Implantable device for monitoring changes in analyte concentration
First Claim
1. An implantable device for electrochemically sensing changes in the concentration of an analyte of interest, and transmitting signals indicative of the concentration changes, comprisinga transmitter including a power source a sensor electrically coupled to the transmitter, the sensor including a disc-shaped body having two opposing sides, each side of the sensor body having a cathode and a plurality of anodes, whereby the combined transmitter and sensor can be implanted in a mammal for wireless transmission to an external receiver of data indicative of analyte concentration.
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Abstract
The invention provides an electrochemical sensor system for measuring analyte concentrations in a fluid sample. The invention is particularly useful for measuring analytes such as glucose in a patient. An implantable glucose sensor includes a disc-shaped sensor body containing multiple anodes on opposing sides of the sensor body. Electrodes including an anode and a cathode are connected to a transmitter which transmits radio signals to an external receiver and computer where data is processed to yield glucose concentration figures. An enzyme layer coating the anodes specifically reacts with glucose to increase signals generated by the anodes in response to the presence of glucose. In an alternate embodiment, some of the anodes are coated with the enzyme to generate a first signal, and other anodes that are not coated generate a second signal for comparison with the first signal to eliminate effects of interfering substances on the accuracy of the glucose measurement.
636 Citations
13 Claims
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1. An implantable device for electrochemically sensing changes in the concentration of an analyte of interest, and transmitting signals indicative of the concentration changes, comprising
a transmitter including a power source a sensor electrically coupled to the transmitter, the sensor including a disc-shaped body having two opposing sides, each side of the sensor body having a cathode and a plurality of anodes, whereby the combined transmitter and sensor can be implanted in a mammal for wireless transmission to an external receiver of data indicative of analyte concentration.
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6. An analyte concentration monitoring system comprising
a sensor including a sensor body having two opposing sides, each side of the sensor body having at least one cathode, plural anodes and a semi-permeable membrane covering the anodes, the sensor being capable of generating analog data signals indicative of analyte concentration in a fluid surrounding the sensor, a transmitter including a power source, the transmitter being electrically coupled to the sensor and capable of converting the data signals into corresponding radio transmission signals a receiver for receiving the radio transmission signals at a remote location.
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8. A method of making an implantable analyte sensor comprising
providing a sensor body having two opposing sides, creating at least one cathode and plural anodes on both sides of the sensor body, and depositing a semi-permeable membrane on the cathodes and anodes.
Specification