GB1432316A - Plethysmographs - Google Patents
PlethysmographsInfo
- Publication number
- GB1432316A GB1432316A GB1587974A GB1587974A GB1432316A GB 1432316 A GB1432316 A GB 1432316A GB 1587974 A GB1587974 A GB 1587974A GB 1587974 A GB1587974 A GB 1587974A GB 1432316 A GB1432316 A GB 1432316A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- output
- differentiator
- proportional
- plethysmograph
- 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.)
- Expired
Links
- 230000000747 cardiac effect Effects 0.000 abstract 2
- 210000000038 chest Anatomy 0.000 abstract 2
- 239000008280 blood Substances 0.000 abstract 1
- 210000004369 blood Anatomy 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000002685 pulmonary effect Effects 0.000 abstract 1
- 230000029058 respiratory gaseous exchange 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
- A61B5/026—Measuring blood flow
- A61B5/0295—Measuring blood flow using plethysmography, i.e. measuring the variations in the volume of a body part as modified by the circulation of blood therethrough, e.g. impedance plethysmography
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0535—Impedance plethysmography
-
- 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
- A61B5/7235—Details of waveform analysis
- A61B5/7239—Details of waveform analysis using differentiation including higher order derivatives
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- Molecular Biology (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Animal Behavior & Ethology (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Surgery (AREA)
- Physiology (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Signal Processing (AREA)
- Artificial Intelligence (AREA)
- Psychiatry (AREA)
- Hematology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Cardiology (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
1432316 Plethysmograph for measuring cardiac output M ASRICAN 10 April 1974 [19 April 1973] 15879/74 Heading G1N(E) In a plethysmograph for measuring cardiac (blood volume) output, the voltage (due to a source 10 of alternating constant current connected to electrodes 11 and 12) picked up by a pair of electrodes 14 and 15 is fed via an amplifier 5 to a detector 16 whose output is connected to a digital indicator 17 to provide a read-out corresponding to the base impedance Zo of the thorax. The detectors output is also applied to an amplifier 20 and to a differentiator and filter circuit 22 by way of a gate circuit 23. The gate circuit interrupts the signal to the differentiator circuit when the output of amplifier 20 exceeds a predetermined value (to mitigate the effects of breathing in the measurement outputs). The output of the amplifier 20 is proportional to the rate of change of impedance #Z of the thorax from base level, and the output of the differentiator 22 provides a signal proportional to <SP>d2</SP>/dt which is directly proportional to the pulmonary flow-rate. The amplifier 20 may be in the form of a differential amplifier whose other input is derived from the oscillator 10 via a detector 32. The outputs of the amplifier 20 and the differentiator 22 may be calibrated with the aid of a calibration generator 40. The description also discloses examples of typical waveforms, Figs. 3 and 4 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US352426A US3874368A (en) | 1973-04-19 | 1973-04-19 | Impedance plethysmograph having blocking system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1432316A true GB1432316A (en) | 1976-04-14 |
Family
ID=23385086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1587974A Expired GB1432316A (en) | 1973-04-19 | 1974-04-10 | Plethysmographs |
Country Status (5)
Country | Link |
---|---|
US (1) | US3874368A (en) |
JP (1) | JPS501582A (en) |
DE (1) | DE2349624A1 (en) |
FR (1) | FR2226144B3 (en) |
GB (1) | GB1432316A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9271676B2 (en) | 2001-03-23 | 2016-03-01 | Delfin Technologies Ltd. | Method for measuring of edema |
Families Citing this family (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3996925A (en) * | 1975-05-05 | 1976-12-14 | Ljubomir Djordjevich | System for determining characteristics of blood flow |
