Non-invasive blood pressure measurement device

Details Non-invasive blood pressure measurement device Non-invasive blood pressure measurement device

1995-07-26

1997-10-14

Nasser, Robert

Surgery

Truss

Pad

128664, 128667, 128672, 128687, A01B 500

Patent

active

056761406

ABSTRACT:
A non-invasive blood pressure measurment device including: a cuff, a pressure detector for detecting a cuff pressure; a cuff pressure control pump for linearly increasing or decreasing the cuff pressure; a light-emitting member for injecting a beam of light into a part of a body by the cuff; light-receiving members for detecting an amount of light transmitted or an amount of light reflected of the beam of light injected into the body from the light-emitting member; a demodulating circuit for separating a pulsatile component from the light-receiving signal obtained from the light-receiving members; a CPU for sending a control signal to the cuff pressure control pump to thereby either increase the cuff pressure if it is judged that the pulsatile component has not been detected before applying pressure to the cuff based on the detection output from the demodulating circuit or decrease the once increased cuff pressure, and detecting an inflection point in the light-receiving signal in the course of increasing or decreasing the cuff pressure to thereby output a cuff pressure at the inflection point as a mean pressure value of a subject who is in systemic hypotension.

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"Japanese Journal of Clinical Monitoring," vol. 13, No. 1, pp. 75-84, published Jan. 20, 1992.

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