Electrochemical sensor having symmetrically distributed analyte sensitive areas

摘要

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.

主权项

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; the working electrode exposed areas and the at least one second electrode exposed area forming an array extending along the sensor; and the multiple working electrode areas and the at least one second electrode area comprising a symmetrical arrangement, wherein, when an AC signal is applied to the sensor, a symmetrical potential distribution is produced in which the potential on opposite sides of the array is substantially the same.