An apparatus and method for indicating cardiac output

An apparatus for indicating cardiac output comprises means for monitoring a patient's transthoracic impedance and generating a corresponding impedance signal, and signal processing means for (a) deriving a signal S1 which is a measure of the average amplitude of the impedance signal, (b) filter...

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Hauptverfasser:	NAVARRO-PAREDES, CESAR, OSWALDO, DIMAIO, REBECCA, ANDERSON, JOHN, MCCUNE
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	DIAGNOSIS ELECTROTHERAPY HUMAN NECESSITIES HYGIENE IDENTIFICATION MAGNETOTHERAPY MEDICAL OR VETERINARY SCIENCE RADIATION THERAPY SURGERY ULTRASOUND THERAPY
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creator	NAVARRO-PAREDES, CESAR, OSWALDO DIMAIO, REBECCA ANDERSON, JOHN, MCCUNE
description	An apparatus for indicating cardiac output comprises means for monitoring a patient's transthoracic impedance and generating a corresponding impedance signal, and signal processing means for (a) deriving a signal S1 which is a measure of the average amplitude of the impedance signal, (b) filtering the impedance signal at a plurality of different wavelengths within a predetermined frequency band, (c) for each filter deriving a signal S2 which is a measure of the average amplitude of the respective filter output, (d) calculating the ratio of the maximum one of the signals S2 derived from step (c) to the signal S1 derived from step (a), and (e) using the ratio from step (d) in a decision tree to provide a signal indicating cardiac output or not.
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subjects	DIAGNOSIS ELECTROTHERAPY HUMAN NECESSITIES HYGIENE IDENTIFICATION MAGNETOTHERAPY MEDICAL OR VETERINARY SCIENCE RADIATION THERAPY SURGERY ULTRASOUND THERAPY
title	An apparatus and method for indicating cardiac output
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