Tissue oxygen saturation detection and related apparatus and methods
AssigneeWhoop, Inc.
InventorsDaniel Wiese, Pamela G. Anderson, Alessandro Babini
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Abstract
A wearable optical device is described for optically detecting parameters of interest within muscle, such as during physical activity or when at rest. The parameters of interest include oxygenation level and/or hemoglobin concentrations in some situations. The detected parameters, such as oxygenation level, may be used to assess physical performance, such as the extent to which the muscle is utilizing aerobic or anaerobic processes. Methods for determining the parameters of interest, such as oxygenation level, from the detected optical signals are also described, and feedback may be provided to a user.
Claims20
A system for optical measurement of oxygenation, the system comprising:
- a wearable housing;
- an optical source array in the wearable housing including a plurality of optical sources;
- a plurality of optical detectors in the wearable housing, the plurality of optical sources and the plurality of optical detectors arranged in three or more source-detector pairs formed between at least two optical sources and at least two optical detectors, wherein:
- the plurality of optical detectors and optical sources are arranged into two or more zones,
- each of the two or more zones includes at least one pair of the optical sources or at least one pair of the optical detectors,
- the two or more zones are arranged in a line spanning a surface above a volume of tissue, and
- the optical detectors and the optical sources are arranged within the two or more zones such that none of the two or more zones include both an optical source and an optical detector and one or more source-detector pairs between two of the two or more zones are at different distances than one or more other source-detector pairs between the two of the two or more zones, and
- each source-detector pair spanning the two or more zones probes a same volume of tissue spanned by the line between the two or more zones;
- and
- a processor configured to convert optical signals from the plurality of optical detectors into an indication of oxygenation or hemoglobin concentration including one or more of muscle oxygenation (SmO2), oxygenated hemoglobin concentration (HbO2), deoxygenated hemoglobin concentration (Hb), or total hemoglobin concentration (HbT), wherein the processor is configured to apply a plurality of curve fitting procedures to a plurality of alternative combinations of the plurality of optical sources and the plurality of optical detectors to obtain depth-dependent information about the indication of oxygenation or hemoglobin concentration in inhomogeneous tissue having different optical properties at different depths.
Dependencies are inferred from the claim text.