Method and apparatus for the indirect measurement of blood press

Details Method and apparatus for the indirect measurement of blood press Method and apparatus for the indirect measurement of blood press

1971-09-20

1976-01-06

Kamm, William E.

Surgery

Truss

Perineal

A61B 502

Patent

active

039304949

ABSTRACT:
A method and apparatus for automatically detecting the blood pressure of a person by auscultation in which a standard blood pressure cuff is connected to a pressure transducer for providing a pressure signal and a microphone is used for providing an electrical signal from the Korotkoff sounds detected. The Korotkoff sound electrical signal is amplified and passed through a bandpass filter which has a flat response between approximately 50 and 160 Hz and a sharp cutoff below 50 Hz. The resultant signal is then summed with the pressure signal to provide an output which indicates the pressures at which the five phases associated with the Korotkoff sounds occur.

REFERENCES:
patent: 3085567 (1963-04-01), Vigilante
patent: 3318303 (1967-05-01), Hammacher
patent: 3450131 (1969-06-01), Vogt

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