Ave, Inc. | Reinforced monorail balloon catheter |
US6102856A (en) * | 1997-02-12 | 2000-08-15 | Groff; Clarence P | Wearable vital sign monitoring system |
US6873340B2 (en) | 1997-05-15 | 2005-03-29 | Visimatix, Inc. | Method and apparatus for an automated reference indicator system for photographic and video images |
WO1998053734A1 (en) * | 1997-05-29 | 1998-12-03 | Gilles Ascher | Portable equipment and method for intermittent measurement |
US5931791A (en) * | 1997-11-05 | 1999-08-03 | Instromedix, Inc. | Medical patient vital signs-monitoring apparatus |
USD427243S (en) * | 1997-12-15 | 2000-06-27 | Visimatix, Inc. | Reference indicator patch for use in an automated reference indicator system for photographic and video images |
DE19758393B4 (en) * | 1997-12-23 | 2006-04-20 | Biotronik Meß- und Therapiegeräte GmbH & Co. Ingenieurbüro Berlin | Arrangement for patient monitoring |
CA2320183C (en) * | 1998-02-11 | 2006-12-19 | Biometrics, Inc. | Method for processing personal data |
US7996187B2 (en) | 2005-02-16 | 2011-08-09 | Card Guard Scientific Survival Ltd. | Method and system for health monitoring |
US6217525B1 (en) | 1998-04-30 | 2001-04-17 | Medtronic Physio-Control Manufacturing Corp. | Reduced lead set device and method for detecting acute cardiac ischemic conditions |
US6398727B1 (en) * | 1998-12-23 | 2002-06-04 | Baxter International Inc. | Method and apparatus for providing patient care |
US6231560B1 (en) | 1999-02-10 | 2001-05-15 | Baxter International Inc | Method and apparatus for automatically controlling the level of medication |
US6430436B1 (en) | 1999-03-01 | 2002-08-06 | Digital Concepts Of Missouri, Inc. | Two electrode heart rate monitor measuring power spectrum for use on road bikes |
US6115629A (en) * | 1999-03-01 | 2000-09-05 | Digital Concepts Of Missouri, Inc. | Two electrode heart rate monitor measuring power spectrum for use with exercise equipment |
US8265907B2 (en) * | 1999-03-03 | 2012-09-11 | Card Guard Scientific Survival Ltd. | System and a method for physiological monitoring |
US6200265B1 (en) | 1999-04-16 | 2001-03-13 | Medtronic, Inc. | Peripheral memory patch and access method for use with an implantable medical device |
DE19930241A1 (en) | 1999-06-25 | 2000-12-28 | Biotronik Mess & Therapieg | Procedure for data transmission in implant monitoring |
DE19930263A1 (en) | 1999-06-25 | 2000-12-28 | Biotronik Mess & Therapieg | Method and device for data transmission between an electromedical implant and an external device |
DE19930262A1 (en) | 1999-06-25 | 2000-12-28 | Biotronik Mess & Therapieg | Electromedical implant, especially pacemaker, has telemetry device transmitter containing oscillator with first transistor and resonator, buffer stage, antenna driver with second transistor |
DE19930250A1 (en) | 1999-06-25 | 2001-02-15 | Biotronik Mess & Therapieg | Device for monitoring data, in particular from an electromedical implant |
DE19930240A1 (en) | 1999-06-25 | 2000-12-28 | Biotronik Mess & Therapieg | Procedure for data retrieval during implant follow-up |
DE19930245A1 (en) | 1999-06-25 | 2000-12-28 | Biotronik Mess & Therapieg | Electromedical implant |
DE19929328A1 (en) * | 1999-06-26 | 2001-01-04 | Daimlerchrysler Aerospace Ag | Device for long-term medical monitoring of people |
US6264614B1 (en) | 1999-08-31 | 2001-07-24 | Data Critical Corporation | System and method for generating and transferring medical data |
FI19992484A (en) * | 1999-11-22 | 2001-05-23 | Polar Electro Oy | A method for performing the operation settings of a heart rate measurement arrangement and a heart rate measurement arrangement |
US6699200B2 (en) | 2000-03-01 | 2004-03-02 | Medtronic, Inc. | Implantable medical device with multi-vector sensing electrodes |
IL135240A0 (en) * | 2000-03-23 | 2001-05-20 | Shl Telemedicine Internat Ltd | Portable ecg signaling device |
US6775529B1 (en) | 2000-07-31 | 2004-08-10 | Marvell International Ltd. | Active resistive summer for a transformer hybrid |
US7095348B1 (en) | 2000-05-23 | 2006-08-22 | Marvell International Ltd. | Communication driver |
US7433665B1 (en) | 2000-07-31 | 2008-10-07 | Marvell International Ltd. | Apparatus and method for converting single-ended signals to a differential signal, and transceiver employing same |
US7113121B1 (en) | 2000-05-23 | 2006-09-26 | Marvell International Ltd. | Communication driver |
US7312739B1 (en) | 2000-05-23 | 2007-12-25 | Marvell International Ltd. | Communication driver |
US6462688B1 (en) | 2000-12-18 | 2002-10-08 | Marvell International, Ltd. | Direct drive programmable high speed power digital-to-analog converter |
US7194037B1 (en) | 2000-05-23 | 2007-03-20 | Marvell International Ltd. | Active replica transformer hybrid |
USRE41831E1 (en) | 2000-05-23 | 2010-10-19 | Marvell International Ltd. | Class B driver |
US20020016719A1 (en) * | 2000-06-19 | 2002-02-07 | Nemeth Louis G. | Methods and systems for providing medical data to a third party in accordance with configurable distribution parameters |
US7606547B1 (en) | 2000-07-31 | 2009-10-20 | Marvell International Ltd. | Active resistance summer for a transformer hybrid |
FI111129B (en) | 2000-08-30 | 2003-06-13 | Polar Electro Oy | Method, heart rate measurement arrangement and electrode structure for ECG signal measurement |
