Implanted electrical lead for pacemaker
AssigneesChildren's Hospital Los Angeles, University of Southern California
InventorsYaniv Bar-Cohen, Gerald Loeb, Li Zhou, Xiao Yun
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Abstract
An open coiled pacemaker lead is provided that has improved structural stability and functional life in vivo. The open coiled lead includes an electrically conductive material that is coated or covered by a thin layer of electrically insulative material. The coated coiled lead has adequate spacing between adjacent coils, and has a lumen of sufficient diameter, to allow for infiltration of biological connective tissue onto the surface of the coated coil when maintained in vivo for a sufficient amount of time. Infiltration of the connective tissue essentially uniformly along the entire coiled lead strengthens and lengthens the functional life of the coated coil lead.
Claims11
A pacemaker, comprising:
- a cylindrical electronics package having a longitudinal axis;
- a spiral electrode having a longitudinal axis;
- and
- an open coil helical lead having a longitudinal axis and connecting to the electronics package and the spiral electrode;
- wherein the longitudinal axis of the open coil helical lead is curved when the open coil helical lead is in a stressed configuration which maintains the longitudinal axes of the electronics package and the spiral electrode in parallel with each other, and wherein the longitudinal axis of the open coil helical lead is straight when the open coil helical lead is in a resting configuration which maintains the longitudinal axes of the electronics package and the open coil helical lead in parallel with each other, and perpendicular to the longitudinal axis of the spiral electrode;
- and
- wherein the open coil helical lead comprises a lead material and a structure which become embedded in living connective tissue thereby forming a composite material that resists stress fatigue from frequent motion.
A pacemaker, comprising:
- a cylindrical electronics package having a longitudinal axis;
- a spiral electrode having a longitudinal axis;
- and
- an open coil helical lead having a longitudinal axis and comprised of a spring-like material coated with an insulative material and connecting to the electronics package and the spiral electrode;
- wherein the longitudinal axis of the open coil helical lead is curved when the open coil helical lead is in a stressed configuration which maintains the longitudinal axes of the cylindrical electronics package and the spiral electrode in parallel with each other, and wherein the longitudinal axis of the open coil helical lead is straight when the open coil helical lead is in a resting configuration which maintains the longitudinal axes of the cylindrical electronics package and the open coil helical lead in parallel with each other, and perpendicular to the longitudinal axis of the spiral electrode;
- and
- wherein when implanted in human tissue, the open coil helical lead is sized to allow adjacent tissue to penetrate between its coils to form a composite material that resists stress fatigue.
Dependencies are inferred from the claim text.