CA2251250A1 - Non-invasive monitoring of hemodynamic parameters using impedance cardiography - Google Patents

Non-invasive monitoring of hemodynamic parameters using impedance cardiography

Info

Publication number
CA2251250A1
CA2251250A1 CA002251250A CA2251250A CA2251250A1 CA 2251250 A1 CA2251250 A1 CA 2251250A1 CA 002251250 A CA002251250 A CA 002251250A CA 2251250 A CA2251250 A CA 2251250A CA 2251250 A1 CA2251250 A1 CA 2251250A1
Authority
CA
Canada
Prior art keywords
signals
bioimpedance
employed
cardiac output
stroke volume
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
Application number
CA002251250A
Other languages
French (fr)
Other versions
CA2251250C (en
Inventor
Sergei I. Schookin
Viatcheslav G. Zubenko
Konstantin R. Beliaev
Aleksandr A. Morozov
Wen H. Yong
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.)
Rheo Graphic Pte Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2251250A1 publication Critical patent/CA2251250A1/en
Application granted granted Critical
Publication of CA2251250C publication Critical patent/CA2251250C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/0809—Detecting, measuring or recording devices for evaluating the respiratory organs by impedance pneumography
    • 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
    • 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
    • A61B5/7253—Details of waveform analysis characterised by using transforms
    • A61B5/7257—Details of waveform analysis characterised by using transforms using Fourier transforms

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Public Health (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Physiology (AREA)
  • Hematology (AREA)
  • Pulmonology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Psychiatry (AREA)
  • Signal Processing (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)

Abstract

A method and apparatus for determination of heart rate, heart stroke volume, and cardiac output from thoracic bioimpedance signals and electrocardiograms. A unique bioimpedance electrode arrangement is employed, and the bioimpedance signals are corrected for gain phase-frequency distortion through the use of sinusoidal test signals through the measuring or detection electrodes to identify distortions and correct for same during actual measurements. Time-derivative bioimpedance signals are employed, the power spectrum calculated, and a novel autoconvolution procedure used to emphasize the heart rate harmonic. Breath waves and other signals not indicative of the patient's cardiocycles are removed. Left ventricular ejection time is derived from the bioimpedance signals, and an improved version of Kubicek's equation is employed to derive heart stroke volume and thus cardiac output.
CA002251250A 1996-04-08 1997-04-07 Non-invasive monitoring of hemodynamic parameters using impedance cardiography Expired - Fee Related CA2251250C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/629,420 US5685316A (en) 1996-04-08 1996-04-08 Non-invasive monitoring of hemodynamic parameters using impedance cardiography
US629,420 1996-04-08
PCT/SG1997/000013 WO1997037591A1 (en) 1996-04-08 1997-04-07 Non-invasive monitoring of hemodynamic parameters using impedance cardiography

Publications (2)

Publication Number Publication Date
CA2251250A1 true CA2251250A1 (en) 1997-10-16
CA2251250C CA2251250C (en) 2004-06-29

Family

ID=24522916

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002251250A Expired - Fee Related CA2251250C (en) 1996-04-08 1997-04-07 Non-invasive monitoring of hemodynamic parameters using impedance cardiography

Country Status (8)

Country Link
US (2) US5685316A (en)
EP (2) EP0901342A1 (en)
JP (1) JP3486419B2 (en)
CN (1) CN1221325A (en)
AU (1) AU748652B2 (en)
CA (1) CA2251250C (en)
RU (1) RU2195168C2 (en)
WO (1) WO1997037591A1 (en)

