METHODS AND SYSTEMS FOR DETERMINING REGIONAL BLOOD OXYGEN SATURATION

摘要

Methods and systems are presented for determining regional blood oxygen saturation (rSO2) of a subject. Differential absorption values may be determined based on received first and second light signals corresponding to light attenuated by respective first and second regions of the subject. Reference absorption curves are received, each associated with an rSO2 value and containing expected absorption values. The differential absorption values are compared with the expected absorption values to determine a best fit reference absorption curve. An rSO2 value is determined based on the best fit reference absorption curve. An rSO2 value may also be determined based on a combination of two or more rSO2 estimates. The rSO2 estimates are determined based on two or more pairs of the differential absorption values. The differential absorption values are determined based on received first and second lights signals corresponding to three or more wavelengths of light.

主权项

1. A system for determining regional blood oxygen saturation (rSO2) of a subject comprising:
processing equipment configured for:
generating a light drive signal configured to cause one or more light sources to emit a plurality of light signals, wherein the plurality of light signals corresponds to a plurality of wavelengths of light;receiving a first plurality of light signals that have been attenuated by a first region of the subject, wherein the first plurality of light signals corresponds to the plurality of wavelengths of light;receiving a second plurality of light signals that have been attenuated by a second region of the subject, wherein the second plurality of light signals corresponds to the plurality of wavelengths of light;determining a plurality of differential absorption values corresponding, respectively, to the plurality of wavelengths of light, wherein each differential absorption value of the plurality of differential absorption values is based on a difference in absorption associated with the first and second regions of the subject for a respective wavelength of light;receiving reference sets of absorption data corresponding to different rSO2 values;comparing the plurality of differential absorption values to the reference sets; anddetermining the rSO2 of the subject based on the comparison.