Method and apparatus for coupling a channeled sample probe to tissue
First Claim
1. A sample probe configured to communicate with a non-invasive spectroscopic analyzer to determine an analyte property from a sample site of a body part, said sample probe comprising a sample probe tip having a microfluidic fluid delivery channel in a surface of said sample probe tip, said microfluidic fluid delivery channel forming a pathway for dispersion of a coupling fluid across the surface of said sample probe tip,wherein said microfluidic fluid delivery channel comprises a first moat circumferentially surrounding an optic in said sample probe.
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Abstract
Sampling is controlled in order to enhance analyte concentration estimation derived from noninvasive sampling. More particularly, sampling is controlled using controlled fluid delivery to a region between a tip of a sample probe and a tissue measurement site. The controlled fluid delivery enhances coverage of a skin sample site with the thin layer of fluid. Delivery of contact fluid is controlled in terms of spatial delivery, volume, thickness, distribution, temperature, and/or pressure.
562 Citations
27 Claims
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1. A sample probe configured to communicate with a non-invasive spectroscopic analyzer to determine an analyte property from a sample site of a body part, said sample probe comprising a sample probe tip having a microfluidic fluid delivery channel in a surface of said sample probe tip, said microfluidic fluid delivery channel forming a pathway for dispersion of a coupling fluid across the surface of said sample probe tip,
wherein said microfluidic fluid delivery channel comprises a first moat circumferentially surrounding an optic in said sample probe.
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23. A method of delivering fluid to a sample site of a body part, the method comprising delivering a coupling fluid through a sample probe to a surface of a sample probe tip of said sample probe, the surface of said sample probe tip having a microfluidic fluid delivery channel forming a first pathway for dispersion of said coupling fluid across the surface of said sample probe tip,
wherein said sample probe is configured to communicate with a non-invasive spectroscopic analyzer to determine an analyte property from the sample site, and wherein said microfluidic fluid delivery channel comprises a first moat circumferentially surrounding an optic in said sample probe.
Specification