GB0022514D0 (en) * | 2000-09-14 | 2000-11-01 | Watmough David J | Improved instrumentation for detection of bioacoustic signals and low level sounds |
US6738671B2 (en) | 2000-10-26 | 2004-05-18 | Medtronic, Inc. | Externally worn transceiver for use with an implantable medical device |
WO2002056961A2 (en) | 2000-11-28 | 2002-07-25 | Medtronic, Inc. | Method and apparatus for discrimination of atrial fibrillation using ventricular rate detection |
AUPR229700A0 (en) * | 2000-12-22 | 2001-01-25 | Jankov, Vladimir | Processing apparatus for acquired signals |
US7088175B2 (en) * | 2001-02-13 | 2006-08-08 | Quantum Applied Science & Research, Inc. | Low noise, electric field sensor |
US20050119580A1 (en) | 2001-04-23 | 2005-06-02 | Eveland Doug C. | Controlling access to a medical monitoring system |
US6665385B2 (en) * | 2001-04-23 | 2003-12-16 | Cardionet, Inc. | Medical monitoring system having multipath communications capability |
US6694177B2 (en) | 2001-04-23 | 2004-02-17 | Cardionet, Inc. | Control of data transmission between a remote monitoring unit and a central unit |
FR2831046B1 (en) * | 2001-10-18 | 2004-09-03 | C2C | MONITORING TYPE ACQUISITION AND MONITORING DEVICE |
US20030125662A1 (en) | 2002-01-03 | 2003-07-03 | Tuan Bui | Method and apparatus for providing medical treatment therapy based on calculated demand |
US20030140928A1 (en) * | 2002-01-29 | 2003-07-31 | Tuan Bui | Medical treatment verification system and method |
US10173008B2 (en) | 2002-01-29 | 2019-01-08 | Baxter International Inc. | System and method for communicating with a dialysis machine through a network |
US8775196B2 (en) * | 2002-01-29 | 2014-07-08 | Baxter International Inc. | System and method for notification and escalation of medical data |
JP3867168B2 (en) * | 2002-04-16 | 2007-01-10 | アドバンスドメディカル株式会社 | Electrocardiograph |
US8234128B2 (en) | 2002-04-30 | 2012-07-31 | Baxter International, Inc. | System and method for verifying medical device operational parameters |
US7309315B2 (en) * | 2002-09-06 | 2007-12-18 | Epoch Innovations, Ltd. | Apparatus, method and computer program product to facilitate ordinary visual perception via an early perceptual-motor extraction of relational information from a light stimuli array to trigger an overall visual-sensory motor integration in a subject |
ATE479343T1 (en) * | 2002-10-01 | 2010-09-15 | Nellcor Puritan Bennett Inc | USE OF A HEADBAND FOR VOLTAGE DISPLAY AND SYSTEM OF OXYMETER AND HEADBAND |
US7698909B2 (en) * | 2002-10-01 | 2010-04-20 | Nellcor Puritan Bennett Llc | Headband with tension indicator |
FI116117B (en) * | 2003-04-17 | 2005-09-30 | Polar Electro Oy | Measuring device and method for measuring heart rate and the method of manufacture of the measuring device |
US6961601B2 (en) * | 2003-06-11 | 2005-11-01 | Quantum Applied Science & Research, Inc. | Sensor system for measuring biopotentials |
US7047056B2 (en) | 2003-06-25 | 2006-05-16 | Nellcor Puritan Bennett Incorporated | Hat-based oximeter sensor |
JP2005046215A (en) * | 2003-07-30 | 2005-02-24 | Omron Healthcare Co Ltd | Portable type electrocardiograph |
TWI234449B (en) * | 2003-08-20 | 2005-06-21 | Kang-Ping Lin | A electrocardiogram measuring device and its method |
EP2319410A1 (en) * | 2003-09-12 | 2011-05-11 | BodyMedia, Inc. | Apparatus for measuring heart related parameters |
DK175747B1 (en) * | 2003-09-26 | 2005-02-07 | Gn Netcom As | Communication unit, preferably head set, has operating buttons for adjustment of its electrical properties and is suspended in ear hook adjustable so that head set can be used on both left and right ears |
US7300406B2 (en) * | 2003-09-30 | 2007-11-27 | Carter Vandette B | Medical examination apparatus |
US8412297B2 (en) | 2003-10-01 | 2013-04-02 | Covidien Lp | Forehead sensor placement |
EP1678464A2 (en) * | 2003-10-07 | 2006-07-12 | Quantum Applied Science and Research, Inc. | Sensor system for measurement of one or more vector components of an electric field |
FI119172B (en) * | 2003-11-18 | 2008-08-29 | Nexstim Oy | Electrode construction for measuring electrical responses from a human body |
CA2683198C (en) * | 2003-11-26 | 2016-03-22 | Cardionet, Inc. | System and method for processing and presenting arrhythmia information to facilitate heart arrhythmia identification and treatment |
US20050148889A1 (en) * | 2003-12-30 | 2005-07-07 | Yu-Yu Chen | Wristwatch-typed heartbeat sensing device with two pairs of contacts |
US7194300B2 (en) * | 2004-01-21 | 2007-03-20 | Cardionet, Inc. | Cardiac monitoring |
US7587237B2 (en) | 2004-02-02 | 2009-09-08 | Cardionet, Inc. | Biological signal management |
EP1602326A1 (en) * | 2004-06-02 | 2005-12-07 | Boson Technology Co., Ltd. | Contact type pulse measurement device |
US7173437B2 (en) * | 2004-06-10 | 2007-02-06 | Quantum Applied Science And Research, Inc. | Garment incorporating embedded physiological sensors |
EP1761789A1 (en) * | 2004-07-01 | 2007-03-14 | Quantum Applied Science and Research, Inc. | A sensor system for measuring an electric potential signal of an object |
CA2477615A1 (en) * | 2004-07-15 | 2006-01-15 | Quantum Applied Science And Research, Inc. | Unobtrusive measurement system for bioelectric signals |
US20060041196A1 (en) * | 2004-08-17 | 2006-02-23 | Quasar, Inc. | Unobtrusive measurement system for bioelectric signals |
JP4705358B2 (en) * | 2004-10-15 | 2011-06-22 | 公立大学法人会津大学 | ECG measurement apparatus and ECG measurement system |
