Electrochemical sensor having symmetrically distributed analyte sensitive areas

US9757060B2 · kind B2 · utility

Assignee

• Roche Diabetes Care, Inc. · US

Inventors

• Harvey Buck · Indianapolis, US
• Georgeta Lica · Indianapolis, US
• Karl-Heinz Koelker · Havelsee, DE
• Ewald Rieger · Frankenthal (Pfalz), DE

Key dates

• Filing date: Jul 20, 2015
• Grant date: Sep 12, 2017
• Expiry date: Jul 20, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/301
• WIPO field: Measurement
• WIPO sector: Instruments

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.