MAGNETIC RESONANCE IMAGING COMPATIBLE MEDICAL ELECTRICAL LEAD AND METHOD OF MAKING THE SAME

摘要

This disclosure describes an implantable medical lead, and method of making such a lead or components of the lead, that reduces the undesirable effects the fields generated by an MRI device may have on the implantable medical lead and the implantable medical device. The implantable medical lead includes an RF filter placed in series with an electrical path to an electrode of the lead. In one example, the RF filter may comprise a conductor wound in such a manner that it provides an inductance and capacitance that provides the RF filter with a resonant frequency, and in some instances, multiple resonant frequencies. At frequencies around the resonant frequency of the RF filter, the RF filter presents a high impedance, thereby blocking the signal from or at least attenuating the signal propagating to the electrode. At frequencies far from the resonant frequency, the RF filter presents a low impedance.