Devices and methods for detection of slippage of magnetic coupling in implantable medical devices
US9078711B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2012 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Apr 12, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/0223
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for the detection of slippage of magnetic coupling between an implanted medical device having a magnet and an externally applied magnetic field includes at least one external magnet configured to apply the externally applied magnetic field, an induction coil disposed external to the subject and between the at least one external magnet and the implanted medical device, and a detection circuit operatively coupled to the induction coil and configured to detect slippage between the rotational orientation of the magnet of the implanted device and the externally applied magnetic field based at least in part on the varying frequency components of the voltage waveform across the induction coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.