Thread electrode assembly
AssigneeMedtronic, Inc.
InventorsKeith J. Proctor, John D. Doring
Life of this patent
Estimating the term…
Abstract
A threaded pacing electrode assembly for use in implantable electrical leads. The electrode is provided with an exposed portion adapted to make electrical contact with body tissue and with a cylindrical portion proximal to the exposed portion provided with a helical screw thread. A conductor coil which has an inner diameter smaller than the outer diameter of the cylindrical portion is mounted to the exterior of the cylindrical portion, coiled within the screw thread. A transparent insulating sleeve covers the cylindrical portion, is frictionally retained by the thread, and assists in maintaining the conductor coils in contact with the cylindrical portion.
Claims6
An electrode lead comprising:
- a coiled conductor having a proximal end and a distal end;
- a tubular insulative sheath having a proximal end, a distal end, and a central lumen in which said coiled conductor is located;
- and
- an electrode mounted to the distal end of said insulative sheath and having a distal portion exposed to the exterior of said insulative sheath and a cylindrical portion proximal to said distal portion, located within the lumen of said insulative sheath, wherein said cylindrical portion of said electrode is provided with a helical screw thread and said coiled conductor is mounted around said cylindrical portion, the coils of said coiled conductor lying between the coils of said helical screw thread, the threads of said helical screw thread extending radially beyond the coils of said coiled conductor and said cylindrical portion of said electrode having an outer diameter greater than the inner diameter of said coiled conductor in its relaxed state.
Dependencies are inferred from the claim text.