Surgery – Truss – Perineal
Patent
1976-05-19
1978-08-22
Cohen, Lee S.
Surgery
Truss
Perineal
128 205T, A61B 502
Patent
active
041081668
ABSTRACT:
The specification describes a cardiac frequency measuring instrument which has a frequency measuring device to be carried on the arm of a user. A cable connects the measuring instrument with measuring electrodes carried on the body and with an optical display for the measured heart frequency. There is a miniaturized digital circuit accommodated in the housing having the size of a wrist watch with a minimum electrical power* for the digital measurement and display of the cardiac frequency. Use is made of a resonant amplifier, connected as a high pass filter, for suppressing the amplification and display of motional artefacts.
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"A New Instantaneous Ratemeter," Methods & Instrumentation In Med. Eng., 1972.
"Heartbeat Totalizer," Waters Product Data, 1965.
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