MULTI-STREAM SENSOR FOR NONINVASIVE MEASUREMENT OF BLOOD CONSTITUENTS
First Claim
1. A physiological, noninvasive detector configured to detect optical radiation from a tissue site, said detector comprising:
- a set of photodetectors that each provide a signal stream indicating optical radiation from the tissue site, wherein the set of photodetectors are arranged in a spatial configuration that provides a variation in path lengths between at least some of the photodetectors; and
a conversion processor that provides information indicating an analyte in the tissue site based on ratios of pairs of the signal streams.
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Accused Products
Abstract
The present disclosure relates to a sensor having a set of photodetectors that are arranged at various locations to enable the measurement of blood glucose. The photodetectors are arranged across multiple locations. For example, the detector may comprise multiple photodetector arrays that are arranged to have a sufficient difference in mean path length to allow for noise cancellation and noise reduction. Walls may be used in the detector to separate individual photodetectors and prevent mixing of detected optical radiation between the different locations on the measurement site. A window may also be employed to facilitate the passing of optical radiation at various wavelengths for measuring glucose in the tissue.
160 Citations
13 Claims
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1. A physiological, noninvasive detector configured to detect optical radiation from a tissue site, said detector comprising:
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a set of photodetectors that each provide a signal stream indicating optical radiation from the tissue site, wherein the set of photodetectors are arranged in a spatial configuration that provides a variation in path lengths between at least some of the photodetectors; and a conversion processor that provides information indicating an analyte in the tissue site based on ratios of pairs of the signal streams. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification