Surgery – Truss – Pad
Patent
1979-10-15
1982-05-25
Michell, Robert W.
Surgery
Truss
Pad
128690, A61B 502
Patent
active
043311547
ABSTRACT:
A digital watch is employed to measure systolic and diastolic blood pressure as well as heart rate. The band of the watch supports a piezoelectric transducer that is held in contact with the wrist adjacent to the radial artery when a switch on the band is activated. The watch contains electronic circuitry that derives a binary representation of the maximum or systolic pressure and the minimum or diastolic pressure that is generated at the artery by blood pressure pulses which can be displayed. Electronic circuitry is also provided to generate and address corresponding to the time interval T between successive measured heart beats. The address is used to access a memory device that contains a stored list of heart rates in cycles per minute. The contents of the memory at the address T corresponds to the reciprocal of T, in units of pulses per minute and a representation of the contents of the memory can be displayed.
REFERENCES:
patent: 3717140 (1973-02-01), Greenwood
patent: 3807388 (1974-04-01), Orr et al.
patent: 3978849 (1976-09-01), Gencen
patent: 4129124 (1978-12-01), Thalmann
patent: 4190886 (1980-02-01), Sherman
"Silicon Transducer Strapped to Wrist Reads Blood Pressure", Electronics vol. 50, No. 9, Apr. 28, 1977, pp. 29-30.
Pratapa, Reddy, V.C.V., "All-Digital Instantaneous Heart Rate Meter", Med. & Biol. Engr. & Computing, vol. 15 1977, pp. 471-472.
Broadwater Ronald L.
Haynes Russell R.
Mitry Samah A.
Broadwater, Sr. Ronald L.
Jaworski Francis T.
Michell Robert W.
Tech Engineering & Design
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