Device for in-vivo measurement of the concentration of a substance contained in a body fluid
First Claim
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1. A device for measuring in-vivo the concentration of a constituent of a body fluid, the device comprising:
- a) an energy source adapted to be situated outside living tissue;
b) a light source powered by the energy source, emitting light in a wavelength range to which said constituent is sensitive, and adapted to be implanted in living tissue; and
c) a light detector which in a measuring position of said device receives said light and outputs a signal depending on said light received, from which signal the concentration of said constituent may be determined;
whereind) said light detector is adapted to be situated outside living tissue in said measuring position, and in said measuring position, said light source and light detector are connected to each other in fixed alignment relative to each other.
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Abstract
A device for the in-vivo measuring of a constituent of a body fluid, the device including a light emitter which emits light in a wavelength range to which the constituent is sensitive and which is implantable in living tissue, and a light detector which, when the device is in a measuring position, receives the light emitted by the emitter and outputs a signal depending on the amount of light received, from which signal the constituent may be measured, wherein the light detector is situated outside the tissue when the device is in the measuring position.
33 Citations
28 Claims
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1. A device for measuring in-vivo the concentration of a constituent of a body fluid, the device comprising:
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a) an energy source adapted to be situated outside living tissue; b) a light source powered by the energy source, emitting light in a wavelength range to which said constituent is sensitive, and adapted to be implanted in living tissue; and c) a light detector which in a measuring position of said device receives said light and outputs a signal depending on said light received, from which signal the concentration of said constituent may be determined;
whereind) said light detector is adapted to be situated outside living tissue in said measuring position, and in said measuring position, said light source and light detector are connected to each other in fixed alignment relative to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for measuring in-vivo the concentration of a constituent of a body fluid, the device comprising:
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a light source adapted to emit light; a reflector having a reflective area and adapted to be implanted in living tissue, wherein the degree of reflection for a first portion of the reflective area changes depending on the concentration of the constituent and the degree of reflection for a second portion of the reflective area does not change relative to the concentration of the constituent, and wherein the reflective area reflects the light received from the light source; and a light detector for placement in a receiving position relative to the reflector and adapted to receive light reflected from the reflector and output a signal depending on the light received, the signal pertaining to the concentration of the constituent. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A device for measuring in-vivo the concentration of a constituent of a body fluid, the device comprising:
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a light source adapted to emit light; a reflector having a reflective area and adapted to be implanted in living tissue, wherein the polarization for a first portion of the reflective area changes depending on the concentration of the constituent and the polarization for a second portion of the reflective area does not change relative to the concentration of the constituent, and wherein the reflective area reflects the light received from the light source; and a light detector for placement in a receiving position relative to the reflector and adapted to receive light reflected from the reflector and output a signal depending on the light received, the signal pertaining to the concentration of the constituent. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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Specification