Blood pressure measuring equipment

Details Blood pressure measuring equipment Blood pressure measuring equipment

1981-02-12

1984-07-17

Howell, Kyle L.

Surgery

Truss

Pad

128682, A61B 502

Patent

active

044599919

ABSTRACT:
There is disclosed blood pressure measuring equipment comprising a sleeve with an inflatable chamber and a microphone, and an appliance connected by a line with the sleeve. The appliance comprises a pressure sensor and a differentiator connected to the sensor output. The differentiator is connected with a regulator which in operation regulates a vent valve in such a manner that the pressure in the chamber during the measurement phase, in which the systolic and diastolic pressures are measured, reduces at a constant rate. A Korotkoff tone identifier, which is connected through further elements with the microphone and the differentiator, ensures that only those signals from the microphone which occur simultaneously with a heartbeat-induced pressure fluctuation are delivered as Korotkoff tones and evaluated for determination of the systolic and diastolic pressure.

REFERENCES:
patent: 3654915 (1972-04-01), Sanctuary
patent: 3905353 (1975-09-01), Lichowsky
patent: 3905354 (1975-09-01), Lichowsky
patent: 3978848 (1976-09-01), Yen et al.
patent: 4116230 (1978-09-01), Govelick
patent: 4117835 (1978-10-01), Williams
patent: 4273136 (1981-06-01), Kubo et al.

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