Robert A. Stevenson,Robert Shawn Johnson,Kishore Kumar Kondabatni,Joseph E. Spaulding,Dominick J. Frustaci,Warren S. Dabney,Holly Noelle Moschiano
申请号：
US14669041
公开号：
US09071221B1
申请日:
2015.03.26
申请国别(地区):
US
年份:
2015
代理人:
摘要：
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.
