Noninvasive continuous cardiac output monitor

Details Noninvasive continuous cardiac output monitor Noninvasive continuous cardiac output monitor

1982-06-29

1984-05-22

Smith, Jerry

Boots, shoes, and leggings

364416, 364417, 128693, 128694, 128670, 128671, 128720, 128725, 128734, G06F 1542, H03K 1302, A61B 502, A61B 504

Patent

active

044505272

ABSTRACT:
The invention provides apparatus and methods for using the electrical bioimpedance measurements to monitor parameters associated with blood flow in a segment of body tissue. The invention eliminates the effect of respiration from the thoracic impedance as a function of time to provide a signal indicative of pulsatile thoracic impedance changes continuously. The pulsatile thoracic impedance signal is processed to produce signals indicative of the ventricular ejection time and the maximum rate of change of pulsatile thoracic impedance which are used in a microprocessor to calculate the volume of blood pumped per stroke according to an improved systolic upstroke equation.

REFERENCES:
patent: Re30101 (1979-09-01), Kubicek et al.
patent: 3730171 (1973-05-01), Namon
patent: 3835839 (1974-09-01), Brown
patent: 3835840 (1974-09-01), Mount
patent: 3871359 (1975-03-01), Pacela
patent: 3882851 (1975-05-01), Sigworth
patent: 3994284 (1976-11-01), Voelker
patent: 3996925 (1976-12-01), Djordjevich

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