CA2055850A1 - Tonometry system for determining blood pressure - Google Patents
Tonometry system for determining blood pressureInfo
- Publication number
- CA2055850A1 CA2055850A1 CA002055850A CA2055850A CA2055850A1 CA 2055850 A1 CA2055850 A1 CA 2055850A1 CA 002055850 A CA002055850 A CA 002055850A CA 2055850 A CA2055850 A CA 2055850A CA 2055850 A1 CA2055850 A1 CA 2055850A1
- Authority
- CA
- Canada
- Prior art keywords
- diaphragm
- blood pressure
- patient
- electromagnetic radiation
- continuous
- 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.)
- Granted
Links
- 230000036772 blood pressure Effects 0.000 title abstract 2
- 230000005670 electromagnetic radiation Effects 0.000 abstract 2
- 239000004065 semiconductor Substances 0.000 abstract 2
- 230000032683 aging Effects 0.000 abstract 1
- 210000001367 artery Anatomy 0.000 abstract 1
- 238000001361 intraarterial administration Methods 0.000 abstract 1
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000035882 stress Effects 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
- A61B5/02422—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation within occluders
-
- 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
- A61B2560/02—Operational features
- A61B2560/0242—Operational features adapted to measure environmental factors, e.g. temperature, pollution
- A61B2560/0247—Operational features adapted to measure environmental factors, e.g. temperature, pollution for compensation or correction of the measured physiological value
- A61B2560/0252—Operational features adapted to measure environmental factors, e.g. temperature, pollution for compensation or correction of the measured physiological value using ambient temperature
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0247—Pressure sensors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/04—Arrangements of multiple sensors of the same type
- A61B2562/043—Arrangements of multiple sensors of the same type in a linear array
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
Abstract
A tissue contact stress sensing system incorporates a semiconductor assembly and a continuous diaphragm to noninvasively determine the intra-arterial blood pressure of a patient. The system comprises a continuous diaphragm placed against a patient's tissue which covers an underlying artery.
The semiconductor assembly is placed in close proximity to and spaced apart from the diaphragm for directly irradiating the diaphragm with electromagnetic radiation and receiving a portion of the electromagnetic radiation which is reflected from the continuous diaphragm. The disclosed system also utilizes a technique for minimizing the system errors associated with temperature drift and aging of the sensor.
The semiconductor assembly is placed in close proximity to and spaced apart from the diaphragm for directly irradiating the diaphragm with electromagnetic radiation and receiving a portion of the electromagnetic radiation which is reflected from the continuous diaphragm. The disclosed system also utilizes a technique for minimizing the system errors associated with temperature drift and aging of the sensor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US621,165 | 1990-11-30 | ||
US07/621,165 US5158091A (en) | 1990-11-30 | 1990-11-30 | Tonometry system for determining blood pressure |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2055850A1 true CA2055850A1 (en) | 1992-05-31 |
CA2055850C CA2055850C (en) | 2001-08-14 |
Family
ID=24489012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002055850A Expired - Fee Related CA2055850C (en) | 1990-11-30 | 1991-11-19 | Tonometry system for determining blood pressure |
Country Status (7)
Country | Link |
---|---|
US (2) | US5158091A (en) |
JP (2) | JPH06292659A (en) |
CA (1) | CA2055850C (en) |
DE (1) | DE4139171A1 (en) |
ES (1) | ES2081733B1 (en) |
FR (1) | FR2669819B1 (en) |
GB (1) | GB2250816B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LT4368B (en) | 1994-12-22 | 1998-08-25 | Biochem Pharma Inc. | Low molecular weight bicyclic thrombin inhibitors |
US6057314A (en) * | 1995-12-21 | 2000-05-02 | Biochem Pharma Inc. | Low molecular weight bicyclic thrombin inhibitors |
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US5372136A (en) * | 1990-10-06 | 1994-12-13 | Noninvasive Medical Technology Corporation | System and method for noninvasive hematocrit monitoring |
US6725072B2 (en) * | 1990-10-06 | 2004-04-20 | Hema Metrics, Inc. | Sensor for transcutaneous measurement of vascular access blood flow |
US5351686A (en) * | 1990-10-06 | 1994-10-04 | In-Line Diagnostics Corporation | Disposable extracorporeal conduit for blood constituent monitoring |
US6681128B2 (en) | 1990-10-06 | 2004-01-20 | Hema Metrics, Inc. | System for noninvasive hematocrit monitoring |
US6266546B1 (en) | 1990-10-06 | 2001-07-24 | In-Line Diagnostics Corporation | System for noninvasive hematocrit monitoring |
US6246894B1 (en) | 1993-02-01 | 2001-06-12 | In-Line Diagnostics Corporation | System and method for measuring blood urea nitrogen, blood osmolarity, plasma free hemoglobin and tissue water content |
US5158091A (en) * | 1990-11-30 | 1992-10-27 | Ivac Corporation | Tonometry system for determining blood pressure |
US5263484A (en) * | 1992-02-13 | 1993-11-23 | Ivac Corporation | Method of determining which portion of a stress sensor is best positioned for use in determining intra-arterial blood pressure |
US5261412A (en) * | 1992-11-20 | 1993-11-16 | Ivac Corporation | Method of continuously monitoring blood pressure |
US5797850A (en) | 1993-11-09 | 1998-08-25 | Medwave, Inc. | Method and apparatus for calculating blood pressure of an artery |
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-
1990
- 1990-11-30 US US07/621,165 patent/US5158091A/en not_active Expired - Lifetime
-
1991
- 1991-11-19 CA CA002055850A patent/CA2055850C/en not_active Expired - Fee Related
- 1991-11-27 ES ES09102649A patent/ES2081733B1/en not_active Expired - Lifetime
- 1991-11-28 GB GB9125385A patent/GB2250816B/en not_active Expired - Fee Related
- 1991-11-28 FR FR9114719A patent/FR2669819B1/en not_active Expired - Fee Related
- 1991-11-28 DE DE4139171A patent/DE4139171A1/en not_active Withdrawn
- 1991-11-29 JP JP3356135A patent/JPH06292659A/en active Pending
-
1992
- 1992-10-16 US US07/962,364 patent/US5284150A/en not_active Expired - Lifetime
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2002
- 2002-03-11 JP JP2002066014A patent/JP2002330931A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LT4368B (en) | 1994-12-22 | 1998-08-25 | Biochem Pharma Inc. | Low molecular weight bicyclic thrombin inhibitors |
US6057314A (en) * | 1995-12-21 | 2000-05-02 | Biochem Pharma Inc. | Low molecular weight bicyclic thrombin inhibitors |
Also Published As
Publication number | Publication date |
---|---|
GB2250816A (en) | 1992-06-17 |
FR2669819B1 (en) | 1998-05-07 |
JPH06292659A (en) | 1994-10-21 |
US5158091A (en) | 1992-10-27 |
FR2669819A1 (en) | 1992-06-05 |
ES2081733R (en) | 1996-04-16 |
GB2250816B (en) | 1994-09-14 |
DE4139171A1 (en) | 1992-06-04 |
ES2081733A2 (en) | 1996-03-01 |
GB9125385D0 (en) | 1992-01-29 |
JP2002330931A (en) | 2002-11-19 |
US5284150A (en) | 1994-02-08 |
ES2081733B1 (en) | 1996-11-16 |
CA2055850C (en) | 2001-08-14 |
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