Process and apparatus for the non-intrusive measurement of circu

Details Process and apparatus for the non-intrusive measurement of circu Process and apparatus for the non-intrusive measurement of circu

1977-07-18

1979-12-11

Cohen, Lee S.

Surgery

Truss

Pad

128 205E, A61B 502

Patent

active

041778014

ABSTRACT:
The invention relates to an apparatus and a process for measuring circulatory parameters by external route.
The apparatus of the invention consists of a pressure-applying device such as a cuff 1 to which is connected a Y-shaped tube 2 of which one of the branches 2a is connected to one pole 3a of an electronic differential pressure gauge 3, in itself already known, and the other branch 2b is connected to an airtight air-reservoir 4, there being situated on the said other branch between the air-reservoir and the pressure-applying device a device 5 for closing the said other branch together with the outlet 6 of an air-pump 7, the outlet of the said air-reservoir being connected to the other pole 3b of the differential pressure gauge.
The invention may be used for determining the shape, amplitude and frequency of the pulse, for monitoring variations in arterial pressure and for measuring and indicating digitally systolic, mean and diastolic pressures.

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Raines et al, "A Noninvasive Pressure Pulse Recorder . . . ", Med. Inst., vol. 7, No. 4, Sep.-Oct. 1973, pp. 245-250.

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