Implantable blood glucose sensor system
US6579498B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Oct 11, 2000 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Oct 11, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2560/0219
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implanted sensing device (1) for monitoring an analyte (e.g. blood-glucose) includes a non-toxic macromolecular material (2) encapsulated within an envelope (3) of bio-compatible semi-permeable membrane. A sensor (4) responds to change of a physical property (e.g. viscosity) of the material (2) when the analyte contacts the material (2), to signal the change to a measurement circuit (5) that together with the sensor (4) and a transponder (6) are included within the envelope (3). The transponder (6) is interrogated externally of the implanted sensor (1) by an interrogation unit (7) to transmit measurement data for processing and storage. The interrogation signal is utilized within the device (1) to power the circuit (5) and transponder (6) and conveys data to the device for re-calibration or resetting of signal-datum values to compensate for aging or drift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.