Method and apparatus for controlling the cuff pressure in a sphy

Details Method and apparatus for controlling the cuff pressure in a sphy Method and apparatus for controlling the cuff pressure in a sphy

1989-05-25

1991-08-13

Cohen, Lee S.

Surgery

Truss

Pad

128685, A61B 502

Patent

active

050387901

ABSTRACT:
The invention relates to a method and an apparatus for controlling the cuff pressure in a sphygmomanometer. The pressure control mechanism for a cuff (3) consists of one or a plurality of valves (4) whose operation is controlled by a control element (5) in a manner that the pulse frequency of valve (4) or valves (4) exceeds that of the heart. By using a pulse-controlled high-speed so-called on-off valve it is possible to effect the cuff pressure drop in a completely linear fashion by opening and closing the valve at a necessary frequency and by adjusting the durations of the on- and off-periods of said valve or valves.

REFERENCES:
patent: 4116230 (1978-09-01), Gorelick
patent: 4378807 (1983-04-01), Peterson et al.
patent: 4501280 (1985-02-01), Hood, Jr.
patent: 4567899 (1986-02-01), Kamens et al.
patent: 4768518 (1988-09-01), Peltonen
patent: 4800892 (1989-01-01), Perry et al.

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