Apparatus and process for reducing the susceptibility of...

Details Apparatus and process for reducing the susceptibility of... Apparatus and process for reducing the susceptibility of...

A - Human Necessities

61

N

A61N 1/08 (2006.01) A61F 2/48 (2006.01) A61M 1/12 (2006.01)

Patent

CA 2516034

A feedthrough terminal assembly for an active implantable medical device (AIMD) includes a plurality of leadwires extending from electronic circuitry of the AIMD, and a lossy ferrite inductor through which the leadwires extend in non-conductive relation for increasing the impedance of the leadwires at selected RF frequencies and reducing magnetic flux core saturation of the lossy ferrite inductor through phase cancellation of signals carried by the leadwires. A process is also provided for filtering electromagnetic interference (EMI) in an implanted leadwire extending from an AIMD into body fluids or tissue, wherein the leadwire is subjected to occasional high-power electromagnetic fields such as those produced by medical diagnostic equipment including magnetic resonance imaging.

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