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Publication numberUS3170459 A
Publication typeGrant
Publication dateFeb 23, 1965
Filing dateMar 20, 1962
Priority dateMar 20, 1962
Publication numberUS 3170459 A, US 3170459A, US-A-3170459, US3170459 A, US3170459A
InventorsKelly Glenn F, Phipps Clifford G
Original AssigneeKelly Glenn F, Phipps Clifford G
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Bio-medical instrumentation electrode
US 3170459 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Feb. 23, 1965 c. G. PHIPPS ETAL 3,170,459



Kelly, Jacksonville, Fla, assignors to the United States loIf America as represented by the Secretary of the Filed Mar. 20, 1962, Ser. No. 181,214 5'Claims. (Cl. 1282.ii6) (Granted under-Title 35, US. Code (1952), see. 266) The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

This invention relates to medical instrumentation, and more particularly to an instrumentation electrode capable of intercepting minute bio-electrical potentials which appear on the body surface of a subject and suitable for use in a dynamic environment.

Comparatively recentraerospace advances have accelerated the requirement for improved designs of electrodes for electroe ncephalograph and electrocardiograph devices that can be used in dynamic environments, and that will operate with a high degree of dependability.

Standard clinical electrodes presently in use consist for Such a design has been found to be satisfactory for labfit the most part of a relatively large metal plate, such as oratory use where the subject is in a static environment a and the sensitivity to pressure artifacts is not a factor in the electrical recording of the data.

However, under a dynamic environment, such as for a pilot occupying a full-pressure flight suit in an airborne vehicle, these prior art electrodes present several serious disadvantages. It has been found that use of the clinical electrode which relies on direct metal-to-skin contact normally presents relatively large contact potentials. These contact potentims are further increased by pressures, both positive and negative, that maybe caused by various artifacts, which reduce the intimacy of the contact between the electrode and skin and adversely affect the quality of the recorded bio-electrical potentials Heretofore, clinical electrodes were usually limited to limb extremities where they were subjected to excessive muscle potential artifacts. Attempts to use the clinicalelectrodes as torso leads, in an attempt to minimize muscle artifacts, were unsatisfactory because these prior art electrodes are too large, uncomfortable, and too difficult to relcasably attach to the body surface in a routine man- These considerations become critical when it is required to instrument inside a high-altitude, full pressure, flight suit to be occupied by a pilot where freedom of movement is an important factor.

The present invention presents advantages over theprior art electrodes mechanically and electrically in nature. Mechanically, the present electrode is small, light in Weight, and presents a thin profile which contributes to improved comfort to the subject, and reduces susceptibility to displacement by various pressures and friction. The electrode assembly is in the form of a patch comprising a series of superimposed layers of cork, or like insulating material, secured together and supporting therebetween a metal pellet electrode in fixed spaced distance from the skin thus avoiding metal-to-skin contact. The pellet is provided with an electrical conductor for connection into the recording circuit. The hollow space between the pellet and the skin, being of optimum size, is filled with a conductive paste which creates a conductive path therebetween, the composition of the paste being compatible with the body saline electrolyte. The conductive paste maybe retained in position within the patch by impregnating a resilient sponge-like material. A pressure sensitive adhesive on the face of the cork layer adjacent the skin not only provides an effective and simple means of attaching the electrode patch to the desired skin area thereby eliminating the requirement for adhesive plaster strips, but more important it also serves to hermetically seal the paste within the electrode assembly as well as maintaining the fixed spacing between the electrode pellet and the skin which defines the electrical bridge.

An object of the invention is to provide a bio-medical electrode device which is small, compact and sufficiently thin to be used in dynamic environments, such as by a pilot under flightconditions, and under a variety of we ternal forces.

Another object of the invention is to provide such an electrode device which will maintain aconstant or fixed conductive path with the skin throughout the application of either a negative or positive pressure to the skin area supporting the electrode, and a corollary object'is to provide such a device which is insensitive to displace} ment.

cost per application; and which can be used over relatively long periods of time without developinginstabilities.

Other objects and many of the attendant advantages of this invention will be readily appreciated asthe same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein: I

FIG. 1 is an exploded perspective elevation View of the electrode patch assembly; and

FIG. 2 is an enlarged vertical section through an assembled electrode unit adhered to a skin surface of a subject. I

Referring to the figureswhere like reference numerals refer to similar parts throughout the drawing there is illustrated in FIGS. 1 and 2 a bio-medical electrode patch assembly 10 comprising a housing 11 of a plurality of thin discs, three being illustrated, namely 12, 14, and 16, arranged in a sandwiched relation. The term disc is not intended to limit the use to circular layers, although such a shape is preferred as almatt'er of avoiding-sharp corners that may catch clothing, etc., as Well as increased structural strength sincethe discs willbc fabricated with openings for purposes later to be described. In the pre ferred embodiment, disc 12 is a base member, disc rats a spacer member, and disc 16 is a cover member. The discs are made of insulating material, such ascork, which is light in weight, relatively incompressible, and has the desired flexibility for compliance with the selected skin area. The various dimensions thereinafter noted are of one sample electrode patch assembly that in practice has been found to be completely satisfactory, and while these dimensions can be varied, it is believed that certain considerations must be accounted for. In the e ample, the discs are all 23 millimeters in diameter; baseoand spacer discs being 2 millimeters in thickness while cover disc is 1 to 2.millimeters in thickness. Since the electrode patch is to be used under flight suits, etc., the smallest thickness of the assembly consonant with satisfactory structural integrity is desired. Spacer disc l4 has a cen-. tral hole 18, which in the example has been made :9 millimeters in diameter, to accommodate snugly a metallic electrode pellet 29 of a corresponding diameter, the pellet having attached thereto a conductor 22 adapted to be Still another objectis to provide a medical electrode.

connected in a recording circuit, not shown. The pellet is the same thickness, namely 2 millimeters as spacer disc The electrode pellet 20 is preferably made of a mixture 7 of equal weights of silver and silver chloride, although it is believed that each ingredient could be varied from 30 to 70% and still provide satisfactory results.

Base disc 12 is also provided with a central hole 26, the example having a millimeter diameter, being smaller than hole 18 to provide a 2 millimeter circular lip to ensure that electrode pallet 20 is firmly and tightly supported between the cover disc and the basedisc when assembled. Hole 26 in the base disc defines the area 27 of the subjects skin from which thepotential is to be measured, and the size has optimum limits as will be explained. Electrical conductivity through hole 26, a distance of 2 millirneters, between the electrode I pellet and the skin area is bridged by a conductive paste or gel 29, such as the commercially available graphojel manufactured by TablaX Company, New York, New York which is inserted in the cup-like area. Where the electrode device is to be applied for relatively long periods of time or where the device is subjected to various external pressures, it may be desirable to reinforce the electrical bridge by using a fine-celled sponge 30 Whichfits into base hole 26, the

, sponge being impregnated with the conductive paste which isretained therein. The fitting, assembly, and application of the assembled electrode device to the subjects skin are all important to achieve a near-hermetic sealed space for the 'conductive'gel.

As a production step, spacer disc 14 may be permanently cemented by 32 to a base disc 12, so that electrode pellet 20 and lead 22 may be readily seated in their respective openings in the spacer disc. As previously described, the fit is very snug, and as the electrode pellet is fiush with the surrounding cork disc, the electrode pellet is firmlyfixed and sealed therein when cover disc 16 is secured thereto by integral contact adhesive layers on the contacting faces of the cover and spacer discs, represented by adhesive 34a on the cover disc. However, as will be later described, cover disc 16 is applied as the last step in the procedure of applying the electrode patch. The open face of the base disc is also provided with an integral contact adhesive 34!: suitably protected by a thin cloth air tight layer 35 with which the cork disc is manufactured to preserve the contact adhesive until ready for use, such a protective layer may also be provided on the adhesively coated face of cover 16, not shown. Adhesive 34b on the base disc has other functions in addition to securing the electrode patch to the skin which will be hereinafter described.