US4016868A (en) * | 1975-11-25 | 1977-04-12 | Allison Robert D | Garment for impedance plethysmograph use |
US4059169A (en) * | 1976-02-09 | 1977-11-22 | Hagen Winston H | Monitor for biological volume changes |
US4328809A (en) * | 1976-09-24 | 1982-05-11 | Barry Herbert Hirschowitz | Device and method for detecting the potential level of the electromagnetic field of a living organism |
US4182314A (en) * | 1977-07-11 | 1980-01-08 | Boughton Morris W | Multi-channel vascular flow monitoring system |
JPS5441584A (en) * | 1977-09-07 | 1979-04-02 | Asahi Medical Co | Human body blood current meter |
CA1196691A (en) * | 1982-01-12 | 1985-11-12 | Bradley Fry | Reconstruction system and methods for impedance imaging |
EP0151689B1 (en) * | 1984-02-07 | 1990-12-27 | SCHIAPPARELLI MEDTRONIC S.p.A. | Minute ventilation dependent rate responsive pacer |
GB8428831D0 (en) * | 1984-11-15 | 1984-12-27 | Sutton J A | Monitoring organs of body |
US4911175A (en) * | 1987-09-17 | 1990-03-27 | Diana Twyman | Method for measuring total body cell mass and total extracellular mass by bioelectrical resistance and reactance |
US5063937A (en) * | 1990-09-12 | 1991-11-12 | Wright State University | Multiple frequency bio-impedance measurement system |
US5309917A (en) * | 1991-09-12 | 1994-05-10 | Drexel University | System and method of impedance cardiography and heartbeat determination |
US5423326A (en) * | 1991-09-12 | 1995-06-13 | Drexel University | Apparatus and method for measuring cardiac output |
DE4225958A1 (en) * | 1992-06-01 | 1993-12-02 | Medis Medizinische Mestechnik | Medical electronics armband electrode with fleece strap - measures impedance of patient's body section using ring as fixed loop |
DE4231602B4 (en) * | 1992-09-17 | 2004-11-04 | Biotronik Meß- und Therapiegeräte GmbH & Co. Ingenieurbüro Berlin | Circuit for measuring the impedance in the heart |
US5685318A (en) * | 1995-09-29 | 1997-11-11 | Siemens Medical Systems, Inc. | Method and apparatus for detecting quick movement artifact in impedance respiration signals |
US5749369A (en) | 1996-08-09 | 1998-05-12 | R.S. Medical Monitoring Ltd. | Method and device for stable impedance plethysmography |
US5732710A (en) * | 1996-08-09 | 1998-03-31 | R.S. Medical Monitoring Ltd. | Method and device for stable impedance plethysmography |
EP2324761A3 (en) * | 2000-04-17 | 2014-06-18 | Adidas AG | Systems and methods for ambulatory monitoring of physiological signals |
US20080082018A1 (en) * | 2003-04-10 | 2008-04-03 | Sackner Marvin A | Systems and methods for respiratory event detection |
CA2525443C (en) * | 2003-05-12 | 2013-12-17 | Cheetah Medical Inc. | System, method and apparatus for measuring blood flow and blood volume |
AU2005228117A1 (en) * | 2004-03-24 | 2005-10-13 | Noninvasive Medical Technologies, Llc | Thoracic impedance monitor and electrode array and method of use |
US9492084B2 (en) | 2004-06-18 | 2016-11-15 | Adidas Ag | Systems and methods for monitoring subjects in potential physiological distress |
US9504410B2 (en) * | 2005-09-21 | 2016-11-29 | Adidas Ag | Band-like garment for physiological monitoring |
DK1848326T3 (en) * | 2005-02-15 | 2017-02-13 | Cheetah Medical Inc | SYSTEM, METHOD AND APPARATUS FOR MEASURING BLOOD FLOW AND BLOOD VOLUME |
AU2006236306A1 (en) * | 2005-04-20 | 2006-10-26 | Vivometrics, Inc. | Systems and methods for non-invasive physiological monitoring of non-human animals |
EP1887933B1 (en) | 2005-05-20 | 2017-01-18 | Adidas AG | Methods and systems for determining dynamic hyperinflation |
US8033996B2 (en) * | 2005-07-26 | 2011-10-11 | Adidas Ag | Computer interfaces including physiologically guided avatars |
US8762733B2 (en) * | 2006-01-30 | 2014-06-24 | Adidas Ag | System and method for identity confirmation using physiologic biometrics to determine a physiologic fingerprint |
US20070270671A1 (en) * | 2006-04-10 | 2007-11-22 | Vivometrics, Inc. | Physiological signal processing devices and associated processing methods |
US8475387B2 (en) * | 2006-06-20 | 2013-07-02 | Adidas Ag | Automatic and ambulatory monitoring of congestive heart failure patients |
WO2008055078A2 (en) * | 2006-10-27 | 2008-05-08 | Vivometrics, Inc. | Identification of emotional states using physiological responses |
US9095271B2 (en) * | 2007-08-13 | 2015-08-04 | Cheetah Medical, Inc. | Dynamically variable filter |