US20070049836A1 (en) * | 2004-12-07 | 2007-03-01 | Yu-Yu Chen | Electronic wristwatch-type exercise signal detecting apparatus |
US20060149156A1 (en) * | 2004-12-13 | 2006-07-06 | Cardiocore Lab, Inc. | Method and apparatus for transfer of captured electrocardiogram data |
US7308294B2 (en) | 2005-03-16 | 2007-12-11 | Textronics Inc. | Textile-based electrode system |
DE102005013429A1 (en) * | 2005-03-21 | 2006-09-28 | Flore, Ingo, Dr. | Mobile diagnostic device |
DE102005015466A1 (en) * | 2005-04-04 | 2006-10-05 | Klaus Dipl.-Ing. Engel | Animal`s e.g. running horse, heart muscle activities recording method, involves examining validity of recording of heart muscle activities in real time in combination with telemetric data communication |
KR100732600B1 (en) * | 2005-07-21 | 2007-06-27 | 삼성전자주식회사 | Portable device having biosignal-measuring instrument |
TWI417543B (en) * | 2005-08-05 | 2013-12-01 | Bayer Healthcare Llc | Meters and method of using meters having a multi-level user interface with predefined levels of user features |
US7312662B1 (en) | 2005-08-09 | 2007-12-25 | Marvell International Ltd. | Cascode gain boosting system and method for a transmitter |
EP2260756A1 (en) * | 2005-08-09 | 2010-12-15 | Flore, Ingo | Medical measuring device |
US8784336B2 (en) | 2005-08-24 | 2014-07-22 | C. R. Bard, Inc. | Stylet apparatuses and methods of manufacture |
US7577892B1 (en) | 2005-08-25 | 2009-08-18 | Marvell International Ltd | High speed iterative decoder |
US20070078324A1 (en) * | 2005-09-30 | 2007-04-05 | Textronics, Inc. | Physiological Monitoring Wearable Having Three Electrodes |
US8818496B2 (en) | 2005-10-14 | 2014-08-26 | Medicalgorithmics Ltd. | Systems for safe and remote outpatient ECG monitoring |
EP1952291A1 (en) * | 2005-10-14 | 2008-08-06 | Medicalgorithmics Sp. Z.O.O. | Method, device and system for lead-limited electrocardiography (ecg) signal analysis |
US20070100244A1 (en) * | 2005-10-31 | 2007-05-03 | Chin-Shu Lin | Wrist-worn monitor for heartbeat detection |
EP1954186A1 (en) * | 2005-11-23 | 2008-08-13 | Koninklijke Philips Electronics N.V. | Enhanced functionality and accuracy for a wrist-based multi-parameter monitor |
US8594771B2 (en) * | 2005-12-28 | 2013-11-26 | General Electric Company | Devices and methods for self-administered ECG examinations |
JP2007209609A (en) * | 2006-02-10 | 2007-08-23 | Omron Healthcare Co Ltd | Portable electrocardiograph |
US20070197925A1 (en) * | 2006-02-17 | 2007-08-23 | Moore Kenneth S | Acquisition of multiple-lead electrocardiogram |
US8160688B2 (en) | 2006-04-12 | 2012-04-17 | Vyssotski Alexei L | Integrated self-contained recorder of biological data for small animal research |
US9101264B2 (en) | 2006-06-15 | 2015-08-11 | Peerbridge Health, Inc. | Wireless electrode arrangement and method for patient monitoring via electrocardiography |
JP4153003B2 (en) * | 2006-09-04 | 2008-09-17 | シャープ株式会社 | Biological information measuring device, power consumption control method, biological information measuring program, and computer-readable recording medium |
US7794407B2 (en) | 2006-10-23 | 2010-09-14 | Bard Access Systems, Inc. | Method of locating the tip of a central venous catheter |
US8388546B2 (en) | 2006-10-23 | 2013-03-05 | Bard Access Systems, Inc. | Method of locating the tip of a central venous catheter |
US7878030B2 (en) | 2006-10-27 | 2011-02-01 | Textronics, Inc. | Wearable article with band portion adapted to include textile-based electrodes and method of making such article |
KR101451448B1 (en) * | 2006-11-23 | 2014-10-23 | 플로레, 잉고 | Medical Measuring Device |
WO2009033625A1 (en) * | 2007-09-07 | 2009-03-19 | Flore, Ingo | Medical measuring device for bioelectrical impedance measurement |
US8849382B2 (en) | 2007-11-26 | 2014-09-30 | C. R. Bard, Inc. | Apparatus and display methods relating to intravascular placement of a catheter |
US9521961B2 (en) | 2007-11-26 | 2016-12-20 | C. R. Bard, Inc. | Systems and methods for guiding a medical instrument |
US9636031B2 (en) | 2007-11-26 | 2017-05-02 | C.R. Bard, Inc. | Stylets for use with apparatus for intravascular placement of a catheter |
CN101925333B (en) | 2007-11-26 | 2014-02-12 | C·R·巴德股份有限公司 | Integrated system for intravascular placement of catheter |
US9649048B2 (en) | 2007-11-26 | 2017-05-16 | C. R. Bard, Inc. | Systems and methods for breaching a sterile field for intravascular placement of a catheter |
US10524691B2 (en) | 2007-11-26 | 2020-01-07 | C. R. Bard, Inc. | Needle assembly including an aligned magnetic element |
US10751509B2 (en) | 2007-11-26 | 2020-08-25 | C. R. Bard, Inc. | Iconic representations for guidance of an indwelling medical device |
US8781555B2 (en) | 2007-11-26 | 2014-07-15 | C. R. Bard, Inc. | System for placement of a catheter including a signal-generating stylet |
US10449330B2 (en) | 2007-11-26 | 2019-10-22 | C. R. Bard, Inc. | Magnetic element-equipped needle assemblies |
KR101460119B1 (en) * | 2008-01-10 | 2014-11-11 | 삼성전자주식회사 | Card type handheld terminal for measuring physiological signal |
US20090239708A1 (en) * | 2008-03-20 | 2009-09-24 | Holylite Microelectronics Corp. | Heart pulse detector with speed control for treadmill |
US20090259134A1 (en) * | 2008-04-12 | 2009-10-15 | Levine Glenn N | Symptom recording patient interface system for a portable heart monitor |
