Patent ID: 9242090
Filing Date: 2016-01-26
CPC Classification: A61B,A61N

Claim Text:
1. An MRI compatible lead, comprising: an elongated member having a proximal end and a distal end, the elongated member configured and arranged for insertion into a patient; at least one frequency dependent circuit comprising a first conductor and a second conductor, the first conductor comprising a first inductor defined by a first coiled conductor segment and the second conductor comprising a second inductor defined by a second coiled conductor segment, wherein the at least one frequency dependent circuit comprises a first shielded parallel resonant LC circuit substantially tuned to an MRI scanner operating frequency, the first shielded parallel resonant LC circuit disposed on the first conductor at the distal end of the elongated member, the first shielded parallel resonant LC circuit comprising the first inductor and a first resonant capacitor in parallel with the first inductor; and a first electrode in electrical communication with the first conductor, wherein the first electrode is disposed at the distal end of the elongated member; and a second electrode in electrical communication with the second conductor, wherein the second electrode is disposed at the distal end of the elongated member such that the second electrode is disposed axially from the first electrode; wherein the at least one frequency dependent circuit is configured to have a high impedance at the MRI scanner operating frequency in the MHz frequency range to thereby inhibit unwanted MRI related RF-induced tissue heating by the first electrode or the second electrode; wherein the first coiled conductor segment and the second coiled conductor segment are both disposed at the distal end of the elongated member.