Patent ID: 9339240
Filing Date: 2016-05-17
CPC Classification: A61B

Claim Text:
1. A system for assessing tissue blood oxygen saturation levels, comprising: a computing device; a sensor in communication with said computing device, said sensor being configured to be attached to a human subject and having: said computing device having a memory for storing an algorithm and a processor for executing instructions associated with said algorithm, said algorithm comprising the following steps: causing said light source to emit light of a plurality of wavelengths, one wavelength at a time, into a human subject; receiving optical density measurements from said first and second light detectors for said plurality of wavelengths; calculating a space contrasted ratio of the wavelength contrast difference of the optical density based on the optical density measurements from said first and second light detectors for a first grouping of wavelengths emitted by said light source; estimating a first tissue blood oxygen saturation value based on said space contrasted ratio of the wavelength contrast difference of the optical density; calculating a second order contrasted optical density ratio based on the optical density measurements from said first and second light detectors for a second grouping of said wavelengths emitted by said light source; estimating a second tissue blood oxygen saturation value based on said second order contrasted optical density ratio; and comparing said first blood oxygen saturation value and said second blood oxygen saturation value.