IMPLANTABLE LEAD HAVING MULTI-PLANAR SPIRAL INDUCTOR FILTER

摘要

A multilayer helical wave filter having a primary resonance at a selected RF diagnostic or therapeutic frequency or frequency range, includes an elongated conductor forming at least a portion of an implantable medical lead. The elongated conductor includes a first helically wound segment having at least one planar surface, a first end and a second end, which forms a first inductive component, and a second helically wound segment having at least one planar surface, a first end and a second end, which forms a second inductive element. The first and second helically wound segments are wound in the same longitudinal direction and share a common longitudinal axis. Planar surfaces of the helically wound segments face one another, and a dielectric material is disposed between the facing planar surfaces of the helically wound segments and between adjacent coils of the helically wound segments, thereby forming a capacitance.

主权项

1. An implantable lead extending from a proximal lead end to a distal lead end, wherein the proximal lead end is configured to be removably connectable to electronic circuits of an implantable medical device, the implantable lead comprising:
a) at least one electrode configured to be placed in contact with biological cells inside a body; b) at least one implantable lead wire extending from an electrical connection to the electrode to a proximal lead wire end at or adjacent to the proximal lead end; c) a first conductive circuit trace as a series portion of the lead wire, wherein the first conductive circuit trace is configured to form a first planar spiral inductor with a first multi-turn loop current; d) a second conductive circuit trace as a series portion of the lead wire, wherein the second conductive circuit trace is configured to form a second planar spiral inductor with a second multi-turn loop current; e) wherein the first and second spiral inductors are in a stacked relationship with a dielectric substrate there between; f) wherein a center of each of the first and second spiral inductors is electrically coupled together; and g) wherein the first multi-turn loop current of the first spiral inductor is in the same direction as the second multi-turn loop current of the second spiral inductor.