Method and apparatus for determining metabolic rate ratio

Details Method and apparatus for determining metabolic rate ratio Method and apparatus for determining metabolic rate ratio

1989-04-21

1990-03-20

Cohen, Lee S.

Surgery

Truss

Pad

128670, A61B 508

Patent

active

049092596

ABSTRACT:
An apparatus and method determines the metabolic rate ratio (MRR) of a patient from data indicative of (a) oxygen and carbon dioxide concentrations of the patient, and (b) a cardiac function of the patient. The cardiac function data may be either heart rate and stroke volume of the patient, or cardiac output data from a cardiac output monitor than noninvasively and continuously monitors cardiac output. A CO.sub.2 analyzer and either an O.sub.2 analyzer or a pulse oximeter may be employed to provide the oxygen and carbon dioxide concentration data. Heart rate data is provided by either a pulse monitor or is obtained from the patient's ECG. The present invention permits measurement of MRR at any level of patient activity as well as during transitions in activity.

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W. Fincham and F. T. Tehrani, "On The Regulation of Cardiac Output and Cerebral Blood Flow", J. Biomed, Eng., vol. 5, pp. 73-75, Jan., 1983.

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