Paul B. Benni - Acton MA, US Suzanne M. Carroll - Norwich CT, US
Assignee:
CAS MEDICAL SYSTEMS, INC. - Branford CT
International Classification:
A61B 5/1455
US Classification:
600323
Abstract:
A method and apparatus for determining a venous oxygen saturation value (SvO2) of a subject is provided. The method includes the steps of: a) sensing a plurality of tissue regions on a subject using a NIRS oximeter adapted to determine a tissue oxygen saturation value (StO2) for each region, each region independent of the other regions and each region sensed using a NIRS oximeter sensor specific to that region, and determining a StO2 value for that region; b) assigning a coefficient to each region, each of which coefficients reflects a portion of the StO2 value for the region attributable to a composite venous blood return representative of the tissue regions measured; and c) determining a composite SvO2 value for the subject using the StO2 region values and the respective coefficients.
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