Implantable lead having variable electrode spacing
AssigneePacesetter, Inc.
InventorsSteve Chantasirivisal, Keith Victorine, Wesley Alleman, Robert Shaw
Life of this patent
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Abstract
An implantable lead includes an inner lead subassembly contained within and movable relative to an outer lead subassembly. The inner lead subassembly has a helical electrode to pace a target anatomy. The outer lead subassembly includes a ring electrode to sense or pace the target anatomy. A threaded interface interconnects the inner lead subassembly and the outer lead subassembly such that relative rotation of the lead subassemblies causes relative axial movement between the helical electrode and the ring electrode. Other embodiments are also described and claimed.
Claims20
An implantable lead, comprising:
- an inner lead subassembly including a helical electrode mounted on an inner coil positioned within an inner jacket, the inner coil and the inner jacket extending along a longitudinal axis;
- and
- an outer lead subassembly including an outer coil having a central lumen containing the inner coil, and a ring electrode mounted on the outer coil, wherein the outer lead subassembly includes a threaded interface having a threaded surface between the outer lead subassembly and the inner jacket, and wherein the threaded surface converts rotation of the inner lead subassembly relative to the outer lead subassembly into relative axial movement of the helical electrode relative to the ring electrode.
An implantable lead, comprising:
- an outer lead subassembly including an outer coil having a central lumen, and a ring electrode mounted on the outer coil;
- and
- an inner lead subassembly including an inner coil positioned within an inner jacket, the inner coil and the inner jacket extending along a longitudinal axis within the central lumen, and a helical electrode mounted on the inner coil, wherein the inner lead subassembly includes a threaded interface having a threaded surface between the inner jacket and the outer lead subassembly, and wherein the threaded surface converts rotation of the inner lead subassembly into axial movement of the helical electrode relative to the ring electrode.
A method, comprising:
- advancing an implantable lead to a target anatomy, wherein the implantable lead includes
- an inner lead subassembly including a helical electrode mounted on an inner coil, the inner coil positioned within an inner jacket,
- an outer lead subassembly including an outer coil having a central lumen containing the inner coil, and a ring electrode mounted on the outer coil, and
- a threaded interface having a threaded surface between the outer lead subassembly and the inner jacket;
- and
- rotating the inner lead subassembly relative to the outer lead subassembly to cause the helical electrode to move axially relative to the ring electrode.
Dependencies are inferred from the claim text.