In Vivo Analyte Monitor With Malfunction Detection
First Claim
1. Measuring system for in vivo monitoring of an analyte concentration with malfunction detection, comprising:
- an electrode system comprising,a working electrode,a reference electrode, anda counter electrode;
a potentiostat for adjusting a difference of potential between the electric potential of the working electrode and the electric potential of the reference electrode to a specified value and for measuring an electric current flowing between the working electrode and the counter electrode, the potentiostat comprising,a working electrode terminal for connection to the working electrode,a reference electrode terminal for connection to the reference electrode, anda counter electrode terminal for connection to the counter electrode;
an evaluation unit which monitors the electric potential of the counter electrode and which generates a malfunction signal when said potential is outside a specified reference range.
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Accused Products
Abstract
The measuring system for in vivo monitoring of an analyte concentration with malfunction detection, comprises an electrode system, a potentiostat and an evaluation unit. The electrode system has a working electrode, a reference electrode, and a counter electrode. The potentiostat is for adjusting a difference of potential between the electric potential of the working electrode and the electric potential of the reference electrode to a specified value and for measuring an electric current flowing between the working electrode and the counter electrode. The potentiostat comprises a working electrode terminal for connection to the working electrode, a reference electrode terminal for connection to the reference electrode, and a counter electrode terminal for connection to the counter electrode. The evaluation unit monitors the electric potential of the counter electrode and generates a malfunction signal when said potential is outside a specified reference range. A method of operation is also disclosed.
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Citations
12 Claims
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1. Measuring system for in vivo monitoring of an analyte concentration with malfunction detection, comprising:
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an electrode system comprising, a working electrode, a reference electrode, and a counter electrode; a potentiostat for adjusting a difference of potential between the electric potential of the working electrode and the electric potential of the reference electrode to a specified value and for measuring an electric current flowing between the working electrode and the counter electrode, the potentiostat comprising, a working electrode terminal for connection to the working electrode, a reference electrode terminal for connection to the reference electrode, and a counter electrode terminal for connection to the counter electrode; an evaluation unit which monitors the electric potential of the counter electrode and which generates a malfunction signal when said potential is outside a specified reference range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for detecting malfunctions of a measuring system for in vivo measurement of an analyte concentration, comprising
measuring an electric current flowing between a working electrode and a counter electrode the intensity of which correlates with the analyte concentration to be measured; -
monitoring an electric potential of the counter electrode; decoupling the counter electrode from the potentiostat; measuring the electric potential then occurring at the working electrode; and
,detecting malfunctions upon any deviation of the measured potential from a threshold value and the existence of a malfunction is derived when the deviation exceeds a specified threshold value.
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11. Measuring system for in vivo monitoring of an analyte concentration with malfunction detection, comprising:
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an electrode system comprising, a working electrode, a reference electrode, and a counter electrode; a potentiostat for adjusting a difference of potential between the electric potential of the working electrode and the electric potential of the reference electrode to a specified value and for measuring an electric current flowing between the working electrode and the counter electrode, the potentiostat comprising, a working electrode terminal for connection to the working electrode, a reference electrode terminal for connection to the reference electrode, and a counter electrode terminal for connection to the counter electrode; a testing resistor and at least one switch connected in series with the testing resistor for connecting the working electrode terminal to the counter electrode terminal of the potentiostat via the testing resistor for testing purposes; a testing switch for supplying a nominal potential to the counter electrode terminal of the potentiostat for testing purposes; and
,an evaluation unit which monitors the electric potential of the counter electrode and which generates a malfunction signal when said potential is outside a specified reference range.
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12. Measuring system for in vivo monitoring of an analyte concentration with malfunction detection, comprising:
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an electrode system comprising, a working electrode, a reference electrode, and a counter electrode; a potentiostat for adjusting a difference of potential between the electric potential of the working electrode and the electric potential of the reference electrode to a specified value and for measuring an electric current flowing between the working electrode and the counter electrode, the potentiostat comprising, a working electrode terminal for connection to the working electrode, a reference electrode terminal for connection to the reference electrode, and a counter electrode terminal for connection to the counter electrode; a testing resistor and at least one switch connected in series with the testing resistor for connecting the working electrode terminal to the counter electrode terminal of the potentiostat via the testing resistor for testing purposes; a testing switch for supplying a nominal potential to the counter electrode terminal of the potentiostat for testing purposes; and
,a means for evaluation to monitor the electric potential of the counter electrode and which generates a malfunction signal when said potential is outside a specified reference range.
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Specification