Implantable medical sensor system
US6201980A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1998 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Oct 5, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/028
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.