System and method for controlling an implantable medical device subject to magnetic field or radio frequency exposure
US7242981B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 2003 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Jul 13, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3718
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for controlling an implantable medical device (e.g., a drug delivery device) susceptible to malfunctioning during exposure to a magnetic field and/or Radio Frequency field (e.g., during a magnetic resonance imaging procedure) and a method for operating the same. Exposure of the implantable device to the magnetic field and/or the Radio Frequency field is detected using the sensing device. When the detected magnetic field and/or Radio Frequency field exceeds a corresponding predetermined threshold level, an input signal is generated at the microcontroller. In response to the generated input signal, the microcontroller automatically triggers (i) a safety mode enabling a predetermined safety mode operation that alters some operation, without ceasing all operation, of the implantable medical device and/or (ii) after expiration of a predetermined safety mode time interval when the at least one field being detected falls below its corresponding predetermined threshold level or a predetermined period of time elapses, a self testing mode enabling a predetermined self testing operation to verify proper operation of the implantable medical device. Preferably, both the safety and self…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.