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Implantable medical sensor system

United States Patent

6,201,980
March 13, 2001
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
An implantable chemical sensor system for medical applications is described which permits selective recognition of an analyte using an expandable biocompatible sensor, such as a polymer, that undergoes a dimensional change in the presence of the analyte. The expandable polymer is incorporated into an electronic circuit component that changes its properties (e.g., frequency) when the polymer changes dimension. As the circuit changes its characteristics, an external interrogator transmits a signal transdermally to the transducer, and the concentration of the analyte is determined from the measured changes in the circuit. This invention may be used for minimally invasive monitoring of blood glucose levels in diabetic patients.
Darrow; Christopher B. (Pleasanton, CA), Satcher, Jr.; Joe H. (Modesto, CA), Lane; Stephen M. (Oakland, CA), Lee; Abraham P. (Walnut Creek, CA), Wang; Amy W. (Berkeley, CA)
The Regents of the University of California (Oakland, CA)
09/ 166,236
October 5, 1998
The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.