Families Citing this family (154)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1001282C2 (en) * 1995-09-26 1997-03-28 A J Van Liebergen Holding B V Stroke volume determination device for a human heart.
US6002952A (en) 1997-04-14 1999-12-14 Masimo Corporation Signal processing apparatus and method
US6520917B1 (en) * 1997-12-04 2003-02-18 Horst Erhard Kunig Method and apparatus for measuring functionality of a periodically changing system
EP0925756B8 (en) * 1997-12-25 2008-08-13 Nihon Kohden Corporation Biological signal transmission apparatus
US6007491A (en) * 1998-02-06 1999-12-28 Southwest Research Institute Cardiac output monitor using fuzzy logic blood pressure analysis
AUPP711998A0 (en) * 1998-11-13 1998-12-10 Micromedical Industries Limited Wrist mountable monitor
NL1012223C2 (en) * 1999-06-03 2000-12-06 Martil Instr B V Cardiac pacemaker as well as pacemaker unit and electric wire therefor.
AUPQ113799A0 (en) 1999-06-22 1999-07-15 University Of Queensland, The A method and device for measuring lymphoedema
FI110405B (en) * 1999-07-08 2003-01-31 Instrumentarium Oy A method for continuously monitoring heart rate
US20040039419A1 (en) 1999-09-30 2004-02-26 Stickney Ronald E. Apparatus, software, and methods for cardiac pulse detection using a piezoelectric sensor
US20030109790A1 (en) * 2001-12-06 2003-06-12 Medtronic Physio-Control Manufacturing Corp. Pulse detection method and apparatus using patient impedance
US9248306B2 (en) 1999-09-30 2016-02-02 Physio-Control, Inc. Pulse detection apparatus, software, and methods using patient physiological signals
US6440082B1 (en) 1999-09-30 2002-08-27 Medtronic Physio-Control Manufacturing Corp. Method and apparatus for using heart sounds to determine the presence of a pulse
US6322514B1 (en) 2000-03-13 2001-11-27 Instrumentarium Corporation Method for determining cardiac characteristics of subject
US6522914B1 (en) * 2000-07-14 2003-02-18 Cardiac Pacemakers, Inc. Method and apparatuses for monitoring hemodynamic activities using an intracardiac impedance-derived parameter
US6615077B1 (en) * 2000-08-14 2003-09-02 Renal Research Institute, Llc Device and method for monitoring and controlling physiologic parameters of a dialysis patient using segmental bioimpedence
US7069070B2 (en) * 2003-05-12 2006-06-27 Cardiac Pacemakers, Inc. Statistical method for assessing autonomic balance
US6589267B1 (en) * 2000-11-10 2003-07-08 Vasomedical, Inc. High efficiency external counterpulsation apparatus and method for controlling same
US6511438B2 (en) 2001-04-03 2003-01-28 Osypka Medical Gmbh Apparatus and method for determining an approximation of the stroke volume and the cardiac output of the heart
US6912420B2 (en) * 2001-04-10 2005-06-28 Cardiac Pacemakers, Inc. Cardiac rhythm management system for hypotension
US6907288B2 (en) * 2001-04-10 2005-06-14 Cardiac Pacemakers, Inc. Cardiac rhythm management system adjusting rate response factor for treating hypotension
DE10125359B4 (en) * 2001-05-23 2005-07-28 Osypka Medical Gmbh An AC power source for generating an AC current to be transmitted through the body and a method of generating a stable AC current
WO2003003920A2 (en) * 2001-07-05 2003-01-16 Gennady Gedevanishvili Method and device for non-invasive research of blood distribution and its circulatory characteristics in warm-blooded organism
US6625487B2 (en) 2001-07-17 2003-09-23 Koninklijke Philips Electronics N.V. Bioelectrical impedance ECG measurement and defibrillator implementing same
US7191000B2 (en) * 2001-07-31 2007-03-13 Cardiac Pacemakers, Inc. Cardiac rhythm management system for edema
US7822470B2 (en) * 2001-10-11 2010-10-26 Osypka Medical Gmbh Method for determining the left-ventricular ejection time TLVE of a heart of a subject
CA2407579C (en) 2001-10-11 2012-12-11 Markus J. Osypka Calibration of a doppler velocimeter for stroke volume determination
US20050004767A1 (en) * 2003-04-30 2005-01-06 Green Sol F. Method and system for validating changes in medical practice, procedures and product choice
