Implantable battery monitoring means and method
US4345603A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1980 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Feb 19, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/389
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for monitoring the status of a battery in an implantable device for a human, the device being a tissue stimulator, drug dispensing apparatus, or the like. More specifically, a battery monitoring apparatus is disclosed whereby a user is sensually stimulated whenever an implanted battery exhibits predetermined characteristics. In one embodiment, the internal resistance of a battery is periodically monitored by loading the battery at predetermined intervals. When the internal resistance exhibits a predetermined characteristic, a battery alarm circuit is activated which causes a small voltage differential to be applied under and across the skin of the user, thereby creating a mildly tingling sensation in his skin. This tingling sensation alerts the user that the battery needs to be replaced or recharged. A magnet is provided for externally disabling the monitoring apparatus after the user has been alerted that the battery needs replacement. In a further embodiment, the alarm circuitry activates an audio signal generator which provides an audibly detectable beep when the battery needs to be replaced or recharged. In a still further embodiment, the battery output v…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.