Medical sensor with amplitude independent output

Details Medical sensor with amplitude independent output Medical sensor with amplitude independent output

1993-12-17

1996-10-01

Sykes, Angela D.

Surgery

Truss

Pad

128666, 356 41, A61B 500

Patent

active

055603556

ABSTRACT:
The present invention provides a medical sensor for detecting a blood characteristic. The sensor includes a transducer for producing an analog signal related to the blood characteristic. The analog signal is converted into a transmission signal which is in amplitude-independent form for transmission to a remote analyzer. In one embodiment, a current-to-frequency converter converts a signal from a pulse oximeter sensor into a frequency signal which can be transmitted over a transmission line to a remote pulse oximeter.

REFERENCES:
patent: 4384773 (1983-05-01), Hambly
patent: 4468562 (1984-08-01), Wicnienski et al.
patent: 4759369 (1988-07-01), Taylor
patent: 4846183 (1989-07-01), Martin
patent: 4930506 (1990-06-01), Ullrich
patent: 4947033 (1990-08-01), Kordts et al.

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