Process and apparatus for measuring blood pressure

Details Process and apparatus for measuring blood pressure Process and apparatus for measuring blood pressure

1982-05-14

1984-03-20

Howell, Kyle L.

Surgery

Truss

Pad

128667, A61B 502

Patent

active

044374704

ABSTRACT:
A photoelectric transparency detector juxtaposed under a certain contact pressure with the tip of a finger works into a computer also receiving the values of an astringent pressure simultaneously applied to another part of the finger by an inflatable air cushion of a flow-blocking cuff. The computer calculates a predetermined fraction, specifically one-half, of the sum of several air-pressure values measured during a period of progressive relaxation of the astringent pressure, taken at instants coinciding with certain points of a continuous curve representing changes in the mean transparency of a skin area contacted by the detector, which constitutes a close approximation of systolic blood pressure. Diastolic blood pressure may be measured during a heartbeat immediately following a low point of the mean-transparency curve.

REFERENCES:
patent: 3192921 (1965-07-01), Erickson et al.
patent: 3229685 (1966-01-01), Ringkomp et al.
patent: 3482565 (1969-12-01), Gowen
Hommer, W. E. et al., "Indirect BP Finger Cuff", IBM Tech. Discl. Bulletin, v 8, #4, Sep. 1965.

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