Method and device for correcting optical signals
First Claim
1. A device, comprising:
- a sensor patch configured to be placed on a surface of a skin of a mammalian body, the sensor patch including a case;
a first light source disposed within the case and located within a center portion of the case, the first light source pre-configured to generate a first optical signal within an excitation wavelength range of a luminescent dye to illuminate an implant containing the luminescent dye embedded in tissue of the mammalian body, the luminescent dye configured to emit an analyte-dependent optical signal within an emission wavelength range in response to absorbing light within the excitation wavelength range;
a second light source disposed within the case and located within the center portion of the case, the second light source pre-configured to generate a second optical signal within the emission wavelength range to illuminate the tissue; and
a plurality of detectors disposed within the case and in a ring configuration around the central portion of the case, a first detector from the plurality of detectors configured to (1) receive a third optical signal emitted from the implant embedded in the tissue, the third optical signal being within the emission wavelength range and emitted by the implant in response to the implant being illuminated with the first optical signal and (2) receive a fourth optical signal in response to the tissue being illuminated by the second optical signal, the fourth optical signal being within the emission wavelength range.
1 Assignment
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Accused Products
Abstract
An optical device is used to monitor an implant embedded in the tissue of a mammal (e.g., under the skin). The implant receives excitation light from the optical device and emits light that is detected by the optical device, including an analyte-dependent optical signal. Scatter and absorption properties of tissue change over time due to changes in hydration, blood perfusion and oxygenation. The optical device has an arrangement of light sources, filters and detectors to transmit excitation light within excitation wavelength ranges and to measure emitted light within detection wavelengths. Changes in scattering and absorption of light in the tissue, such as diffuse reflectance, are monitored. The light sources, filters and detectors may also be used to monitor autofluorescence in the tissue to correct autofluorescence background.
224 Citations
29 Claims
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1. A device, comprising:
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a sensor patch configured to be placed on a surface of a skin of a mammalian body, the sensor patch including a case; a first light source disposed within the case and located within a center portion of the case, the first light source pre-configured to generate a first optical signal within an excitation wavelength range of a luminescent dye to illuminate an implant containing the luminescent dye embedded in tissue of the mammalian body, the luminescent dye configured to emit an analyte-dependent optical signal within an emission wavelength range in response to absorbing light within the excitation wavelength range; a second light source disposed within the case and located within the center portion of the case, the second light source pre-configured to generate a second optical signal within the emission wavelength range to illuminate the tissue; and a plurality of detectors disposed within the case and in a ring configuration around the central portion of the case, a first detector from the plurality of detectors configured to (1) receive a third optical signal emitted from the implant embedded in the tissue, the third optical signal being within the emission wavelength range and emitted by the implant in response to the implant being illuminated with the first optical signal and (2) receive a fourth optical signal in response to the tissue being illuminated by the second optical signal, the fourth optical signal being within the emission wavelength range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 18, 19, 20, 21, 22, 23)
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13. A device, comprising:
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a case; a plurality of light sources and a detectors disposed within the case, each detector from the plurality of detectors disposed adjacent to a light source from the plurality of light sources in a ring configuration in an outer ring portion of the case; a first light source from the plurality of light sources disposed within a first portion of the case and pre-configured to generate a first optical signal within a first excitation wavelength range to illuminate an implant embedded in tissue of a mammalian body, the implant configured to emit an analyte-dependent optical signal within a first emission wavelength range in response to absorbing light within the first excitation wavelength range, the first emission wavelength range being different from the first excitation wavelength range, the implant configured to emit an analyte-independent optical signal within a second emission wavelength range in response to absorbing light within a second excitation wavelength range; a first detector from the plurality of detectors disposed within the first portion of the case and configured to receive a second optical signal emitted from the implant in response to the implant being illuminated with the first optical signal, the second optical signal being within the first emission wavelength range; a second light source from the plurality of light sources and pre-configured to generate a third optical signal to illuminate the implant with the second excitation wavelength range; and a second detector from the plurality of detectors disposed within a second portion of the case and configured to receive a fourth optical signal emitted from the implant embedded in the tissue, the fourth optical signal being within a second emission wavelength range, the fourth optical signal emitted by the implant in response to the implant being illuminated with the third optical signal, the second portion of the case being mutually exclusive such that the first optical signal and the second optical signal define a first light path that is spaced laterally apart from a second light path defined by the third optical signal and the fourth optical signal. - View Dependent Claims (14, 15, 16, 17, 27, 28, 29)
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24. A device, comprising:
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a sensor patch configured to be placed on a surface of a skin of a mammalian body, the sensor patch including a case; a first light source from a plurality of light sources disposed within the case, the first light source pre-configured to generate a first optical signal within an excitation wavelength range of a luminescent dye to illuminate an implant containing the luminescent dye embedded in tissue of the mammalian body, the luminescent dye configured to emit an analyte-dependent optical signal within an emission wavelength range in response to absorbing light within the excitation wavelength range; a second light source from the plurality of light sources disposed within the case, the second light source pre-configured to generate a second optical signal within the emission wavelength range to illuminate the tissue; and a plurality of detectors disposed within the case each detector from the plurality of detectors disposed adjacent to a light source from the plurality of light sources in a ring configuration in an outer ring portion of the case, a first detector from the plurality of detectors configured to (1) receive a third optical signal emitted from the implant embedded in the tissue, the third optical signal being within the emission wavelength range and emitted by the implant in response to the implant being illuminated with the first optical signal and (2) receive a fourth optical signal in response to the tissue being illuminated by the second optical signal, the fourth optical signal being within the emission wavelength range. - View Dependent Claims (25)
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26. A device, comprising:
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a case; a first light source disposed within a center portion of the case and pre-configured to generate a first optical signal within a first excitation wavelength range to illuminate an implant embedded in tissue of a mammalian body, the implant configured to emit an analyte-dependent optical signal within a first emission wavelength range in response to absorbing light within the first excitation wavelength range, the first emission wavelength range being different from the first excitation wavelength range, the implant configured to emit an analyte-independent optical signal within a second emission wavelength range in response to absorbing light within a second excitation wavelength range; a plurality of detectors disposed within the case in a ring configuration around the central portion of the case; a first detector from the plurality of detectors disposed within the first portion of the case and configured to receive a second optical signal emitted from the implant in response to the implant being illuminated with the first optical signal, the second optical signal being within the first emission wavelength range; a second light source disposed within the case and pre-configured to generate a third optical signal to illuminate the implant with the second excitation wavelength range; and a second detector from the plurality of detectors disposed within a second portion of the case and configured to receive a fourth optical signal emitted from the implant embedded in the tissue, the fourth optical signal being within a second emission wavelength range, the fourth optical signal emitted by the implant in response to the implant being illuminated with the third optical signal, the second portion of the case being mutually exclusive such that the first optical signal and the second optical signal define a first light path that is spaced laterally apart from a second light path defined by the third optical signal and the fourth optical signal.
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Specification