MRI shielding in electrodes using AC pacing
US8255055B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 2009 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Mar 3, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2001/0585
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A medical device includes a pulse generator, an electrode configured to contact tissue in a coronary vessel, a lead comprising a lead conductor, the lead conductor connecting the pulse generator with the electrode, and a filter circuit electrically connected in series between the lead conductor and the electrode. The filter circuit may include a band pass filter that attenuates signals having a frequency other than a natural resonance frequency (e.g. MRI device signals), and the pulse generator may transmit therapy signals to the electrode as a sinusoidal voltage wave at the natural resonance frequency. The filter circuit may include a diode that rectifies the sinusoidal voltage wave before the rectified sinusoidal voltage wave passes to the electrode. In some embodiments, therapy signals may be provided to the electrode through the band pass filter over a natural resonance frequency range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.