US8876725B2 (en) * | 2007-02-23 | 2014-11-04 | Cheetah Medical, Inc. | Method and system for estimating exercise capacity |
WO2008107899A1 (en) * | 2007-03-07 | 2008-09-12 | Cheetah Medical Ltd. | Method and system for monitoring sleep |
CA2683684C (en) * | 2007-04-19 | 2016-02-02 | Cheetah Medical Ltd. | Method, apparatus and system for predicting electromechanical dissociation |
EP2194847A1 (en) | 2007-09-14 | 2010-06-16 | Corventis, Inc. | Adherent device with multiple physiological sensors |
EP2194864B1 (en) | 2007-09-14 | 2018-08-29 | Medtronic Monitoring, Inc. | System and methods for wireless body fluid monitoring |
US20090076343A1 (en) | 2007-09-14 | 2009-03-19 | Corventis, Inc. | Energy Management for Adherent Patient Monitor |
WO2009036327A1 (en) | 2007-09-14 | 2009-03-19 | Corventis, Inc. | Adherent device for respiratory monitoring and sleep disordered breathing |
US8460189B2 (en) | 2007-09-14 | 2013-06-11 | Corventis, Inc. | Adherent cardiac monitor with advanced sensing capabilities |
US8897868B2 (en) | 2007-09-14 | 2014-11-25 | Medtronic, Inc. | Medical device automatic start-up upon contact to patient tissue |
US8684925B2 (en) | 2007-09-14 | 2014-04-01 | Corventis, Inc. | Injectable device for physiological monitoring |
WO2009114548A1 (en) | 2008-03-12 | 2009-09-17 | Corventis, Inc. | Heart failure decompensation prediction based on cardiac rhythm |
WO2009146214A1 (en) | 2008-04-18 | 2009-12-03 | Corventis, Inc. | Method and apparatus to measure bioelectric impedance of patient tissue |
US20090292194A1 (en) * | 2008-05-23 | 2009-11-26 | Corventis, Inc. | Chiropractic Care Management Systems and Methods |
US8790259B2 (en) | 2009-10-22 | 2014-07-29 | Corventis, Inc. | Method and apparatus for remote detection and monitoring of functional chronotropic incompetence |
US9451897B2 (en) | 2009-12-14 | 2016-09-27 | Medtronic Monitoring, Inc. | Body adherent patch with electronics for physiologic monitoring |
US8965498B2 (en) | 2010-04-05 | 2015-02-24 | Corventis, Inc. | Method and apparatus for personalized physiologic parameters |
US9317660B2 (en) | 2011-03-31 | 2016-04-19 | Adidas Ag | Group performance monitoring system and method |
US9767257B2 (en) | 2011-03-31 | 2017-09-19 | Adidas Ag | Group performance monitoring system and method |
US8818478B2 (en) | 2011-03-31 | 2014-08-26 | Adidas Ag | Sensor garment |
US9141759B2 (en) | 2011-03-31 | 2015-09-22 | Adidas Ag | Group performance monitoring system and method |
CN102551714A (en) * | 2012-02-21 | 2012-07-11 | 大连理工大学 | Electrical impedance detector for artery endothelial functions of arteries and method |
US10478668B2 (en) | 2014-11-24 | 2019-11-19 | Adidas Ag | Activity monitoring base station |
FR3040283B1 (en) * | 2015-08-28 | 2021-12-17 | Univ Grenoble 1 | DEVICE AND METHOD FOR NON-INVASIVE MEASUREMENT OF THE SUBDIAPHRAGMATIC AORTIC FLOW IN A SMALL LABORATORY MAMMAL |
US11051940B2 (en) | 2017-09-07 | 2021-07-06 | Edwards Lifesciences Corporation | Prosthetic spacer device for heart valve |
US10945844B2 (en) | 2018-10-10 | 2021-03-16 | Edwards Lifesciences Corporation | Heart valve sealing devices and delivery devices therefor |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3171892A (en) * | 1961-06-27 | 1965-03-02 | Pantle Jorge Oltvani | Electronic apparatus for the observation of signals of biological origin |
BE788620A (en) * | 1971-09-29 | 1973-01-02 | Humetrics Corp | METHOD AND APPARATUS FOR THE AUTOMATIC ANALYSIS OF BRAIN WAVE SIGNALS |
-
1973
- 1973-04-19 US US352426A patent/US3874368A/en not_active Expired - Lifetime
- 1973-08-17 JP JP48092344A patent/JPS501582A/ja active Pending
- 1973-10-03 DE DE19732349624 patent/DE2349624A1/en active Pending
-
1974
- 1974-04-10 GB GB1587974A patent/GB1432316A/en not_active Expired
- 1974-04-18 FR FR7413540A patent/FR2226144B3/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9271676B2 (en) | 2001-03-23 | 2016-03-01 | Delfin Technologies Ltd. | Method for measuring of edema |
Also Published As
Publication number | Publication date |
---|---|
FR2226144A1 (en) | 1974-11-15 |
DE2349624A1 (en) | 1974-11-14 |
JPS501582A (en) | 1975-01-09 |
FR2226144B3 (en) | 1977-04-22 |
US3874368A (en) | 1975-04-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |