Patent ID: 8996126
Filing Date: 2015-03-31
Classification: A61B,A61N,H03H

Abstract:
1. An implantable device, comprising: a) at least one lead conductor having a length extending from a proximal conductor end to a distal conductor portion having a distal conductor end, wherein the proximal conductor end is electrically connectable to an active implantable medical device; b) at least one electrode electrically connected to the distal conductor portion or the distal conductor end, wherein the electrode is contactable with biological cells; and c) at least one self-resonant inductor comprising at least a portion of the lead conductor formed as a coiled inductor; d) a first dielectric material coating the lead conductor forming the self-resonant inductor having a parasitic capacitance between adjacent turns of the coiled inductor to thereby provide an equivalent circuit comprising a first inductance in parallel with a capacitance so that the self-resonant inductor has a resonant impedance centered at an MRI RF pulse frequency or across a range of frequencies about the center frequency; e) at least one second non-resonant inductance of at least 100 nanohenries electrically connected in series with the self-resonant inductor along the length of the lead conductor, wherein the second inductance is non-resonant at or near the MRI RF pulsed frequency; and f) a second dielectric material coating the second inductance, g) wherein at least the first dielectric material adhesively attaches together adjacent coils comprising the self-resonant inductor so that a resulting resonant impedance remains stable.