ELECTROCHEMICAL SENSOR HAVING SYMMETRICALLY DISTRIBUTED ANALYTE SENSITIVE AREAS
First Claim
1. An electrochemical sensor for in vivo use, comprising:
- a substrate;
a working electrode formed on or in the substrate and having multiple working electrode areas exposed for contact with a body fluid;
a second electrode formed on or in the substrate and having at least one second electrode area exposed for contact with a body fluid; and
the multiple working electrode areas and the at least one second electrode area comprising a symmetrical arrangement, wherein a symmetrical potential distribution is produced when an AC signal is applied to the sensor.
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Accused Products
Abstract
The present invention provides an electrochemical sensor that employs multiple electrode areas that are exposed for contact with a body fluid, e.g., when the sensor is inserted subcutaneously into a patient'"'"'s skin. The exposed electrode areas are arranged symmetrically, such that a symmetrical potential distribution is produced when an AC signal is applied to the sensor. The sensors in accordance with these teachings can advantageously be used with AC signals to determine characteristics of the sensor and thus improve sensor performance. These teachings also provide a biocompatible sensor with multiple reference electrode areas that are exposed for contact with body fluid.
16 Citations
30 Claims
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1. An electrochemical sensor for in vivo use, comprising:
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a substrate; a working electrode formed on or in the substrate and having multiple working electrode areas exposed for contact with a body fluid; a second electrode formed on or in the substrate and having at least one second electrode area exposed for contact with a body fluid; and the multiple working electrode areas and the at least one second electrode area comprising a symmetrical arrangement, wherein a symmetrical potential distribution is produced when an AC signal is applied to the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electrochemical sensor for testing a body fluid, comprising:
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a substrate; a working electrode formed on or in the substrate; a counter electrode formed on or in the substrate; a reference electrode formed on or in the substrate and having multiple reference electrode areas that are exposed for contact with body fluid, wherein at least one of the multiple reference electrode areas comprises a different material composition than the remaining reference electrode areas. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An electrochemical sensor for in vivo use, comprising:
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a substrate; a working electrode formed on or in the substrate and having multiple working electrode areas exposed for contact with a body fluid; a reference electrode formed on or in the substrate and having multiple reference electrode areas exposed for contact with a body fluid; a counter electrode formed on or in the substrate and having at least one counter electrode area exposed for contact with a body fluid; the multiple working electrode areas, the multiple reference electrode areas and the at least one counter electrode area being arranged symmetrically, wherein a symmetrical potential distribution is produced when an AC signal is applied to the electrochemical sensor. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification