Method and apparatus for determining cerebral oxygen saturation

Details Method and apparatus for determining cerebral oxygen saturation Method and apparatus for determining cerebral oxygen saturation

2007-05-22

2007-05-22

Winakur, Eric (Department: 3768)

Surgery

Diagnostic testing

Measuring or detecting nonradioactive constituent of body...

C600S310000

Reexamination Certificate

active

10506158

ABSTRACT:
A new and improved method and apparatus for determining cerebral oxygenation. In one basic aspect, a new processing methodology for oxygenation determination, in particular cerebral oxygenation, is provided based on the apprehension and discovery that time-based photon quantity determinations of the wavelength-specific light leaving the head of the patient may be significantly improved, and simplified, by determining the quantity of returning photons in at least one set of two different but closely spaced points in time following the instant of injection, and then taking the ratio of the determinations in each set, to thereby cancel and remove several important sources of error.

REFERENCES:
patent: 5524617 (1996-06-01), Mannheimer
patent: 5770454 (1998-06-01), Essenpreis et al.
patent: 6241663 (2001-06-01), Wu et al.
patent: 6381480 (2002-04-01), Stoddart et al.
patent: WO 99/26528 (1999-03-01), None

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