# US 2024/0189601 A1 · Implantable lead having variable electrode spacing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0189601 A1 - Document ID: US20240189601A1 - Status: Published application - Kind: A1 - Application number: 18/531,530 - Filed: 2023-12-06 - Published: 2024-06-13 - Earliest claimed: 2022-12-09 - Assignees: Pacesetter, Inc. - Applicants: Pacesetter, Inc. - Inventors: Steve Chantasirivisal; Keith Victorine; Wesley Alleman; Robert Shaw - Web page: https://patentgrep.com/patent/US20240189601A1 ## CPC - A61N 1/362: Heart stimulators (heart defibrillators A61N1/39) - A61N 1/0573: {chacterised by means penetrating the heart tissue, e.g. helix needle or hook} - A61N 1/3956: {Implantable devices for applying electric shocks to the heart, e.g. for cardioversion} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) ## 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. ## Claims ### Claim 1 An implantable lead, comprising: an inner lead subassembly including a helical electrode mounted on an inner coil 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 lead subassembly, 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. ### Claim 2 (depends on 1) The implantable lead of claim 1, wherein the threaded interface includes a tubular body having the threaded surface. ### Claim 3 (depends on 2) The implantable lead of claim 2, wherein the threaded surface contacts the inner lead subassembly. ### Claim 4 (depends on 1) The implantable lead of claim 1, wherein a distal ring face of the ring electrode is exposed, and wherein the ring electrode is an active electrode. ### Claim 5 (depends on 1) The implantable lead of claim 1, wherein a distal ring face of the ring electrode is covered by a tip covering, and wherein the ring electrode is a passive electrode. ### Claim 6 (depends on 1) The implantable lead of claim 1, wherein the outer lead subassembly includes a shock coil. ### Claim 7 (depends on 1) The implantable lead of claim 1, wherein the outer lead subassembly includes one or more atrial sensing rings. ### Claim 8 (depends on 1) The implantable lead of claim 1, wherein the inner lead subassembly includes an electrode mount mounted on the inner coil, wherein the helical electrode is mounted on the electrode mount, and wherein the inner coil has a stylet lumen extending along the longitudinal axis to a proximal mount face of the electrode mount. ### Claim 9 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 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 lead subassembly 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. ### Claim 10 (depends on 9) The implantable lead of claim 9, wherein the threaded interface includes a tubular body having the threaded surface. ### Claim 11 (depends on 10) The implantable lead of claim 10, wherein the threaded interface is coupled to the inner lead subassembly, and wherein the threaded surface contacts the outer lead subassembly. ### Claim 12 (depends on 9) The implantable lead of claim 9, wherein a distal ring face of the ring electrode is exposed, and wherein the ring electrode is an active electrode. ### Claim 13 (depends on 9) The implantable lead of claim 9, wherein a distal ring face of the ring electrode is covered by a tip covering, and wherein the ring electrode is a passive electrode. ### Claim 14 (depends on 9) The implantable lead of claim 9, wherein the outer lead subassembly includes a shock coil. ### Claim 15 (depends on 9) The implantable lead of claim 9, wherein the outer lead subassembly includes an atrial sensing ring. ### Claim 16 (depends on 9) The implantable lead of claim 9, wherein the inner lead subassembly includes an electrode mount mounted on the inner coil, wherein the helical electrode is mounted on the electrode mount, and wherein the inner coil has a stylet lumen extending along the longitudinal axis to a proximal mount face of the electrode mount. ### Claim 17 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, 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 lead subassembly; 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. ### Claim 18 (depends on 17) The method of claim 17, wherein the threaded interface includes a tubular body having the threaded surface. ### Claim 19 (depends on 18) The method of claim 18, wherein the outer lead subassembly includes the threaded interface, and wherein the threaded surface contacts the inner lead subassembly. ### Claim 20 (depends on 18) The method of claim 18, wherein the inner lead subassembly includes the threaded interface, and wherein the threaded surface contacts the outer lead subassembly.