US20090306485A1 (en) * | 2008-06-03 | 2009-12-10 | Jonathan Arnold Bell | Wearable Electronic System |
US8121672B2 (en) * | 2008-06-13 | 2012-02-21 | Salutron, Inc. | Electrostatic discharge protection for wrist-worn device |
FI123360B (en) * | 2008-06-19 | 2013-03-15 | Seppo Juhani Saeynaejaekangas | Procedures and equipment for measuring heart rate |
US8057679B2 (en) | 2008-07-09 | 2011-11-15 | Baxter International Inc. | Dialysis system having trending and alert generation |
US10089443B2 (en) | 2012-05-15 | 2018-10-02 | Baxter International Inc. | Home medical device systems and methods for therapy prescription and tracking, servicing and inventory |
US9901714B2 (en) | 2008-08-22 | 2018-02-27 | C. R. Bard, Inc. | Catheter assembly including ECG sensor and magnetic assemblies |
US8257274B2 (en) | 2008-09-25 | 2012-09-04 | Nellcor Puritan Bennett Llc | Medical sensor and technique for using the same |
US8364220B2 (en) | 2008-09-25 | 2013-01-29 | Covidien Lp | Medical sensor and technique for using the same |
US20100081904A1 (en) * | 2008-09-30 | 2010-04-01 | Nellcor Puritan Bennett Llc | Device And Method For Securing A Medical Sensor to An Infant's Head |
US8437833B2 (en) | 2008-10-07 | 2013-05-07 | Bard Access Systems, Inc. | Percutaneous magnetic gastrostomy |
US8554579B2 (en) | 2008-10-13 | 2013-10-08 | Fht, Inc. | Management, reporting and benchmarking of medication preparation |
US8615290B2 (en) * | 2008-11-05 | 2013-12-24 | Apple Inc. | Seamlessly embedded heart rate monitor |
US20100156598A1 (en) * | 2008-12-18 | 2010-06-24 | Leung Ting Kwok | Rfid medical devices and systems for reading physiological parameter |
US8200319B2 (en) | 2009-02-10 | 2012-06-12 | Cardionet, Inc. | Locating fiducial points in a physiological signal |
US8515529B2 (en) * | 2009-02-12 | 2013-08-20 | Braemar Manufacturing, Llc | Detecting sleep disorders using heart activity |
DE102009011381A1 (en) | 2009-03-05 | 2010-09-09 | Flore, Ingo, Dr. | Diagnostic measuring device |
US8515515B2 (en) | 2009-03-25 | 2013-08-20 | Covidien Lp | Medical sensor with compressible light barrier and technique for using the same |
US9655518B2 (en) | 2009-03-27 | 2017-05-23 | Braemar Manufacturing, Llc | Ambulatory and centralized processing of a physiological signal |
US20100249541A1 (en) * | 2009-03-27 | 2010-09-30 | LifeWatch Corp. | Methods and Apparatus for Processing Physiological Data Acquired from an Ambulatory Physiological Monitoring Unit |
US8781548B2 (en) * | 2009-03-31 | 2014-07-15 | Covidien Lp | Medical sensor with flexible components and technique for using the same |
TW201036590A (en) * | 2009-04-02 | 2010-10-16 | Univ Nat Yang Ming | A stick shaped analytical apparatus of heart rate variability |
US10588527B2 (en) * | 2009-04-16 | 2020-03-17 | Braemar Manufacturing, Llc | Cardiac arrhythmia report |
US9532724B2 (en) | 2009-06-12 | 2017-01-03 | Bard Access Systems, Inc. | Apparatus and method for catheter navigation using endovascular energy mapping |
JP5795576B2 (en) * | 2009-06-12 | 2015-10-14 | バード・アクセス・システムズ,インコーポレーテッド | Method of operating a computer-based medical device that uses an electrocardiogram (ECG) signal to position an intravascular device in or near the heart |
WO2011019760A2 (en) | 2009-08-10 | 2011-02-17 | Romedex International Srl | Devices and methods for endovascular electrography |
EP2531098B1 (en) | 2010-02-02 | 2020-07-15 | C.R. Bard, Inc. | Apparatus and method for catheter navigation and tip location |
US8443634B2 (en) * | 2010-04-27 | 2013-05-21 | Textronics, Inc. | Textile-based electrodes incorporating graduated patterns |
JP5559425B2 (en) | 2010-05-12 | 2014-07-23 | イリズム・テクノロジーズ・インコーポレイテッド | Equipment mechanism and components for long-term adhesion |
MX2012013858A (en) | 2010-05-28 | 2013-04-08 | Bard Inc C R | Insertion guidance system for needles and medical components. |
WO2011150376A1 (en) | 2010-05-28 | 2011-12-01 | C.R. Bard, Inc. | Apparatus for use with needle insertion guidance system |
US8700137B2 (en) | 2012-08-30 | 2014-04-15 | Alivecor, Inc. | Cardiac performance monitoring system for use with mobile communications devices |
US8509882B2 (en) | 2010-06-08 | 2013-08-13 | Alivecor, Inc. | Heart monitoring system usable with a smartphone or computer |
US8301232B2 (en) | 2010-06-08 | 2012-10-30 | Alivecor, Inc. | Wireless, ultrasonic personal health monitoring system |
US9351654B2 (en) | 2010-06-08 | 2016-05-31 | Alivecor, Inc. | Two electrode apparatus and methods for twelve lead ECG |
MX338127B (en) | 2010-08-20 | 2016-04-04 | Bard Inc C R | Reconfirmation of ecg-assisted catheter tip placement. |
CN103189009B (en) | 2010-10-29 | 2016-09-07 | C·R·巴德股份有限公司 | The bio-impedance auxiliary of Medical Devices is placed |
TWI507171B (en) * | 2010-12-31 | 2015-11-11 | Wistron Corp | Measurement device, measurement system and data processing method for physiological signals |
TWI536195B (en) * | 2011-03-02 | 2016-06-01 | 緯創資通股份有限公司 | Devices and methods for receiving a physiological signal |
US9332919B2 (en) * | 2011-04-04 | 2016-05-10 | Cardiocity Limited | Heart monitoring apparatus |
GB2503055B (en) * | 2012-04-04 | 2018-08-29 | Cardiocity Ltd | Heart monitoring apparatus |
US8478418B2 (en) | 2011-04-15 | 2013-07-02 | Infobionic, Inc. | Remote health monitoring system |
KR20140051284A (en) | 2011-07-06 | 2014-04-30 | 씨. 알. 바드, 인크. | Needle length determination and calibration for insertion guidance system |
US8918578B2 (en) | 2011-08-02 | 2014-12-23 | General Electric Company | Method and system of a timer based buffer used for metrology |
NZ739406A (en) | 2012-08-31 | 2019-07-26 | Baxter Corp Englewood | Medication requisition fulfillment system and method |
EP3453377A1 (en) | 2012-10-26 | 2019-03-13 | Baxter Corporation Englewood | Improved work station for medical dose preparation system |
KR102078768B1 (en) | 2012-10-26 | 2020-02-19 | 백스터 코포레이션 잉글우드 | Improved image acquisition for medical dose preparation system |
WO2014074913A1 (en) | 2012-11-08 | 2014-05-15 | Alivecor, Inc. | Electrocardiogram signal detection |
KR101998066B1 (en) * | 2012-11-23 | 2019-10-01 | 삼성전자주식회사 | Signal processing device without mechanical switch for on/off operation |
WO2014107700A1 (en) | 2013-01-07 | 2014-07-10 | Alivecor, Inc. | Methods and systems for electrode placement |
AU2014209376B2 (en) | 2013-01-24 | 2017-03-16 | Irhythm Technologies, Inc. | Physiological monitoring device |
US9254092B2 (en) | 2013-03-15 | 2016-02-09 | Alivecor, Inc. | Systems and methods for processing and analyzing medical data |
CN105377127A (en) | 2013-03-15 | 2016-03-02 | 皮尔桥健康公司 | System and method for monitoring and diagnosing patient condition based on wireless sensor monitoring data |
WO2014168841A1 (en) | 2013-04-08 | 2014-10-16 | Irhythm Technologies, Inc | Skin abrader |
USD738971S1 (en) * | 2013-04-17 | 2015-09-15 | Tomtom International B.V. | Mount for an electronic personal training device |
US9247911B2 (en) | 2013-07-10 | 2016-02-02 | Alivecor, Inc. | Devices and methods for real-time denoising of electrocardiograms |
US9655538B2 (en) | 2013-09-25 | 2017-05-23 | Bardy Diagnostics, Inc. | Self-authenticating electrocardiography monitoring circuit |
US10092236B2 (en) | 2013-09-25 | 2018-10-09 | Zoll Medical Corporation | Emergency medical services smart watch |
US10463269B2 (en) | 2013-09-25 | 2019-11-05 | Bardy Diagnostics, Inc. | System and method for machine-learning-based atrial fibrillation detection |
US9619660B1 (en) | 2013-09-25 | 2017-04-11 | Bardy Diagnostics, Inc. | Computer-implemented system for secure physiological data collection and processing |
US9775536B2 (en) | 2013-09-25 | 2017-10-03 | Bardy Diagnostics, Inc. | Method for constructing a stress-pliant physiological electrode assembly |
US9700227B2 (en) | 2013-09-25 | 2017-07-11 | Bardy Diagnostics, Inc. | Ambulatory electrocardiography monitoring patch optimized for capturing low amplitude cardiac action potential propagation |
US10799137B2 (en) | 2013-09-25 | 2020-10-13 | Bardy Diagnostics, Inc. | System and method for facilitating a cardiac rhythm disorder diagnosis with the aid of a digital computer |
US10806360B2 (en) | 2013-09-25 | 2020-10-20 | Bardy Diagnostics, Inc. | Extended wear ambulatory electrocardiography and physiological sensor monitor |
US9433367B2 (en) | 2013-09-25 | 2016-09-06 | Bardy Diagnostics, Inc. | Remote interfacing of extended wear electrocardiography and physiological sensor monitor |
US9615763B2 (en) | 2013-09-25 | 2017-04-11 | Bardy Diagnostics, Inc. | Ambulatory electrocardiography monitor recorder optimized for capturing low amplitude cardiac action potential propagation |
US10736529B2 (en) | 2013-09-25 | 2020-08-11 | Bardy Diagnostics, Inc. | Subcutaneous insertable electrocardiography monitor |
US10165946B2 (en) | 2013-09-25 | 2019-01-01 | Bardy Diagnostics, Inc. | Computer-implemented system and method for providing a personal mobile device-triggered medical intervention |
US9655537B2 (en) | 2013-09-25 | 2017-05-23 | Bardy Diagnostics, Inc. | Wearable electrocardiography and physiology monitoring ensemble |
US10251576B2 (en) | 2013-09-25 | 2019-04-09 | Bardy Diagnostics, Inc. | System and method for ECG data classification for use in facilitating diagnosis of cardiac rhythm disorders with the aid of a digital computer |
US9545204B2 (en) | 2013-09-25 | 2017-01-17 | Bardy Diagnostics, Inc. | Extended wear electrocardiography patch |
US9408545B2 (en) | 2013-09-25 | 2016-08-09 | Bardy Diagnostics, Inc. | Method for efficiently encoding and compressing ECG data optimized for use in an ambulatory ECG monitor |
US20190167139A1 (en) | 2017-12-05 | 2019-06-06 | Gust H. Bardy | Subcutaneous P-Wave Centric Insertable Cardiac Monitor For Long Term Electrocardiographic Monitoring |
US10624551B2 (en) | 2013-09-25 | 2020-04-21 | Bardy Diagnostics, Inc. | Insertable cardiac monitor for use in performing long term electrocardiographic monitoring |
US9408551B2 (en) | 2013-11-14 | 2016-08-09 | Bardy Diagnostics, Inc. | System and method for facilitating diagnosis of cardiac rhythm disorders with the aid of a digital computer |
WO2015048194A1 (en) | 2013-09-25 | 2015-04-02 | Bardy Diagnostics, Inc. | Self-contained personal air flow sensing monitor |
US9504423B1 (en) | 2015-10-05 | 2016-11-29 | Bardy Diagnostics, Inc. | Method for addressing medical conditions through a wearable health monitor with the aid of a digital computer |
US9717432B2 (en) | 2013-09-25 | 2017-08-01 | Bardy Diagnostics, Inc. | Extended wear electrocardiography patch using interlaced wire electrodes |
US10667711B1 (en) | 2013-09-25 | 2020-06-02 | Bardy Diagnostics, Inc. | Contact-activated extended wear electrocardiography and physiological sensor monitor recorder |