ATE342752T1 (en) * 2002-04-03 2006-11-15 Osypka Medical Gmbh APPARATUS FOR AUTOMATICALLY DETERMINING HEMODYNAMIC OPTIMUM CARDIAC STIMULATION PARAMETERS VALUES
US6887239B2 (en) * 2002-04-17 2005-05-03 Sontra Medical Inc. Preparation for transmission and reception of electrical signals
US20030233118A1 (en) * 2002-06-13 2003-12-18 Hui John C. K. Method for treating congestive heart failure using external counterpulsation
US7048702B2 (en) 2002-06-13 2006-05-23 Vasomedical, Inc. External counterpulsation and method for minimizing end diastolic pressure
US7092757B2 (en) 2002-07-12 2006-08-15 Cardiac Pacemakers, Inc. Minute ventilation sensor with dynamically adjusted excitation current
EP1388321A1 (en) 2002-08-09 2004-02-11 Instrumentarium Oyj Method and system for continuous and non-invasive blood pressure measurement
US20040039420A1 (en) * 2002-08-26 2004-02-26 Medtronic Physio-Control Manufacturing Corp. Apparatus, software, and methods for cardiac pulse detection using accelerometer data
US20040116969A1 (en) 2002-08-26 2004-06-17 Owen James M. Pulse detection using patient physiological signals
US7101339B2 (en) 2002-12-13 2006-09-05 Cardiac Pacemakers, Inc. Respiration signal measurement apparatus, systems, and methods
US7043293B1 (en) 2002-12-24 2006-05-09 Cardiodynamics International Corporation Method and apparatus for waveform assessment
US7272442B2 (en) 2002-12-30 2007-09-18 Cardiac Pacemakers, Inc. Automatically configurable minute ventilation sensor
US8050764B2 (en) 2003-10-29 2011-11-01 Cardiac Pacemakers, Inc. Cross-checking of transthoracic impedance and acceleration signals
CN1767784A (en) * 2003-04-03 2006-05-03 日本先锋公司 Living body information detecting device, contact member used therefor, and living body information detecting member-use paint
CA2523678C (en) * 2003-04-30 2022-05-31 Becton, Dickinson And Company Method and system for validating changes in medical practice, procedures and product choice
US7646274B2 (en) 2003-05-01 2010-01-12 Uri Rapoport Apparatus and method for non-invasive measurement of cardiac output
EP1622508B1 (en) * 2003-05-12 2014-04-09 Cheetah Medical, Inc. System and method for measuring blood flow and blood volume
US20070197905A1 (en) * 2003-05-21 2007-08-23 Holger Timinger Apparatus and method for navigating a catheter
US7200440B2 (en) * 2003-07-02 2007-04-03 Cardiac Pacemakers, Inc. Cardiac cycle synchronized sampling of impedance signal
US7455643B1 (en) 2003-07-07 2008-11-25 Nellcor Puritan Bennett Ireland Continuous non-invasive blood pressure measurement apparatus and methods providing automatic recalibration
DE10332820B4 (en) * 2003-07-18 2006-07-20 Osypka Medical Gmbh Device for electrically converting a first voltage into a second voltage for measuring impedances and admittances on biological tissues
US8682424B2 (en) * 2003-07-31 2014-03-25 Dst Delta Segments Technology, Inc. Noninvasive multi-channel monitoring of hemodynamic parameters
US7392084B2 (en) 2003-09-23 2008-06-24 Cardiac Pacemakers, Inc. Demand-based cardiac function therapy
US7572226B2 (en) 2003-10-28 2009-08-11 Cardiac Pacemakers, Inc. System and method for monitoring autonomic balance and physical activity
US7806830B2 (en) * 2004-06-16 2010-10-05 Cordeus, Inc. Apparatus and method for determination of stroke volume using the brachial artery
US7261697B2 (en) * 2004-06-16 2007-08-28 Bernstein Donald P Apparatus for determination of stroke volume using the brachial artery
US8068906B2 (en) 2004-06-21 2011-11-29 Aorora Technologies Pty Ltd Cardiac monitoring system
US7387610B2 (en) 2004-08-19 2008-06-17 Cardiac Pacemakers, Inc. Thoracic impedance detection with blood resistivity compensation
US9820658B2 (en) 2006-06-30 2017-11-21 Bao Q. Tran Systems and methods for providing interoperability among healthcare devices
US20060111641A1 (en) * 2004-11-19 2006-05-25 Applied Cardiac Systems, Inc. System and method for ICG recording and analysis
US7570989B2 (en) * 2004-11-22 2009-08-04 Cardiodynamics International Corporation Method and apparatus for signal assessment including event rejection
EP1848326B1 (en) * 2005-02-15 2016-11-16 Cheetah Medical, Inc. System, method and apparatus for measuring blood flow and blood volume
US7603170B2 (en) 2005-04-26 2009-10-13 Cardiac Pacemakers, Inc. Calibration of impedance monitoring of respiratory volumes using thoracic D.C. impedance
US7907997B2 (en) 2005-05-11 2011-03-15 Cardiac Pacemakers, Inc. Enhancements to the detection of pulmonary edema when using transthoracic impedance
US9089275B2 (en) 2005-05-11 2015-07-28 Cardiac Pacemakers, Inc. Sensitivity and specificity of pulmonary edema detection when using transthoracic impedance
US7340296B2 (en) 2005-05-18 2008-03-04 Cardiac Pacemakers, Inc. Detection of pleural effusion using transthoracic impedance
GB0511289D0 (en) 2005-06-03 2005-07-13 Sheffield Teaching Hospitals Method and probe for measuring the impedance of human or animal body tissue
AU2006265763B2 (en) 2005-07-01 2012-08-09 Impedimed Limited Monitoring system
EP2449964B1 (en) 2005-07-01 2016-08-10 Impedimed Limited Connector for Impedance Measurement System
US8781551B2 (en) 2005-07-01 2014-07-15 Impedimed Limited Apparatus for connecting impedance measurement apparatus to an electrode
EP1754441B1 (en) * 2005-08-17 2008-01-09 Osypka Medical GmbH Method and apparatus for digital demodulation in the measurement of electrical bioimpedance or bioadmittance
JP4752673B2 (en) * 2005-10-06 2011-08-17 コニカミノルタセンシング株式会社 Pulse wave data analysis method, system, program
ES2476999T3 (en) 2005-10-11 2014-07-15 Impedimed Limited Hydration Status Monitoring
US20070179387A1 (en) * 2006-01-27 2007-08-02 Kunig Horst E Method and apparatus for measuring reserves of a periodically changing system
US20090132201A1 (en) * 2006-01-27 2009-05-21 Horst Erhard Kunig Method and apparatus for measuring performance of a periodically changing system accomplishing a task
US8323189B2 (en) 2006-05-12 2012-12-04 Bao Tran Health monitoring appliance
US7558622B2 (en) * 2006-05-24 2009-07-07 Bao Tran Mesh network stroke monitoring appliance
US9060683B2 (en) 2006-05-12 2015-06-23 Bao Tran Mobile wireless appliance
US7539532B2 (en) 2006-05-12 2009-05-26 Bao Tran Cuffless blood pressure monitoring appliance
US8968195B2 (en) 2006-05-12 2015-03-03 Bao Tran Health monitoring appliance
US7539533B2 (en) * 2006-05-16 2009-05-26 Bao Tran Mesh network monitoring appliance
EP2020918B1 (en) 2006-05-30 2015-05-20 Impedimed Limited Impedance measurements
US7569019B2 (en) * 2006-06-16 2009-08-04 Frank Bour Analysis and use of cardiographic bioimpedance measurements
CA2670293C (en) 2006-11-30 2017-01-03 Impedimed Limited Measurement apparatus
DE102006057987A1 (en) * 2006-12-08 2008-06-19 Siemens Ag Apparatus and method for imaging
US7846104B2 (en) * 2007-02-08 2010-12-07 Heart Force Medical Inc. Monitoring physiological condition and detecting abnormalities
US8876725B2 (en) * 2007-02-23 2014-11-04 Cheetah Medical, Inc. Method and system for estimating exercise capacity
US9095271B2 (en) 2007-08-13 2015-08-04 Cheetah Medical, Inc. Dynamically variable filter
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
EP2148613B9 (en) 2007-04-20 2014-12-10 Impedimed Limited Monitoring system and probe
EP2144670B9 (en) * 2007-04-27 2014-11-19 St. Jude Medical AB Implantable medical device for monitoring valve movements of a heart
CN100571612C (en) * 2007-07-13 2009-12-23 深圳迪美泰数字医学技术有限公司 The pure digital medical amplifier that is used for clinical or non-clinical bio signal record
CA2707419A1 (en) 2007-08-09 2009-02-12 Impedimed Limited Impedance measurement process
US8115472B2 (en) * 2007-10-24 2012-02-14 Kirsen Technologies Corporation Inc. System and method for space control and remote monitoring
EP2087836B1 (en) * 2008-02-07 2012-04-04 Pulsion Medical Systems AG Apparatus and method for determining a physiological parameter
WO2009101626A2 (en) * 2008-02-14 2009-08-20 N.I. Medical Ltd. Method and system for use in monitoring left ventricular dysfunction
US8457726B2 (en) 2008-04-29 2013-06-04 St. Jude Medical, AB Heart failure detecting medical device
