Patent ID: 8433421
Filing Date: 2013-04-30
Classification: A61N

Abstract:
1. An MRI/RF compatible medical lead, comprising: an elongate flexible body; a plurality of conductors extending along the elongate flexible body, each of the conductors comprising a plurality of axially spaced apart coiled segments and a plurality of linear segments with the linear segments disposed between adjacent coiled segments; at least two electrodes disposed on a distal portion of the elongate flexible body, each electrode coupled to a different one of the plurality of conductors; wherein the lead defines a plurality of high impedance RF traps spaced apart along a length of the elongate flexible body, each high impedance RF trap comprising at least one coiled segment of each of two or more of the plurality of conductors, wherein each high impedance RF trap is configured and arranged to inhibit flow of induced RF current at a first frequency, wherein the first frequency is at least 1 MHz, and each high impedance RF trap is configured and arranged to allow stimulation signals having a frequency of 1 kHz or less to pass through the high impedance RF trap.