US11723575B2 (en) | 2013-09-25 | 2023-08-15 | Bardy Diagnostics, Inc. | Electrocardiography patch |
US10736531B2 (en) | 2013-09-25 | 2020-08-11 | Bardy Diagnostics, Inc. | Subcutaneous insertable cardiac monitor optimized for long term, low amplitude electrocardiographic data collection |
US10820801B2 (en) | 2013-09-25 | 2020-11-03 | Bardy Diagnostics, Inc. | Electrocardiography monitor configured for self-optimizing ECG data compression |
US9345414B1 (en) | 2013-09-25 | 2016-05-24 | Bardy Diagnostics, Inc. | Method for providing dynamic gain over electrocardiographic data with the aid of a digital computer |
US10888239B2 (en) | 2013-09-25 | 2021-01-12 | Bardy Diagnostics, Inc. | Remote interfacing electrocardiography patch |
US10433751B2 (en) | 2013-09-25 | 2019-10-08 | Bardy Diagnostics, Inc. | System and method for facilitating a cardiac rhythm disorder diagnosis based on subcutaneous cardiac monitoring data |
US10905335B2 (en) | 2013-09-25 | 2021-02-02 | Zoll Medical Corporation | Emergency medical services smart watch |
US10433748B2 (en) | 2013-09-25 | 2019-10-08 | Bardy Diagnostics, Inc. | Extended wear electrocardiography and physiological sensor monitor |
US9737224B2 (en) | 2013-09-25 | 2017-08-22 | Bardy Diagnostics, Inc. | Event alerting through actigraphy embedded within electrocardiographic data |
US11213237B2 (en) | 2013-09-25 | 2022-01-04 | Bardy Diagnostics, Inc. | System and method for secure cloud-based physiological data processing and delivery |
US9364155B2 (en) | 2013-09-25 | 2016-06-14 | Bardy Diagnostics, Inc. | Self-contained personal air flow sensing monitor |
JP2017506376A (en) | 2013-11-29 | 2017-03-02 | モティヴ・インコーポレーテッドMotiv Inc. | Wearable computing device |
US10281953B2 (en) | 2013-11-29 | 2019-05-07 | Motiv Inc. | Wearable device and data transmission method |
ITPI20130096A1 (en) * | 2013-12-03 | 2015-06-04 | Alessandro Benini | ERGONOMIC AND SIMPLE USE OF ELECTROCARDIOGRAPH FOR RESIDENTIAL REMOTE MONITORING |
US9420956B2 (en) | 2013-12-12 | 2016-08-23 | Alivecor, Inc. | Methods and systems for arrhythmia tracking and scoring |
ES2811323T3 (en) | 2014-02-06 | 2021-03-11 | Bard Inc C R | Systems for the guidance and placement of an intravascular device |
TWM479113U (en) * | 2014-02-13 | 2014-06-01 | Cheng Uei Prec Ind Co Ltd | Heartbeat detecting bracelet |
USD756999S1 (en) | 2014-06-02 | 2016-05-24 | Motiv Inc. | Wearable computing device |
NZ727697A (en) | 2014-06-30 | 2022-05-27 | Baxter Corp Englewood | Managed medical information exchange |
US9734315B2 (en) | 2014-09-01 | 2017-08-15 | Lg Electronics Inc. | Wearable terminal |
US11575673B2 (en) | 2014-09-30 | 2023-02-07 | Baxter Corporation Englewood | Central user management in a distributed healthcare information management system |
US11107574B2 (en) | 2014-09-30 | 2021-08-31 | Baxter Corporation Englewood | Management of medication preparation with formulary management |
JP2018504148A (en) | 2014-10-31 | 2018-02-15 | アイリズム・テクノロジーズ・インコーポレイテッドiRhythm Technologies,Inc. | Wireless biological monitoring device and system |
KR102400106B1 (en) | 2014-11-17 | 2022-05-19 | 삼성전자주식회사 | ELECTROCARDIOGRAM SENSOR CHIP, SYSTEM ON CHIP (SoC), AND WEARABLE APPLIANCE |
WO2016090091A1 (en) | 2014-12-05 | 2016-06-09 | Baxter Corporation Englewood | Dose preparation data analytics |
US10973584B2 (en) | 2015-01-19 | 2021-04-13 | Bard Access Systems, Inc. | Device and method for vascular access |
WO2016134170A1 (en) * | 2015-02-18 | 2016-08-25 | Zhenyu Li | Electrocardiogram sensor ring |
AU2016226164A1 (en) | 2015-03-03 | 2017-10-19 | Baxter Corporation Englewood | Pharmacy workflow management with integrated alerts |
KR102420009B1 (en) * | 2015-04-08 | 2022-07-12 | 삼성전자주식회사 | apparatus for measuring biological information |
JP6498325B2 (en) | 2015-05-13 | 2019-04-10 | アライヴコア・インコーポレーテッド | Discrepancy monitoring |
WO2016207206A1 (en) | 2015-06-25 | 2016-12-29 | Gambro Lundia Ab | Medical device system and method having a distributed database |
WO2016210325A1 (en) | 2015-06-26 | 2016-12-29 | C.R. Bard, Inc. | Connector interface for ecg-based catheter positioning system |
USD783624S1 (en) * | 2015-12-02 | 2017-04-11 | Brian K. Reaux | Finger ring band for compact electronic device |
US11000207B2 (en) | 2016-01-29 | 2021-05-11 | C. R. Bard, Inc. | Multiple coil system for tracking a medical device |
USD794805S1 (en) | 2016-04-29 | 2017-08-15 | Infobionic, Inc. | Health monitoring device with a button |
USD794807S1 (en) | 2016-04-29 | 2017-08-15 | Infobionic, Inc. | Health monitoring device with a display |
US9968274B2 (en) | 2016-04-29 | 2018-05-15 | Infobionic, Inc. | Systems and methods for processing ECG data |
USD794806S1 (en) | 2016-04-29 | 2017-08-15 | Infobionic, Inc. | Health monitoring device |
JP6891414B2 (en) * | 2016-07-14 | 2021-06-18 | セイコーエプソン株式会社 | measuring device |
IT201600104297A1 (en) * | 2016-10-18 | 2017-01-18 | Torino Politecnico | Wearable device for the acquisition of electrocardiographic signals (ECG) |
KR102476516B1 (en) | 2016-12-21 | 2022-12-09 | 감브로 룬디아 아베 | A medical device system that includes an information technology infrastructure with secure cluster domains supporting external domains. |
KR102067979B1 (en) * | 2017-12-01 | 2020-01-21 | 웰빙소프트 주식회사 | Electrocardiography Device |
US10992079B2 (en) | 2018-10-16 | 2021-04-27 | Bard Access Systems, Inc. | Safety-equipped connection systems and methods thereof for establishing electrical connections |
US11096579B2 (en) | 2019-07-03 | 2021-08-24 | Bardy Diagnostics, Inc. | System and method for remote ECG data streaming in real-time |
US11696681B2 (en) | 2019-07-03 | 2023-07-11 | Bardy Diagnostics Inc. | Configurable hardware platform for physiological monitoring of a living body |
US11116451B2 (en) | 2019-07-03 | 2021-09-14 | Bardy Diagnostics, Inc. | Subcutaneous P-wave centric insertable cardiac monitor with energy harvesting capabilities |
US11213239B2 (en) * | 2019-09-26 | 2022-01-04 | Vie Longue Biotech Inc. | Portable multi-lead electrocardiogram device with inclined left and right hand contacts |
US11246524B2 (en) | 2020-02-12 | 2022-02-15 | Irhythm Technologies, Inc. | Non-invasive cardiac monitor and methods of using recorded cardiac data to infer a physiological characteristic of a patient |
JP7404951B2 (en) * | 2020-03-17 | 2023-12-26 | オムロンヘルスケア株式会社 | Biological information measuring device, control method and program for biological information measuring device |
CA3188343A1 (en) | 2020-08-06 | 2022-02-10 | Jeff ABERCROMBIE | Electrical components for physiological monitoring device |
AU2021322280A1 (en) | 2020-08-06 | 2023-04-06 | Irhythm Technologies, Inc. | Adhesive physiological monitoring device |
WO2022239624A1 (en) * | 2021-05-12 | 2022-11-17 | 国立大学法人大阪大学 | Measurement device |
Family Cites Families (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA949686A (en) * | 1971-07-09 | 1974-06-18 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government | Data transmitting terminal |
US3799148A (en) * | 1972-01-13 | 1974-03-26 | St Marys Hospital | Two recorder apparatus for monitoring heart action |
US3910260A (en) * | 1972-03-01 | 1975-10-07 | Survival Technology | Method and apparatus of treating heart attack patients prior to the establishment of qualified direct contact personal care |
US3792700A (en) * | 1972-03-01 | 1974-02-19 | Survival Technology | Apparatus and method of monitoring the electrical activity of the heart of a human with armpit located electrodes |
DE2333275A1 (en) * | 1972-06-30 | 1974-01-24 | Olympus Optical Co | DEVICE FOR RECORDING AND / OR REPLAYING BIOLOGICAL OPERATIONS |
US3872252A (en) * | 1973-03-07 | 1975-03-18 | Esb Inc | Apparatus for monitoring electrical signals, either artificial and/or natural in a living body, via a communication link |
US4121573A (en) * | 1973-10-04 | 1978-10-24 | Goebel Fixture Co. | Wireless cardiac monitoring system and electrode-transmitter therefor |
US3938507A (en) * | 1973-11-01 | 1976-02-17 | Survival Technology Incorporated | Portable heart monitor |
US4086916A (en) * | 1975-09-19 | 1978-05-02 | Joseph J. Cayre | Cardiac monitor wristwatch |
US4256117A (en) * | 1976-03-01 | 1981-03-17 | Jacob E. Perica | Cardiac monitor with stop watch means |
US4055729A (en) * | 1976-05-24 | 1977-10-25 | Exxon Research & Engineering Co. | Apparatus for the direct connection of ancillary equipment to a telephone network |
US4120294A (en) * | 1976-08-26 | 1978-10-17 | Wolfe Donna L | Electrode system for acquiring electrical signals from the heart |
US4129125A (en) * | 1976-12-27 | 1978-12-12 | Camin Research Corp. | Patient monitoring system |
FI55293C (en) * | 1977-05-23 | 1979-07-10 | Seppo Juhani Saeynaejaekangas | FOERFARANDE SAMT I ARMLEDEN OCH I FICKAN ANVAENDBAR ANORDNING FOER KONTUERLIG UPPMAETNING AV HJAERTPULSEN OCH PULSENS AOTERSTAELLNING |
US4183354A (en) * | 1977-07-18 | 1980-01-15 | Cardiodyne, Inc. | Ambulatory electrocardiographic recorder |
US4173971A (en) * | 1977-08-29 | 1979-11-13 | Karz Allen E | Continuous electrocardiogram monitoring method and system for cardiac patients |
US4221223A (en) * | 1978-05-24 | 1980-09-09 | Medtronic, Inc. | Cardiac monitoring apparatus |
US4337377A (en) * | 1980-01-10 | 1982-06-29 | Riper Wilbur E Van | Biologic apparatus |
US4417306A (en) * | 1980-01-23 | 1983-11-22 | Medtronic, Inc. | Apparatus for monitoring and storing utilizing a data processor |
JPS57120009U (en) * | 1981-01-19 | 1982-07-26 | ||
FR2514633A1 (en) * | 1981-10-20 | 1983-04-22 | Saint Nicolas Cie Financiere | Combined sphygmomanometer and electrocardiograph mounted on bracelet - has electrode in casing and second electrode in form of conductive pushbutton pressed by hand of other wrist of patient |
EP0108052A4 (en) * | 1982-04-23 | 1985-09-26 | Survival Technology | Ambulatory monitoring system with real time analysis and telephone transmission. |
US4633881A (en) * | 1982-07-01 | 1987-01-06 | The General Hospital Corporation | Ambulatory ventricular function monitor |
EP0101870A3 (en) * | 1982-08-05 | 1986-09-17 | Kontron-Holding Ag | Portable electrocardiologic apparatus |
US4489731A (en) * | 1983-02-04 | 1984-12-25 | H & B Technologies, Inc. | Pulse rate monitor |
FI68734C (en) * | 1983-11-11 | 1985-10-10 | Seppo Saeynaejaekangas | FOER FARAND FOR ORORDING FOR TELEMETRIC MAINTENANCE AV HANDLING FOR ECG SIGNAL WITH ANALYTICAL AV ETT MAGNETISKT NAERFAELT |
US4622979A (en) * | 1984-03-02 | 1986-11-18 | Cardiac Monitoring, Inc. | User-worn apparatus for monitoring and recording electrocardiographic data and method of operation |
US4535782A (en) * | 1984-03-07 | 1985-08-20 | American Cyanamid Company | Method for determining wound volume |
US4606352A (en) * | 1984-07-13 | 1986-08-19 | Purdue Research Foundation | Personal electrocardiogram monitor |
US4679144A (en) * | 1984-08-21 | 1987-07-07 | Q-Med, Inc. | Cardiac signal real time monitor and method of analysis |
US5029590A (en) * | 1985-08-09 | 1991-07-09 | Allain Joseph L | Portable, life detection monitor system |
US4802008A (en) * | 1987-02-09 | 1989-01-31 | Walling Paul J | Satellite communications system for medical related images |
JPH0191834A (en) * | 1987-08-20 | 1989-04-11 | Tsuruta Hiroko | Abnormal data detection and information method in individual medical data central control system |
US4858617A (en) * | 1987-09-10 | 1989-08-22 | Ith, Inc. | Cardiac probe enabling use of personal computer for monitoring heart activity or the like |
US4991200A (en) * | 1987-09-29 | 1991-02-05 | Paul Lin | Interface device for the intercommunication of a computer and a fax machine |
US4883064A (en) * | 1987-11-19 | 1989-11-28 | Equimed Corporation | Method and system for gathering electrocardiographic data |
US4889134A (en) * | 1988-03-25 | 1989-12-26 | Survival Technology, Inc. | Device for measuring multiple channels of heartbeat activity and encoding into a form suitable for simultaneous transmission over |
US4862896A (en) * | 1988-03-25 | 1989-09-05 | Survival Technology, Inc. | Monitoring device with dual position electrodes |
US4928690A (en) * | 1988-04-25 | 1990-05-29 | Lifecor, Inc. | Portable device for sensing cardiac function and automatically delivering electrical therapy |
US4967756A (en) * | 1988-06-15 | 1990-11-06 | Instromedix, Inc. | Blood pressure and heart rate monitoring method and apparatus |
US4993423A (en) * | 1988-07-13 | 1991-02-19 | Physio-Control Corporation | Method and apparatus for differential lead impedance comparison |
US4938228A (en) * | 1989-02-15 | 1990-07-03 | Righter William H | Wrist worn heart rate monitor |
US4958641A (en) * | 1989-03-10 | 1990-09-25 | Instromedix, Inc. | Heart data monitoring method and apparatus |
JP2781227B2 (en) * | 1989-06-30 | 1998-07-30 | 株式会社リコー | Group 4 facsimile communication adapter device |
US5050612A (en) * | 1989-09-12 | 1991-09-24 | Matsumura Kenneth N | Device for computer-assisted monitoring of the body |
US5012814A (en) * | 1989-11-09 | 1991-05-07 | Instromedix, Inc. | Implantable-defibrillator pulse detection-triggered ECG monitoring method and apparatus |
US5036852A (en) * | 1989-12-08 | 1991-08-06 | Leishman Mark L | Medical equipment monitor apparatus and method |
US5217020A (en) * | 1991-05-28 | 1993-06-08 | Hewlett-Packard Company | Biophysiological data acquisition including lead combination |
-
1991
- 1991-09-10 US US07/757,254 patent/US5191891A/en not_active Expired - Lifetime
-
1992
- 1992-09-07 IL IL92103081A patent/IL103081A0/en unknown
- 1992-09-08 AU AU22838/92A patent/AU2283892A/en not_active Abandoned
- 1992-09-09 EP EP92308178A patent/EP0540154A1/en not_active Withdrawn
- 1992-09-09 CA CA002077858A patent/CA2077858A1/en not_active Abandoned
- 1992-09-10 JP JP4241936A patent/JPH05293091A/en active Pending
-
1993
- 1993-07-12 US US08/090,298 patent/US5365935A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU169652U1 (en) * | 2015-09-14 | 2017-03-28 | Общество с ограниченной ответственностью "Найтек" | PORTABLE DEVICE FOR REGISTRATION OF ELECTROCARDIOGRAMS |
Also Published As
Publication number | Publication date |
---|---|
IL103081A0 (en) | 1993-02-21 |
AU2283892A (en) | 1993-03-11 |
US5191891A (en) | 1993-03-09 |
US5365935A (en) | 1994-11-22 |
EP0540154A1 (en) | 1993-05-05 |
JPH05293091A (en) | 1993-11-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5226425A (en) | Portable ECG monitor/recorder | |
US5191891A (en) | Portable ECG monitor/recorder | |
US4181134A (en) | Cardiotachometer | |
US4183354A (en) | Ambulatory electrocardiographic recorder | |
CA1263709A (en) | Portable apparatus for monitoring heart activity | |
US4622979A (en) | User-worn apparatus for monitoring and recording electrocardiographic data and method of operation | |
CA1082316A (en) | Electrode system for acquiring electrical signals from the heart | |
US4889134A (en) | Device for measuring multiple channels of heartbeat activity and encoding into a form suitable for simultaneous transmission over | |
US20050101875A1 (en) | Non-invasive body composition monitor, system and method | |
US6149602A (en) | User-worn electrocardiogram viewer device | |
US6496715B1 (en) | System and method for non-invasive determination of optimal orientation of an implantable sensing device | |
US4608994A (en) | Physiological monitoring system | |
US6251080B1 (en) | Self contained ambulatory blood pressure cincture | |
US5333616A (en) | Wrist-worn ECG monitor | |
US4038976A (en) | Pulse indicator | |
US4337377A (en) | Biologic apparatus | |
US5002064A (en) | Portable life detection monitor including lead fail detector and unique signal processing system | |
US20030069510A1 (en) | Disposable vital signs monitor | |
EP0650342A1 (en) | Heart monitoring apparatus | |
WO1997017012A9 (en) | Modular physiological computer-recorder | |
US6701183B2 (en) | Long term atrial fibrillation monitor | |
EP1569549A1 (en) | Combined wrist blood pressure and ecg monitor | |
US4412546A (en) | Cardiac monitoring apparatus | |
GB2168817A (en) | Electrocardiography device | |
JPH0414574B2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Discontinued |