Method and device for monitoring analyte concentration by optical detection
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Accused Products
Abstract
A method and device are provided for the determination of the concentration of compounds in body tissue. The method utilises optical methods based on the interaction of light with compounds, whereby the concentration of the compound under analysis is determined. The method is especially suited for analysis for the concentration of glucose in blood or tissue of diabetic patients, a device being implanted underneath the skin of the patient and the method being carried out by using the implanted device. The device contains photo detectors at different levels connected by wires to an electronic circuit device. A differential analysis is performed on the signals from the detectors to reduce the effect of skin on the analysis.
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Citations
22 Claims
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1-11. -11. (Canceled)
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12. A device for implantation beneath the skin of a living creature, the device having outer surfaces of biocompatible material and comprising:
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detection means for detection of light, the said detection means comprising at least one of;
a substantially flat area constituting a first area and a plurality of areas constituting a first group of areas, and at least one of;
a substantially flat area constituting a second area and a plurality of areas constituting a second group of areas; and
transmitting means for transmitting a signal derived from said detection means to an external device, wherein the arrangement of the first and second areas or groups of areas within the device is such that the distance, between the skin and said detection means, over which light from a light source interacts with compounds and tissue in respect of said first area or group of areas differs from the distance, between the skin and said detection means, over which light from a light source interacts with compounds and tissue in respect of said second group of areas. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method for optically detecting the content of a compound in the body of a living creature, the method comprising:
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directing a light source on different areas of an implanted device containing detection means, the distance, between the skin and said detection means, over which light from a light source interacts with compounds and tissue in respect of one area differing from the distance, between the skin and said detection means, over which light from a light source interacts with compounds and tissue in respect of another area;
obtaining light-representing signals by means of said detection means; and
analysing the detected signals, the analysis preferably being based on the difference between the detected signals, to obtain a value for the content of a compound being detected. - View Dependent Claims (21)
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20. A method for optically detecting the content of a compound in the body of a living creature, the method comprising:
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directing a light source on different areas of an implanted device containing detection means;
obtaining light-representing signals by means of said detection means;
transmitting said light-representing signals to an external device; and
analysing the detected signals to obtain a value for the content of the compound being detected. - View Dependent Claims (22)
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Specification