Surgery – Truss – Pad
Patent
1978-07-26
1980-04-22
Howell, Kyle L.
Surgery
Truss
Pad
128690, A61B 502
Patent
active
041989880
ABSTRACT:
In combination with a pulse transducer characterized by a source of light and a detector for light reflected from blood vessels of a living body, to provide heart signal consisting of a modulated dc signal voltage indicative of the pulse rate for the body, an artifact signal resulting from a reflection of light from the skin of the body, which includes both a constant dc signal component and a modulated dc signal component the amplitude of which is greater and the frequency of which is less than said heart signal, a signal attenuator circuit including an operational amplifier for canceling said artifact signal from the output signal of the pulse transducer.
REFERENCES:
patent: 3296463 (1967-01-01), Brault
patent: 3572324 (1971-03-01), Petersen
patent: 3769974 (1973-11-01), Smart et al.
patent: 3858574 (1975-01-01), Page
patent: 3908636 (1975-09-01), Page
patent: 3993047 (1976-11-01), Peek
Cash, Jr. Wilbur H.
Lovelace Alan M. Administrator of the National Aeronautics and Space
Polhemus John T.
Howell Kyle L.
Manning John R.
McCaul Paul F.
Mott Monte F.
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