Glucometer comprising an implantable light source
First Claim
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1. Apparatus for assaying an analyte in a body comprising:
- at least one light source implanted in the body controllable to illuminate a tissue region in the body with light at at least one wavelength that is absorbed by the analyte and generates thereby photoacoustic waves in the tissue region;
at least one acoustic sensing transducer coupled to the body that receives acoustic energy from the photoacoustic waves and generates signals responsive thereto; and
a processor that receives the signals and processes them to determine a concentration of the analyte in the illuminated tissue region.
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Abstract
Apparatus for assaying an analyte in a body comprising: at least one light source implanted in the body controllable to illuminate a tissue region in the body with light at at least one wavelength that is absorbed by the analyte and as a result generates photoacoustic waves in the tissue region; at least one acoustic sensing transducer coupled to the body that receives acoustic energy from the photoacoustic waves and generates signals responsive thereto; and a processor that receives the signals and processes them to determine a concentration of the analyte in the illuminated tissue region.
22 Citations
24 Claims
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1. Apparatus for assaying an analyte in a body comprising:
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at least one light source implanted in the body controllable to illuminate a tissue region in the body with light at at least one wavelength that is absorbed by the analyte and generates thereby photoacoustic waves in the tissue region;
at least one acoustic sensing transducer coupled to the body that receives acoustic energy from the photoacoustic waves and generates signals responsive thereto; and
a processor that receives the signals and processes them to determine a concentration of the analyte in the illuminated tissue region. - View Dependent Claims (2, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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3. Apparatus for assaying an analyte in a body comprising:
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at least one light source implanted in the body controllable to illuminate a tissue region in the body with light at at least one wavelength that is absorbed by the analyte and generates a change in an acoustic property of the region;
at least one sensing acoustic transducer that generates signals responsive to acoustic energy incident thereon;
at least one transmitting acoustic transducer that transmits ultrasound that is incident on the region and thereafter on the sensing transducer; and
a processor that receives signals generated by the sensing transducer responsive to the incident ultrasound and processes them to determine a measure of the change and therefrom concentration of the analyte.
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4. Apparatus for assaying an analyte in a body comprising:
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a membrane formed from a material permeable to interstitial fluid in the body and the analyte therein that bounds a volume region in the body, which volume region contains interstitial fluid that permeates through the membrane to enter the volume;
at least one light source implanted in the body that illuminates the volume with light at at least one wavelength that is absorbed by the analyte and generates thereby photoacoustic waves in the volume;
at least one acoustic sensing transducer coupled to the body that receives acoustic energy from the photoacoustic waves and generates signals responsive thereto; and
a processor that receives the signals and processes them to determine a concentration of the analyte in the illuminated volume.
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5. Apparatus for assaying an analyte in interstitial fluid in a body comprising:
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at least one light source implanted in the body that provides light at at least one wavelength that is absorbed by the analyte;
at least one photosensor implanted in the body that receives light from the at least one light source and generates signals responsive thereto;
a membrane formed from a material permeable to components of interstitial fluid in the body and the analyte that bounds a volume sandwiched between the at least one light source and the at least one photosensor and wherein the light from the at least one light source that reaches the at least one photosensor propagates through the volume; and
circuitry that receives the signals from the at least one photosensor and uses them to provide an assay of the analyte in the body. - View Dependent Claims (6, 7)
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Specification