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AssigneeGreatbatch Ltd.
InventorsRobert A. Stevenson, Robert Shawn Johnson, Kishore Kumar Kondabatni, Joseph E. Spaulding, Dominick J. Frustaci, Warren S. Dabney, Holly Noelle Moschiano
Estimating the term…
A composite RF current attenuator for a medical lead includes a conductor having a distal electrode contactable to biological cells, a bandstop filter in series with the lead conductor for attenuating RF currents flow through the lead conductor at a selected center frequency or across a range of frequencies about the center frequency, and a lowpass filter in series with the bandstop filter and forming a portion of the lead conductor. The bandstop filter has a capacitance in parallel with a first inductance. In a preferred form, the lowpass filter includes a second inductance in series with the bandstop filter, wherein the values of capacitance and inductances for the composite RF current attenuator are selected such that it attenuates MRI-induced RF current flow in an MRI environment.
An implantable device, comprising:
A composite filter circuit for attenuating an MRI RF pulsed frequency in active implantable medical devices or medical leads, the composite filter circuit comprising:
Dependencies are inferred from the claim text.