Implantable sensor employing an auxiliary electrode
First Claim
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1. A sensor for implanting in the body of a patient comprising a biocompatible electroconductive case, a voltage source, a measuring electrode, and a reference electrode;
- the case, the voltage source, the measuring electrode and the reference electrode being associated in an electrical circuit in which the case functions as an auxiliary electrode, wherein the measuring electrode includes an enzyme-containing membrane having a semi-interpenetrating polymer network of fibrillated polytetrafluoroethylene and a silicon compound, wherein the network is infiltrated with an enzyme.
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Abstract
An implantable sensor comprising a biocompatible electroconductive case which houses a measuring electrode, a reference electrode, an auxiliary electrode, and an electronic circuit for measuring the response of the measuring electrode where the measuring electrode, reference electrode and auxiliary electrode are not in direct electrical contact with one another is provided. The implantable sensor of the present invention is particularly useful as a glucose sensor, especially when an enzyme-containing membrane is included in the measuring electrode.
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19 Claims
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1. A sensor for implanting in the body of a patient comprising a biocompatible electroconductive case, a voltage source, a measuring electrode, and a reference electrode;
- the case, the voltage source, the measuring electrode and the reference electrode being associated in an electrical circuit in which the case functions as an auxiliary electrode, wherein the measuring electrode includes an enzyme-containing membrane having a semi-interpenetrating polymer network of fibrillated polytetrafluoroethylene and a silicon compound, wherein the network is infiltrated with an enzyme.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for detecting the glucose level in a patient comprising:
implanting a glucose sensor including biocompatible electroconductive case, a voltage source, a measuring electrode, and a reference electrode;
the case, voltage source, measuring electrode and reference electrode being associated in an electrical circuit in which the case function as an auxiliary electrode, wherein the measuring electrode includes an enzyme-containing membrane having a semi-interpenetrating polymer network of fibrillated polytetrafluoroethylene and a silicon compound, wherein the network is infiltrated with an enzyme.- View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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