Fingertip pulse wave sensor

Details Fingertip pulse wave sensor Fingertip pulse wave sensor

1989-03-28

1990-11-20

Hindenburg, Max

Surgery

Truss

Pad

128666, 128687, A61B 600

Patent

active

049710621

ABSTRACT:
A fingertip pulse wave sensor includes a fingertip cushion supporting member having a fingertip cushion supporting surface, and a nail supporting member having a nail supporting surface which is disposed in opposed relationship with the fingertip cushion supporting surface at an interval smaller than the standard thickness of fingertips. Either of the fingertip cushion supporting member of the nail supporting member is fixed, and the other of the fingertip cushion supporting member and the nail supporting member is hinged. The hinged fingertip cushion supporting member or nail supporting member is urged in the direction in which they are moved to each other by an elastic body which is capable of applying a substantially fixed amount of pressure with respect to the variations in the pivot stroke caused by the variations in the thickness of the fingertips resting on the fingertip cushion supporting member. The fingertip pulse wave sensor also includes a light-emitting element which is disposed on either of the fingertip cushion supporting surface and the nail supporting surface, and a light-receiving element which is disposed on the other of the fingertip cushion supporting surface and the nail supporting surface.

REFERENCES:
patent: 3810460 (1974-05-01), Van Nie
patent: 4116228 (1978-09-01), Hudspeth et al.
patent: 4334544 (1982-06-01), Hill et al.
patent: 4685464 (1987-08-01), Goldberger et al.

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