Pulse-wave propagation time basis blood pressure monitor

Details Pulse-wave propagation time basis blood pressure monitor Pulse-wave propagation time basis blood pressure monitor

1995-06-06

1997-07-22

Nasser, Robert L.

Surgery

Truss

Pad

128682, 128687, A61B 500

Patent

active

056495439

ABSTRACT:
A pulse-wave propagation time basis blood pressure monitor includes a memory for storing an equation describing the relationship between the pulse wave propagation time and the parameter .alpha., input means for entering the blood pressure value for calibration, a time-interval detect reference point detecting means for detecting a reference point for detecting the time interval of a pulse wave in the aorta of a subject; pulse wave detecting means for detecting a pulse wave which appears in the peripheral blood vessel after it appears in the aorta; pulse-wave propagation time measuring section for measuring a pulse wave propagation time from the output signals of the time-interval detect reference point detecting means and the pulse wave detecting means, first computing means for determining the parameter .alpha. proper to the subject on the basis of the general equation stored in the memory by using the pulse wave propagation time for calibration gathered from the subject, second computing means for determining the parameter .beta. to be added in computing a blood pressure value by using the pulse wave propagation time, by using the blood pressure value inputted for calibration, the pulse wave propagation time measured for calibration, and the parameter .alpha. determined by the first computing means, third computing means for computing a blood pressure value by using the measured pulse wave propagation time, and the parameters .alpha. and .beta., and measured data output means for outputting data of the computed blood pressure value.

REFERENCES:
patent: 4807638 (1989-02-01), Sramek
patent: 4907596 (1990-03-01), Schmid et al.
patent: 5237997 (1993-08-01), Greubel et al.
patent: 5241964 (1993-09-01), McQuilkin
patent: 5309916 (1994-05-01), Hatschek

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