The selected skin area on the subject is first cleansed with alcohol. to remove surface oils and easily removable foreign matter. The area is then scrubbed with the conductive paste until the area develops a redness. The area is then washed with a detergent solution. ring of tincture of benzoincompound approximately the size .of'the electrode patch is applied with at least a 5 mm. centered hole left uncovered. With protective layer 36 removed, the spacer and base disc assembly is then pressed on the skin'withlthe uncovered skin area concentric with hole 26 of the base disc. The conductive paste is then inserted into hole 26. When sponge 30 is to be employed, the paste is filled to a depth of ap proximately 1 mm. prior to insertion of the paste impregnated sponge. Any remaining space is filled with additional conductive paste. The undercontacting surface of electrode pellet 20 is then next coated with a thin layer of the conductive paste and inserted in hole 13 of the spacer disc with conductor 22 firmly seated in groove 24. Finally,jcover disc 12 is adhesively pressed over spacer disc 14. a

Next a t It is believed that improved electrical characteristics of the invention electrode assembly are achieved primarily by maintaining a fixed electrical bridge through the conductive paste between the electrode pellet and the skin area. This is achieved by firmly supporting the electrode pellet in the assembly without play, and also by preventing any relative movement between the electrode pellet and the skin. For example, increasing the diameter of hole 26 substantially greater than 5 mm. would allow the skin area to bulge in, or move out of, hole 26 depending on whether there was a positive, or negative pressure on the applied electrode patch, respectively. Decreasing the diameter of hole 26 substantially less than 5 mm. unduly limits the potential that can be transmitted. The maintenance of the fixed ele'ctrical path is further achieved by adhesive 34b which secures base disc 12 firmly and completely around skin area 27 reducing to a minimum any displacement of the skin with respect to the electrical patch assembly. In other words, skin area 27 is displaced piston-like by any external force, and the electrode pellet follows by the same distance. In event there is a slight relative displacement between the encircled skin area and the electrode pellet, the resilient characteristics of the impregnated sponge will maintain good electrical continuity even if some of the conductive paste escapes. V V

Adhesive 3412 also functions to seal the electrical patch assembly to the skin to prevent the escape and evaporation of the conductive paste in base disc hole 26, the tight fit of electrode pellet in spacer disc 14 and cover 16 pre venting the escape of the conductive paste through the patch assembly. p a

Low values of skin/electrode resistance are desirable because of the tendency to resistance modulate the amplifier of the recording circuit, not shown,by instabilities due to displacement of the electrode assembly by external forces is minimized. These forces are normal to, or lateral to, the plane 'of the skin. It is important that the electrode patch assembly be insensitive to these forces. Reduced potential difference across the electrode patch assembly is achieved through the interface functions consisting of a pellet-paste couple and the paste skin couple, compatibility existing in the ionic structure of the electrode pellet, the conductive paste, and the skin.

After one application of the electrode patch assembly, the cork disc components can be stripped away and discarded, and the electrode pellet and conductor reused in a new cork assembly.

According to the present invention there is provided an improved bio-medical electrode suitable for use in dynamic environments. The assembly is small, compact, light weight and has a low profile lesssubject to lateral displacement that may upset the applied patch. These factors are important to attenuate discomfort and fatigue for the user, especially over extended periods. Elimination of the metal-to-skin contact by use of a conductive paste bridge, and maintaining this electrical bridge constant, that is, supporting the electrode pellet at an unvarying distance from the skinthroughout use, reduces adverse effects of varying the resistance inthe recording circuitand eliminates pressure artifacts as a trouble source in the system. Securing the electrode patch assembly to the skin area directly by an adhesive helps to achieve the constant electrical path; to obtain a hermetically sealed enclosure for the conductive paste; and reduces the effects of lateral forces on the patch.

Obviously many modifications and variations of the present invention are possible in the light of the above teachings. It is therefore tobe understood that within the scope of the appended claims the invention may 'be practiced otherwise than as specifically described.

We claim:

1. A bio-medical electrode assembly for attaching to a subjects skin, comprising a housing composed of a plurality of superimposed fiatlayers'of flexible insulation material adhesively secured together, one of said layers having a face portion adapted physically to contact the skin, an electrode supported between said layers in fixed, spaced relation to said skin, said housing having a central opening capable of containing a conductive paste for creating a single conductive path between said electrode and the subjects skin, and adhesive means on the face portion of the body for adhering the assembly including the entire edge of the opening completely around the skin area opposite said housing opening so as to maintain a fixedelectrical path of constant resistance between the electrode and the subjects skin.

2. The electrode assembly of claim 1 wherein said electrode is firmly supported in a central opening in an adjacent layer, said opening being in juxtaposition to the opening containing the conductive paste.

