Device for monitoring changes in analyte concentration
First Claim
1. A device for electrochemically sensing changes in the concentration of an analyte of interest comprisingan implantable sensor body having a pair of spaced facial expanses, each expanse of the body having at least one analyte-sensing electrode pair including an anode and a cathode spaced apart from each other and covered by a membrane which is semi-permeable to the analyte of interest, andan enzyme composition covering each anode of each analyte-sensing electrode pair, wherein the enzyme composition reacts specifically with the analyte of interest.
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Abstract
The invention provides an electrochemical sensor system for measuring analyte concentrations in a sample fluid. The invention is particularly useful for measuring analytes such as glucose in a patient. An implantable glucose sensor includes a disc-shaped body containing multiple anodes on opposing sides of the body. Electrodes are connected to a transmitter which transmits radio signals to an external receiver and computer where data is processed to yield relative glucose concentration figures.
1652 Citations
22 Claims
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1. A device for electrochemically sensing changes in the concentration of an analyte of interest comprising
an implantable sensor body having a pair of spaced facial expanses, each expanse of the body having at least one analyte-sensing electrode pair including an anode and a cathode spaced apart from each other and covered by a membrane which is semi-permeable to the analyte of interest, and an enzyme composition covering each anode of each analyte-sensing electrode pair, wherein the enzyme composition reacts specifically with the analyte of interest.
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10. A device for electrochemically sensing changes in the concentration of an analyte of interest comprising
an implantable sensor body including a plurality of analyte-sensing electrode pairs, each electrode pair including an anode and a cathode, and a membrane comprising polyparaxylxylene or a carbonate-based polyurethane coveting the anodes.
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15. A device for electrochemically sensing the concentration of an analyte of interest comprising
an implantable sensor body supporting and defining multiple analyte detection sites, each site having an analyte-sensing electrode pair, each electrode pair including an anode and a cathode for generating signals indicative of analyte concentration at one of the sites on the sensor body.
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22. A device for electrochemically sensing the concentration of an analyte of interest comprising
an implantable disk-shaped sensor body having two opposing facial expanses, each facial expanse containing at least one analyte detection site including an anode and a cathode covered by a membrane which is semi-permeable to the analyte of interest.
Specification