Implantable active fixation lead with biodegradable helical tip

摘要

Described is an implantable medical device comprising housing having a distal end and a proximal end, the proximal end fixedly coupled to the distal end of the lead body, a coupler rotatably disposed within the housing, the coupler having a proximal end and a distal end, and a helical electrode fixedly secured to the distal end of the coupler. The helical electrode comprises a proximal axial length portion that comprises a non-degradable material, and a distal axial length portion that comprises a biodegradable material. The proximal and distal portions may include concave/convex surfaces or threaded portions. The coupler and the helical electrode are configured to rotate and therefore translate relative to the housing.

主权项

1. An implantable medical device comprising:
a housing having a distal end and a proximal end; a coupler rotatably disposed within the housing, the coupler having a proximal end and a distal end; and a helical electrode fixedly secured to the distal end of the coupler and configured with the coupler to translate relative to the housing between fully extended and fully retracted positions, the helical electrode comprising:
a proximal axial length portion that comprises a non-degradable material having a first surface;a distal axial length portion that comprises a biodegradable material having a second surface that is complementary to the first surface; andan interface between the biodegradable material and the non-degradable material including the first surface and the second surface, wherein the second surface comprises a convex surface and the first surface comprises a concave surface that is complementary to the convex surface.