3. A bio-medical electrode assembly forattaching to a subjects skin, comprising a housing composed of a plurality of superimposed cork discs including a base disc hav-- ing a first central opening, the remaining portion of the base disc facing the skin having a coating of a pressure sensitive adhesive, an intermediate disc having a central opening larger than said first opening and a narrow slot extending from said second central opening to the outer edge of said intermediate disc, a metal electrode pellet and associated conductor snugly fitting into said second opening and slot, respectively, a cover disc, adhesive means for securing and sealing said intermediate disc to the cover disc, and the intermediate disc to the base disc with the electrode and conductor fixed in position, said first opening capable of containing a conductive paste to create an electrical bridge between said electrode and the skin area,

the adhesive on the face of the base disc capable of adhering the electrode assembly to the skin and of sealing the conductive paste within said first opening.

4. The electrode assembly of claim 3 wherein a spongelike member is housed within said first opening and i111- pregnated with conductive paste.

5. The method of securing a bio-medical electrode as sembly to a subjects skin, said assembly including a body member having a plurality of flexible insulation discs, one disc being a cover disc and another disc being a base disc having a central opening to receive an electrically con ductive paste and an electrode adjacent said opening and in contact with said paste, the steps of first adhesively securing the base disc to a selected area of the skin completely around at least the entire edge of said base opening for the paste, filling said opening in the base with the conductive paste and then with the electrode in position adhesively applying said cover disc on top of said base disc to secure the electrode Within the base disc.

References Qited by the Examiner UNITED STATES PATENTS RECHARD A. GAUDET, Primary Examiner.


Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US562765 *Dec 30, 1895Jun 23, 1896 iiorton
US1583087 *Dec 19, 1921May 4, 1926Morse Frederick HSurface electrode for electrical therapeutic apparatus
US2895479 *Sep 13, 1957Jul 21, 1959Lloyd Roger AElectrocardiograph electrode
US2943628 *Feb 27, 1957Jul 5, 1960Howell William LElectrode assembly
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3295515 *Nov 5, 1963Jan 3, 1967Beckman Instruments IncElectrode assembly
US3340868 *Mar 5, 1965Sep 12, 1967Gen ElectricBody signal pickup electrode
US3387608 *Jan 4, 1965Jun 11, 1968Ceskoslovenska Akademie VedElectrode for electromedical measurement
US3420223 *Dec 31, 1964Jan 7, 1969NasaElectrode for biological recording
US3464404 *Jun 17, 1966Sep 2, 1969Univ Johns HopkinsBio-medical instrumentation electrode
US3468303 *Jan 5, 1967Sep 23, 1969NasaPlated electrodes
US3476116 *Nov 9, 1967Nov 4, 1969Myers George HNonpolarizing electrode for physiological stimulation
US3508541 *Oct 16, 1967Apr 28, 1970NasaElectrode construction
US3518984 *Oct 12, 1967Jul 7, 1970Univ Johns HopkinsPackaged diagnostic electrode device
US3565059 *Jun 7, 1968Feb 23, 1971Hauser Research And EngineerinBiological electrode and method of making same
US3599629 *Aug 28, 1968Aug 17, 1971Lexington InstrOxidized surface biopotential skin electrode
US3640270 *Jul 29, 1970Feb 8, 1972Niess Elektromed IngeborgElectric contactor with venturi-suction means for organic tissue
US3701346 *Jan 4, 1971Oct 31, 1972Bionetics IncMedical electrode
US3788317 *Jan 12, 1972Jan 29, 1974Pelam IncPorous absorbent pad electrode for use with an electrocardiograph instrument or the like
US3805769 *May 24, 1973Apr 23, 1974Sessions RDisposable electrode
US3834373 *Feb 24, 1972Sep 10, 1974Sato TSilver, silver chloride electrodes
US3845757 *Jul 12, 1972Nov 5, 1974Minnesota Mining & MfgBiomedical monitoring electrode
US3868946 *Jul 13, 1973Mar 4, 1975Hurley James SMedical electrode
US3946730 *Jan 21, 1972Mar 30, 1976Ndm CorporationBiomedical electrode assembly
US4040412 *Feb 3, 1976Aug 9, 1977Sato Takuya RBioelectrodes
US4050453 *Feb 3, 1976Sep 27, 1977Concept, Inc.Radiotransparent electrode
US4051842 *Sep 15, 1975Oct 4, 1977International Medical CorporationElectrode and interfacing pad for electrical physiological systems
US4126126 *Jul 27, 1976Nov 21, 1978C. R. Bard, Inc.Non-metallic pregelled electrode
US4219027 *Jan 16, 1979Aug 26, 1980NasaSubcutaneous electrode structure
US4257424 *Apr 30, 1979Mar 24, 1981Ndm CorporationX-ray transparent medical electrode
US4370984 *Mar 23, 1981Feb 1, 1983Ndm CorporationX-Ray transparent medical electrode
US4401125 *Sep 21, 1981Aug 30, 1983The Kendall CompanyStethoscope securing pad
US4510938 *Jan 24, 1983Apr 16, 1985Duke University, Inc.Body-mounted light source-detector apparatus
US4674511 *May 9, 1984Jun 23, 1987American Hospital Supply CorporationMedical electrode
US4715382 *Aug 1, 1986Dec 29, 1987Minnesota Mining And Manufacturing CompanyFlat biomedical electrode with reuseable lead wire
US4727880 *Aug 1, 1986Mar 1, 1988Minnesota Mining And Manufacturing CompanyFlat, conformable, biomedical electrode
US4771783 *Oct 3, 1986Sep 20, 1988Minnesota Mining And Manufacturing CompanyFlat, conformable, biomedical electrode
US4838273 *Jun 22, 1987Jun 13, 1989Baxter International Inc.Medical electrode
US5817008 *Oct 31, 1996Oct 6, 1998Spacelabs Medical, Inc.Conformal pulse oximetry sensor and monitor
US7065396 *Jul 30, 2002Jun 20, 2006The Curavita CorporationSystem and method for non-invasive monitoring of physiological parameters
US7440789 *Nov 16, 2004Oct 21, 2008Nexstim OyElectrode structure for measuring electrical responses from the human body
US8116841Sep 12, 2008Feb 14, 2012Corventis, Inc.Adherent device with multiple physiological sensors
US8249686Sep 12, 2008Aug 21, 2012Corventis, Inc.Adherent device for sleep disordered breathing
US8285356Jan 10, 2012Oct 9, 2012Corventis, Inc.Adherent device with multiple physiological sensors
US8374688Sep 12, 2008Feb 12, 2013Corventis, Inc.System and methods for wireless body fluid monitoring
US8412317Apr 20, 2009Apr 2, 2013Corventis, Inc.Method and apparatus to measure bioelectric impedance of patient tissue
US8460189Sep 12, 2008Jun 11, 2013Corventis, Inc.Adherent cardiac monitor with advanced sensing capabilities
US8591430Sep 12, 2008Nov 26, 2013Corventis, Inc.Adherent device for respiratory monitoring
US8684925Sep 12, 2008Apr 1, 2014Corventis, Inc.Injectable device for physiological monitoring
US8715329Feb 24, 2009May 6, 2014Mcneil-Ppc, Inc.Thermal treatment device
US8718752Mar 11, 2009May 6, 2014Corventis, Inc.Heart failure decompensation prediction based on cardiac rhythm
US8790257Sep 12, 2008Jul 29, 2014Corventis, Inc.Multi-sensor patient monitor to detect impending cardiac decompensation
US8790259Oct 22, 2010Jul 29, 2014Corventis, Inc.Method and apparatus for remote detection and monitoring of functional chronotropic incompetence
US8897868Sep 12, 2008Nov 25, 2014Medtronic, Inc.Medical device automatic start-up upon contact to patient tissue
