GB1432316A - Plethysmographs - Google Patents

Plethysmographs

Info

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
Application number
GB1587974A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ASRICAN M
Original Assignee
ASRICAN M
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ASRICAN M filed Critical ASRICAN M
Publication of GB1432316A publication Critical patent/GB1432316A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—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).
GB1587974A 1973-04-19 1974-04-10 Plethysmographs Expired GB1432316A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9271676B2 (en) 2001-03-23 2016-03-01 Delfin Technologies Ltd. Method for measuring of edema

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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

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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

Cited By (1)

* Cited by examiner, † Cited by third party
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