ES2239775T3 - Sistema para estimar salidas cardiacas. - Google Patents

Sistema para estimar salidas cardiacas.

Info

Publication number
ES2239775T3
ES2239775T3 ES96937752T ES96937752T ES2239775T3 ES 2239775 T3 ES2239775 T3 ES 2239775T3 ES 96937752 T ES96937752 T ES 96937752T ES 96937752 T ES96937752 T ES 96937752T ES 2239775 T3 ES2239775 T3 ES 2239775T3
Authority
ES
Spain
Prior art keywords
estimator
trend
indicator
signal
local
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 - Lifetime
Application number
ES96937752T
Other languages
English (en)
Inventor
Russell Mckown
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.)
Edwards Lifesciences Corp
Original Assignee
Edwards Lifesciences Corp
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 Edwards Lifesciences Corp filed Critical Edwards Lifesciences Corp
Application granted granted Critical
Publication of ES2239775T3 publication Critical patent/ES2239775T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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 for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/026—Measuring blood flow
    • A61B5/0275—Measuring blood flow using tracers, e.g. dye dilution
    • A61B5/028—Measuring blood flow using tracers, e.g. dye dilution by thermo-dilution
    • 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 for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/026—Measuring blood flow
    • A61B5/029—Measuring blood output from the heart, e.g. minute volume
    • 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)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Physics & Mathematics (AREA)
  • Cardiology (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Physiology (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Electrotherapy Devices (AREA)

Abstract

EL GASTO CARDIACO (GC) SE CALCULA POR SEPARADO EN UN ESTIMADOR LOCAL (118) Y EN UN ESTIMADOR DE TENDENCIAS (120) PARA PROPORCIONAR VALORES DE GC. SE INYECTA UN INDICADOR TERMICO PREFERENTEMENTE DE ACUERDO CON UN PERFIL SEUDOALEATORIO DE SEÑALES DE SECUENCIA BINARIA (X(T)) EN UNA POSICION SUPERIOR DE LA CORRIENTE SANGUINEA DE UNA REGION DE FLUJO SANGUINEO DEL ORGANISMO DE UN PACIENTE, DETECTANDOSE COMO UNA SEÑAL DE SALIDA DE UN INDICADOR (108) (Y(T)) EN UNA POSICION INFERIOR DE LA CORRIENTE SANGUINEA. SE ELIMINA PREFERENTEMENTE EL RUIDO DE BAJA FRECUENCIA DE LA SEÑAL DE SALIDA DEL INDICADOR DETECTADA. LAS ESTIMACIONES LOCALES Y DE TENDENCIAS SE BASAN EN LOS VALORES MEDIDOS DE LA FUNCION DE TRANSFERENCIA FRECUENCIA - DOMINIO ENTRE LA SEÑAL DETECTADA Y LA SEÑAL DE ENTRADA DEL INDICADOR EN RELACION CON UN MODELO PREDETERMINADO DE FUNCION DE TRANSFERENCIA, QUE PREFERENTEMENTE ES UN MODELO NORMAL AISLADO DEL CALOR. EL ESTIMADOR DE TENDENCIAS ES PREFERENTEMENTE UN FILTRO KALMAN. EL ESTIMADOR LOCALGENERA PREFERENTEMENTE SU ESTIMACION A PARTIR DE UNA OPTIMACION NO REPETITIVA DE UNA FUNCION DE COSTES. EL ESTIMADOR LOCAL PROPORCIONA PREFERENTEMENTE VALORES INICIALES PARA INICIAR LA ACTIVIDAD DEL ESTIMADOR DE TENDENCIAS.
ES96937752T 1995-10-26 1996-10-25 Sistema para estimar salidas cardiacas. Expired - Lifetime ES2239775T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/548,937 US5687733A (en) 1995-10-26 1995-10-26 System and method for estimating cardiac output

Publications (1)

Publication Number Publication Date
ES2239775T3 true ES2239775T3 (es) 2005-10-01

Family

ID=24190994

Family Applications (1)

Application Number Title Priority Date Filing Date
ES96937752T Expired - Lifetime ES2239775T3 (es) 1995-10-26 1996-10-25 Sistema para estimar salidas cardiacas.

Country Status (10)

Country Link
US (1) US5687733A (es)
EP (1) EP0862379B1 (es)
JP (2) JPH11513910A (es)
CN (1) CN1130166C (es)
AU (1) AU699527B2 (es)
CA (1) CA2235615C (es)
DE (1) DE69634205T2 (es)
ES (1) ES2239775T3 (es)
RU (1) RU2214787C2 (es)
WO (1) WO1997015230A1 (es)

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US7734333B2 (en) 2006-03-29 2010-06-08 Medtronic, Inc. Method and apparatus for detecting arrhythmias in a medical device
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WO2011094487A2 (en) 2010-01-29 2011-08-04 Edwards Lifesciences Corporation Elimination of the effects of irregular cardiac cycles in the determination of cardiovascular parameters
US8930647B1 (en) 2011-04-06 2015-01-06 P4tents1, LLC Multiple class memory systems
US9176671B1 (en) 2011-04-06 2015-11-03 P4tents1, LLC Fetching data between thread execution in a flash/DRAM/embedded DRAM-equipped system
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US9170744B1 (en) 2011-04-06 2015-10-27 P4tents1, LLC Computer program product for controlling a flash/DRAM/embedded DRAM-equipped system
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Also Published As

Publication number Publication date
WO1997015230A1 (en) 1997-05-01
RU2214787C2 (ru) 2003-10-27
AU7522196A (en) 1997-05-15
EP0862379B1 (en) 2005-01-19
JP3701285B2 (ja) 2005-09-28
DE69634205D1 (de) 2005-02-24
AU699527B2 (en) 1998-12-03
CN1204241A (zh) 1999-01-06
DE69634205T2 (de) 2005-07-07
JP2004000653A (ja) 2004-01-08
EP0862379A1 (en) 1998-09-09
US5687733A (en) 1997-11-18
CA2235615C (en) 2001-05-08
JPH11513910A (ja) 1999-11-30
CA2235615A1 (en) 1997-05-01
CN1130166C (zh) 2003-12-10

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