US8965498Mar 28, 2011Feb 24, 2015Corventis, Inc.Method and apparatus for personalized physiologic parameters
US9173615Sep 23, 2014Nov 3, 2015Medtronic Monitoring, Inc.Method and apparatus for personalized physiologic parameters
US9186089Sep 12, 2008Nov 17, 2015Medtronic Monitoring, Inc.Injectable physiological monitoring system
US9411936Sep 12, 2008Aug 9, 2016Medtronic Monitoring, Inc.Dynamic pairing of patients to data collection gateways
US9451897Dec 2, 2010Sep 27, 2016Medtronic Monitoring, Inc.Body adherent patch with electronics for physiologic monitoring
US9538960Oct 23, 2015Jan 10, 2017Medtronic Monitoring, Inc.Injectable physiological monitoring system
US9579020May 24, 2013Feb 28, 2017Medtronic Monitoring, Inc.Adherent cardiac monitor with advanced sensing capabilities
US9615757Jun 20, 2014Apr 11, 2017Medtronic Monitoring, Inc.Method and apparatus for remote detection and monitoring of functional chronotropic incompetence
US9668667Nov 14, 2014Jun 6, 2017Medtronic Monitoring, Inc.Method and apparatus to measure bioelectric impedance of patient tissue
US20030028117 *Jul 30, 2002Feb 6, 2003Hampton Thomas G.System and method for non-invasive monitoring of physiological parameters
US20070106141 *Nov 16, 2004May 10, 2007Henri HannulaElectrode structure for measuring electrical responses from the human body
US20090073991 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Dynamic Pairing of Patients to Data Collection Gateways
US20090076336 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Medical Device Automatic Start-up Upon Contact to Patient Tissue
US20090076340 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Adherent Cardiac Monitor with Advanced Sensing Capabilities
US20090076341 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Adherent Athletic Monitor
US20090076342 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Adherent Multi-Sensor Device with Empathic Monitoring
US20090076343 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Energy Management for Adherent Patient Monitor
US20090076344 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Multi-Sensor Patient Monitor to Detect Impending Cardiac Decompensation
US20090076345 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Adherent Device with Multiple Physiological Sensors
US20090076346 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Tracking and Security for Adherent Patient Monitor
US20090076348 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Injectable Device for Physiological Monitoring
US20090076349 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Adherent Multi-Sensor Device with Implantable Device Communication Capabilities
US20090076350 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Data Collection in a Multi-Sensor Patient Monitor
US20090076363 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Adherent Device with Multiple Physiological Sensors
US20090076364 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Adherent Device for Sleep Disordered Breathing
US20090076397 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Adherent Emergency Patient Monitor
US20090076401 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Injectable Physiological Monitoring System
US20090076405 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Adherent Device for Respiratory Monitoring
US20090076410 *Sep 12, 2008Mar 19, 2009Corventis, Inc.System and Methods for Wireless Body Fluid Monitoring
US20090076559 *Sep 12, 2008Mar 19, 2009Corventis, Inc.Adherent Device for Cardiac Rhythm Management
US20090163984 *Dec 19, 2008Jun 25, 2009Robinson Ronni LThermal treatment device
US20090222072 *Feb 24, 2009Sep 3, 2009Robinson Ronni LThermal treatment device
US20090234410 *Mar 11, 2009Sep 17, 2009Corventis, Inc.Heart Failure Decompensation Prediction Based on Cardiac Rhythm
US20090264792 *Apr 20, 2009Oct 22, 2009Corventis, Inc.Method and Apparatus to Measure Bioelectric Impedance of Patient Tissue
US20090292194 *May 19, 2009Nov 26, 2009Corventis, Inc.Chiropractic Care Management Systems and Methods
US20100161014 *Dec 17, 2009Jun 24, 2010Lynch Joseph MThermal treatment device
US20100191310 *Jul 27, 2009Jul 29, 2010Corventis, Inc.Communication-Anchor Loop For Injectable Device
US20110144470 *Dec 2, 2010Jun 16, 2011Corventis, Inc.Body adherent patch with electronics for physiologic monitoring
DE4120688A1 *Jun 22, 1991Jan 14, 1993Wienert VolkerQuantitative detection appts. for fluorescent material in human skin tissue - uses measurement head with stimulation light source and tuned photodiode fluorescent light receiver
DE102004041781A1 *Aug 28, 2004Mar 2, 2006Finkenzeller, Peter, Prof. Dr.rer.nat.Manufacturing device for making electrode gel layer used between the skin and electrode of brain potential conduction apparatus, has retainer for holding electrode so that gel cushion can be mounted to electrode
WO2011081891A1Dec 13, 2010Jul 7, 2011Corventis, Inc.Body adherent patch with electronics for physiologic monitoring
U.S. Classification600/391, 600/396, 600/397
International ClassificationA61N1/04
Cooperative ClassificationA61N1/04
European ClassificationA61N1/04