Noise rejecting electronic sphygmomanometer and methods for meas

Details Noise rejecting electronic sphygmomanometer and methods for meas Noise rejecting electronic sphygmomanometer and methods for meas

1975-06-11

1977-02-01

Howell, Kyle L.

Surgery

Truss

Perineal

128 205A, 128 205M, 128 205S, A61B 502

Patent

active

040057011

ABSTRACT:
A noise rejecting electronic sphygmomanometer comprises a conventional cuff-type sphygmomanometer having an inflatable bladder and pressure monitoring manometer connected thereto. A first microphone, having a sound pickup directed inwardly to be toward a patient's arm when the cuff is installed thereabout, is provided for picking up Korotkoff sounds as the cuff is deflated and blood flow in a patient's arm resumes. To avoid spurious indications caused by background sounds, a second microphone, having a pickup directed to pickup background noises, is also provided within the cuff. The outputs of both microphones are fed into electronic discrimination circuitry.

REFERENCES:
patent: 2827040 (1958-03-01), Gilford
patent: 3157177 (1964-11-01), Smith
patent: 3533401 (1970-10-01), Streu
patent: 3633568 (1972-01-01), Hobel
patent: 3771515 (1973-11-01), Hurwitz
patent: 3880145 (1975-04-01), Blick
patent: 3905354 (1975-09-01), Lichowsky

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