US8398556B2 (en) 2008-06-30 2013-03-19 Covidien Lp Systems and methods for non-invasive continuous blood pressure determination
US8660799B2 (en) 2008-06-30 2014-02-25 Nellcor Puritan Bennett Ireland Processing and detecting baseline changes in signals
US8506498B2 (en) 2008-07-15 2013-08-13 Nellcor Puritan Bennett Ireland Systems and methods using induced perturbation to determine physiological parameters
CZ306759B6 (en) 2008-08-05 2017-06-21 Univerzita Karlova v Praze, Lékařská fakulta v Plzni A diagnostic system for detection and monitoring of chest bioimpedance and determination of emergent chest conditions
CN102159132B (en) 2008-09-22 2015-11-25 奇塔医疗公司 For determining the system and method for blood flow
US9687161B2 (en) 2008-09-30 2017-06-27 Nellcor Puritan Bennett Ireland Systems and methods for maintaining blood pressure monitor calibration
US9301697B2 (en) 2008-09-30 2016-04-05 Nellcor Puritan Bennett Ireland Systems and methods for recalibrating a non-invasive blood pressure monitor
US9314168B2 (en) 2008-09-30 2016-04-19 Nellcor Puritan Bennett Ireland Detecting sleep events using localized blood pressure changes
US8532751B2 (en) 2008-09-30 2013-09-10 Covidien Lp Laser self-mixing sensors for biological sensing
US9615766B2 (en) 2008-11-28 2017-04-11 Impedimed Limited Impedance measurement process
CZ2008802A3 (en) * 2008-12-15 2010-06-23 Ústav prístrojové techniky AV CR, v.v.i. Apparatus to measure blood flow properties and method for connecting thereof
US8216136B2 (en) 2009-03-05 2012-07-10 Nellcor Puritan Bennett Llc Systems and methods for monitoring heart rate and blood pressure correlation
US9314180B2 (en) * 2009-05-05 2016-04-19 Siemens Medical Solutions Usa, Inc. Heart electrophysiological signal analysis system
US20100292584A1 (en) * 2009-05-15 2010-11-18 Chih-Hsin Lee Spectrum analytical method for quantifying heat-lung interaction
US8290730B2 (en) 2009-06-30 2012-10-16 Nellcor Puritan Bennett Ireland Systems and methods for assessing measurements in physiological monitoring devices
US9198582B2 (en) 2009-06-30 2015-12-01 Nellcor Puritan Bennett Ireland Determining a characteristic physiological parameter
US8628477B2 (en) 2009-07-31 2014-01-14 Nellcor Puritan Bennett Ireland Systems and methods for non-invasive determination of blood pressure
AT508114B1 (en) 2009-09-03 2010-11-15 Heller Arnulf Dipl Ing DEVICE FOR NON-INVASIVE DETERMINATION OF ARTERIAL BLOOD PRESSURE
US9220440B2 (en) 2009-09-21 2015-12-29 Nellcor Puritan Bennett Ireland Determining a characteristic respiration rate
US9066660B2 (en) 2009-09-29 2015-06-30 Nellcor Puritan Bennett Ireland Systems and methods for high-pass filtering a photoplethysmograph signal
US8463347B2 (en) 2009-09-30 2013-06-11 Nellcor Puritan Bennett Ireland Systems and methods for normalizing a plethysmograph signal for improved feature analysis
US9615767B2 (en) 2009-10-26 2017-04-11 Impedimed Limited Fluid level indicator determination
WO2011060497A1 (en) 2009-11-18 2011-05-26 Impedimed Limited Signal distribution for patient-electrode measurements
US9451887B2 (en) 2010-03-31 2016-09-27 Nellcor Puritan Bennett Ireland Systems and methods for measuring electromechanical delay of the heart
US8898037B2 (en) 2010-04-28 2014-11-25 Nellcor Puritan Bennett Ireland Systems and methods for signal monitoring using Lissajous figures
RU2463952C2 (en) * 2010-09-30 2012-10-20 Общество с ограниченной ответственностью "ТОЧНАЯ ЭЛЕКТРОНИКА" Device of mobile communication with possibility of cardiomonitoring
US8825428B2 (en) 2010-11-30 2014-09-02 Neilcor Puritan Bennett Ireland Methods and systems for recalibrating a blood pressure monitor with memory
US9357934B2 (en) 2010-12-01 2016-06-07 Nellcor Puritan Bennett Ireland Systems and methods for physiological event marking
US9259160B2 (en) 2010-12-01 2016-02-16 Nellcor Puritan Bennett Ireland Systems and methods for determining when to measure a physiological parameter
KR102073221B1 (en) 2011-07-25 2020-02-04 치타 메디컬, 인코퍼레이티드 Method and system for monitoring hemodynamics
