Multifinger photocell plethysmography system

Details Multifinger photocell plethysmography system Multifinger photocell plethysmography system

1978-07-26

1980-01-15

Howell, Kyle L.

Surgery

Truss

Pad

356 39, A61B 502

Patent

active

041833600

ABSTRACT:
A photoplethysmographic instrument for simultaneous recordings of multifinger blood flow. The instrument consists of a plurality of suitably spaced and angled finger-receiving housings, each containing a photodetector, with respective light pipe bundles conducting light from a common source to the housings. The photodetectors respond to differences in light transmission through the patient's fingers inserted in the housings. The photodetectors are connected through respective preamplifiers to the respective inputs of a multichannel recorder, thereby providing recorded traces of the respective optical transmissions through the fingers. The photodetectors may also be connected to the respective inputs of a multichannel tape recorder, thereby providing magnetic tape recordings of the respective optical transmissions.

REFERENCES:
patent: 3103214 (1963-09-01), Smith
patent: 3450133 (1969-06-01), Birch, Jr.
patent: 3623473 (1971-11-01), Andersen
patent: 3628525 (1971-12-01), Polanyi
patent: 3858574 (1975-01-01), Page
patent: 3980075 (1976-09-01), Heule
patent: 3998550 (1976-12-01), Konishi et al.
patent: 4015595 (1977-04-01), Benjamin, Jr.

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