System for measuring a blood parameter and method therefor

Details System for measuring a blood parameter and method therefor System for measuring a blood parameter and method therefor

1991-07-02

1996-06-04

Cohen, Lee S.

Surgery

Truss

Pad

356 41, 128665, A61B 500

Patent

active

055223893

ABSTRACT:
A system for measuring a blood parameter, such as pH, pCO.sub.2 or pO.sub.2, comprises an optical probe with an optical fiber and an invasive blood sensor. Light emitted by a light-emitting diode (1) is irradiated into an optical fiber (2). The system compensates for variations in the luminous efficiency of the LED (1) in that either a fraction of the light is fed directly to a photodetector (22), or in that the forward voltage of the LED is measured, and in that the signal received from the sensor is either normalized, or in that the LED drive current is adjusted accordingly.

REFERENCES:
patent: 4114604 (1978-09-01), Shaw et al.
patent: 4178917 (1979-12-01), Shapiro
patent: 4796636 (1989-01-01), Branstetter et al.
patent: 5012809 (1991-05-01), Shube
patent: 5047627 (1991-09-01), Yim et al.
patent: 5066859 (1991-11-01), Karkar et al.
patent: 5098659 (1992-03-01), Yim et al.
patent: 5115811 (1992-05-01), Hartkub et al.
patent: 5119463 (1992-06-01), Vurek et al.

Affiliated with

Also associated with

Rating

System for measuring a blood parameter and method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for measuring a blood parameter and method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for measuring a blood parameter and method therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-377369