Measuring apparatus

Details Measuring apparatus Measuring apparatus

1994-03-31

1997-07-15

Sykes, Angela D.

Surgery

Truss

Pad

128692, A61B 500

Patent

active

056473591

ABSTRACT:
Light components are radiated into a blood vessel from light-emitting diodes (17, 18) for emitting light components having different wavelengths through an optical fiber. Bight components reflected by the blood upon radiation into the blood vessel are received by a photo transistor (19) to detect their reflected light intensities. For example, a minimum value of the reflected light intensity of the light component from the light-emitting diode (18) is obtained from the reflected light intensities detected within a predetermined period of time. A measurement value is calculated using this minimum value and a minimum value of the reflected light intensity of the light component from the corresponding light-emitting diode (17).

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patent: 5168873 (1992-12-01), Seiffert et al.
patent: 5190038 (1993-03-01), Polson et al.

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