Optical device

Details Optical device Optical device

2007-05-22

2007-05-22

Winakur, Eric (Department: 3768)

Surgery

Diagnostic testing

Measuring or detecting nonradioactive constituent of body...

C600S336000

Reexamination Certificate

active

11057578

ABSTRACT:
A method for monitoring oxygenation of blood includes the steps of transmitting light containing a plurality of wavelengths into blood and measuring a remitted spectrum over the plurality of-wavelengths. A measured blood absorption spectrum is then calculated from the remitted spectrum and local rates of change in the measured blood absorption spectrum are estimated at a plurality of the wavelengths, including at least one isobestic wavelength. An estimate of blood oxygen saturation (SO2) is calculated as a function of absolute values of the local rates of change of the measured blood absorption spectrum.

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