MEASURING CHAMBER FOR AN OPTICAL SENSOR FOR DETERMINING A CONCENTRATION OF A SUBSTANCE IN THE TISSUE FLUID OF A MAMMAL
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Abstract
A measuring chamber device for an optically operating sensor for determining a concentration of a substance that is contained in tissue fluid of a mammal. The measuring chamber device has a measuring chamber filled with a liquid measuring medium and a wall with better diffusion permeability for the substance than for other constituents of the tissue fluid. A transmitter device for emitting optical radiation into the measuring chamber, and a receiver device for receiving optical radiation that has passed through the measuring chamber are also provided.
16 Citations
42 Claims
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1-19. -19. (canceled)
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20. A measurement chamber device for an optical sensor for measuring the concentration of a substance being part of an interstitial fluid of a mammal, wherein the measurement chamber device comprises:
a measurement chamber adapted to be inserted into the body of the mammal, wherein the measurement chamber is filled with a measurement fluid and comprises a wall, the wall including, at least one wall section enabling a better diffusion of the substance than of other components of the interstitial fluid, the measurement chamber further including a first measurement chamber window section receiving a transmitter unit for emitting optical radiation into the measurement chamber and a second measurement chamber window section receiving a receiver unit for detecting optical radiation transmitted through the measurement chamber, the measurement chamber device further comprising a sterilization envelope which encloses the wall section al the measurement chamber but does not block the optical radiation at the measurement chamber window sections, wherein the sterilization envelope is filled with measurement fluid to bathe the wall section in measurement fluid, and wherein the sterilization envelope is selectively removable before use of the measurement chamber. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 38, 40)
- 34. A module for a sensor for measuring a concentration of a substance, the module comprising a measurement chamber device including to measurement chamber adapted to be inserted into the body of the mammal and filled with a measurement fluid, the chamber comprising a wall including at least one wall section enabling as better diffusion of the substance than of other components of the interstitial fluid, the measurement chamber device further comprising a first measurement chamber window section designed to be connected to a transmitter unit for emitting optical radiation into the measurement chamber and a second measurement chamber window section designed to be connected to a receiver unit for detecting optical radiation transmitted through the measurement chamber, wherein the wall and the measurement window sections enclose the measurement fluid, and the device further comprising a Sterilization envelope enclosing the wall section of the measurement chamber, wherein the sterilization envelope is filled also with measurement fluid to bathe the wall section in measurement fluid, and wherein the measurement chamber is elongated having a length and a pair of opposing ends, the first measurement chamber window section being located at one end and the second measurement chamber window section being located at the opposing end, the measurement chamber being adapted for transmission of the optical radiation along the length without reflection.
- 35. A sensor for measuring a concentration of a substance, the sensor comprising a transmitter unit for emitting optical radiation, a receiver unit for receiving the optical radiation, and a measurement chamber device, the measurement chamber device comprising a measurement chamber adapted to be inserted into the body of a mammal and filled with a measurement fluid, the measurement chamber comprising a wall including at least one wall section enabling a better diffusion of the substance than of other components of the interstitial fluid, the measurement chamber further comprising a first measurement chamber window section adapted to receive the transmitter unit, and a second measurement chamber window section receiving the receiver unit, wherein the wall and the measurement window sections enclose the measurement fluid, the measurement chamber device further comprising a sterilization envelope enclosing the wall section of the measurement chamber, the sterilization envelope being filled with measurement fluid to bathe the all section in measurement fluid, and being selectively removable before use of the measurement chamber.
Specification