US9060695B2 (en) 2011-11-30 2015-06-23 Covidien Lp Systems and methods for determining differential pulse transit time from the phase difference of two analog plethysmographs
EP2790576A4 (en) 2011-12-14 2015-07-08 Intersection Medical Inc Devices, systems and methods for determining the relative spatial change in subsurface resistivities across frequencies in tissue
KR102123045B1 (en) * 2012-04-23 2020-06-16 프레코르디오르 오와이 Method and apparatus for determining information indicative of cardiac malfunctions and abnormalities
UA104073C2 (en) 2012-07-13 2013-12-25 Илья Анатольевич Чайковский Method for diagnosing degree of ischemic lesions of myocardium based on analysis of temporal changes in current density
US9414752B2 (en) 2012-11-09 2016-08-16 Elwha Llc Embolism deflector
US9865176B2 (en) 2012-12-07 2018-01-09 Koninklijke Philips N.V. Health monitoring system
RU2663633C2 (en) * 2012-12-14 2018-08-07 Конинклейке Филипс Н.В. Device for measuring physiological parameter of user
CN103083011B (en) * 2013-01-22 2014-11-05 西安交通大学 Electrocardio R wave crest real-time locating method assisted by chest impedance second order difference image
WO2014140978A1 (en) * 2013-03-14 2014-09-18 Koninklijke Philips N.V. Device and method for obtaining vital sign information of a subject
ES2537351B1 (en) 2013-11-04 2015-12-03 Universidad De Sevilla Intelligent bioimpedance sensor for biomedical applications
CN106163389A (en) * 2014-04-01 2016-11-23 皇家飞利浦有限公司 Central chamber perfusion calculates
CN104000578A (en) * 2014-06-11 2014-08-27 复旦大学 ASIC chip for electrocardiosignal QRS wave real-time detection
KR102299361B1 (en) 2014-09-03 2021-09-07 삼성전자주식회사 Apparatus and method for monitoring blood pressure, wearable device having function of blood pressure monitoring
KR20160047838A (en) * 2014-10-23 2016-05-03 삼성전자주식회사 Method and apparatus for processing bio-signal
DE102014226674A1 (en) * 2014-12-19 2016-06-23 Technische Universität München Method, data processing device, computer program product and data carrier for indexing at least one hemodynamic and / or biochemical parameter of a living being
KR102411658B1 (en) 2015-01-15 2022-06-21 삼성전자주식회사 Apparatus for detecting information of the living body
KR102384225B1 (en) 2015-03-06 2022-04-07 삼성전자주식회사 System and method for sensing blood pressure
US9737223B2 (en) 2015-05-13 2017-08-22 Medtronic, Inc. Determining onset of cardiac depolarization and repolarization waves for signal processing
JP7091071B2 (en) 2015-06-12 2022-06-27 コーニンクレッカ フィリップス エヌ ヴェ Surface EMG inspection system, recorder and method
US9782094B2 (en) * 2015-07-31 2017-10-10 Medtronic, Inc. Identifying ambiguous cardiac signals for electrophysiologic mapping
KR102434701B1 (en) 2015-09-01 2022-08-22 삼성전자주식회사 Apparatus and method for acquiring bio- information and apparatus for detecting bio- information
CN106236091A (en) * 2016-08-30 2016-12-21 苏州品诺维新医疗科技有限公司 A kind of device detecting blood status and judge that electrode is to abnormal method
CN106377259B (en) * 2016-08-30 2019-05-31 苏州涵轩信息科技有限公司 A kind of blood status detection device and the method for obtaining impedance variations value
KR102655671B1 (en) 2016-10-12 2024-04-05 삼성전자주식회사 Apparatus and method for estimating bio-information
US11419539B2 (en) 2017-12-22 2022-08-23 Regents Of The University Of Minnesota QRS onset and offset times and cycle selection using anterior and posterior electrode signals
US11298547B2 (en) * 2018-07-27 2022-04-12 Medtronic, Inc. Fluid status detection from a cardiac electrical signal and impedance signal
RU2718296C1 (en) * 2019-04-15 2020-04-01 федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный медицинский университет" Министерства здравоохранения Российской Федерации (ФГБОУ ВО ОмГМУ Минздрава России) Method of analysing biological objects based on analysis of nonlinear distortions of passing electrical signal
CN112244853B (en) * 2020-10-26 2022-05-13 生物岛实验室 Edge computing node manufacturing method and edge computing node
KR102407355B1 (en) * 2021-02-04 2022-06-10 주식회사 바이랩 Apparatus and method for noninvasively separating air flow and blood flow components and measuring the same

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340867A (en) * 1964-08-19 1967-09-12 Univ Minnesota Impedance plethysmograph
US4016868A (en) * 1975-11-25 1977-04-12 Allison Robert D Garment for impedance plethysmograph use
US4458694A (en) * 1977-11-02 1984-07-10 Yeda Research & Development Co., Ltd. Apparatus and method for detection of tumors in tissue
US4450527A (en) * 1982-06-29 1984-05-22 Bomed Medical Mfg. Ltd. Noninvasive continuous cardiac output monitor
GB8431500D0 (en) * 1984-12-13 1985-01-23 Antec Systems Measurement of thoracic impedances
US4781201A (en) * 1984-12-27 1988-11-01 American Home Products Corporation (Del.) Cardiovascular artifact filter
US4836214A (en) * 1986-12-01 1989-06-06 Bomed Medical Manufacturing, Ltd. Esophageal electrode array for electrical bioimpedance measurement
US4870578A (en) * 1987-08-19 1989-09-26 Bomed Medical Manufacturing, Ltd. Diastolic clamp for bioimpedance measuring device
US4807638A (en) * 1987-10-21 1989-02-28 Bomed Medical Manufacturing, Ltd. Noninvasive continuous mean arterial blood prssure monitor
US4854327A (en) * 1988-03-07 1989-08-08 Kunig Horst E Non-invasive and continuous cardiac performance monitoring device
US4979110A (en) * 1988-09-22 1990-12-18 Massachusetts Institute Of Technology Characterizing the statistical properties of a biological signal
US5046502A (en) * 1990-01-22 1991-09-10 Kunig Horst E Method and apparatus for measuring cardiac efficiency
US5178154A (en) * 1990-09-18 1993-01-12 Sorba Medical Systems, Inc. Impedance cardiograph and method of operation utilizing peak aligned ensemble averaging
US5423326A (en) * 1991-09-12 1995-06-13 Drexel University Apparatus and method for measuring cardiac output
US5309917A (en) * 1991-09-12 1994-05-10 Drexel University System and method of impedance cardiography and heartbeat determination
US5261411A (en) * 1991-12-27 1993-11-16 Abbott Laboratories Thermal drift correction while continuously monitoring cardiac output
IL102300A (en) * 1992-06-24 1996-07-23 N I Medical Ltd Non-invasive system for determining of the main cardiorespiratory parameters of the human body
US5297557A (en) * 1992-10-14 1994-03-29 Del Mar Avionics Stress test system with bidirectional filter
US5265615A (en) * 1992-12-18 1993-11-30 Eyal Frank Method and apparatus for continuous measurement of cardiac output and SVR
US5406955A (en) * 1993-03-12 1995-04-18 Hewlett-Packard Corporation ECG recorder and playback unit
US5505209A (en) * 1994-07-07 1996-04-09 Reining International, Ltd. Impedance cardiograph apparatus and method
US5503157A (en) * 1995-03-17 1996-04-02 Sramek; Bohumir System for detection of electrical bioimpedance signals

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