Method for manufacturing an implantable lead and implantable lead

Patent metadata

Field	Value
Publication number	US-2026041908-A1
Application number	US-202319104286-A
Country	US
Kind code	A1
Filing date	Jul 3, 2023
Priority date	Sep 2, 2022
Publication date	Feb 12, 2026
Grant date	—

Abstract

A method for manufacturing an implantable lead includes: providing an annular first electrode and an annular second electrode, a diameter of an inner surface of the first electrode being larger than a diameter of an outer surface of the second electrode; providing a wire comprising an electrically conductive core, the core being surrounded by an electrically insulating sheathing in a sheathed wire portion; aligning both electrodes; positioning at least a part of the sheathed wire portion opposite to the inner surface of the first electrode and/or to the outer surface of the second electrode; connecting the wire to both electrodes by pressing the electrodes together along a common central axis, wherein an axial force is applied to the sheathed wire portion by both electrodes so that at least part of the sheathing is removed from the core.

First claim

1 . A method for manufacturing an implantable lead, the method comprising:
providing an annular first electrode and an annular second electrode, a diameter of an inner surface of the first electrode being larger than a diameter of an outer surface of the second electrode; providing at least one wire comprising an electrically conductive core, the core being surrounded by an electrically insulating sheathing in a sheathed wire portion aligning the first electrode relative to the second electrode so that their individual central axes form a common central axis; positioning at least a part of the sheathed wire portion opposite to the inner surface of the first electrode and/or opposite to the outer surface of the second electrode; and electrically and mechanically connecting the wire to the first electrode and the second electrode by pressing the first electrode and the second electrode together along the common central axis; wherein an axial force in a direction parallel to the common central axis is applied to the sheathed wire portion by the first electrode and the second electrode being pressed together so that at least a part of the sheathing is removed from the core to obtain an exposed wire portion; wherein at least a part of the exposed wire portion is inserted into an overlap area where the inner surface of the first electrode at least partially overlaps the outer surface of the second electrode and compressed in the overlap area by the first electrode and the second electrode.

2 . The method of claim 1 , further comprising:
providing an elongated lead body and at least one electrically conductive contact element for contacting body tissue; electrically and mechanically connecting a free end of the wire to the contact element; attaching the contact element to a distal end of the lead body; attaching the second electrode which is pressed together with the first electrode to a proximal end of the lead body.

3 . An implantable lead, comprising:
an annular first electrode; an annular second electrode, a diameter of an inner surface of the first electrode being larger than a diameter of an outer surface of the second electrode; at least one wire comprising an electrically conductive core, the core being exposed in an exposed wire portion; wherein the first electrode and the second electrode are arranged concentrically to each other so that the inner surface of the first electrode at least partially overlaps the outer surface of the second electrode in an overlap area; wherein at least a part of the exposed wire portion is inserted into the overlap area and compressed therein by the first electrode and the second electrode; wherein a free end of the wire protrudes from the overlap area in a direction parallel to a common central axis of the first electrode and the second electrode.

4 . The lead of claim 3 ,
wherein the compressed part of the exposed wire portion has a longitudinal axis parallel to the common central axis.

5 . The lead of claim 3 ,
wherein the core is surrounded by an electrically insulating sheathing a sheathed wire portion; wherein at least a part of the sheathed wire portion protrudes as the free end of the wire from the overlap area.

6 . The lead of claim 5 ,
wherein a part of the sheathed wire portion is inserted into the overlap area and compressed therein by the first electrode and the second electrode

7 . The lead of claim 3 ,
wherein a first free end of the wire protrudes from the overlap area in a first direction parallel to the common central axis and a second free end of the wire protrudes from the overlap area in a second direction opposite to the first direction.

8 . The lead of claim 3 ,
wherein an outer diameter of the wire is 0.5 mm or less, particularly 0.2 mm or less, more particularly 0.1 mm or less.

9 . The lead of claim 3 ,
wherein the diameter of the outer surface of the second electrode is 3 mm or less, particularly 2 mm or less, particularly 1 mm or less.

10 . The lead of claim 3 ,
wherein the diameter of the outer surface of the second electrode differs from the diameter of the inner surface of the first electrode by 10% or less, particularly by 5% or less.

11 . The lead of claim 3 ,
wherein the diameter of the outer surface of the second electrode differs from the diameter of the inner surface of the first electrode by 0.5 mm or less, particularly by 0.2 mm or less, more particularly by 0.1 mm or less.

12 . The lead of claim 3 ,
wherein the first electrode has a greater wall thickness than the second electrode.

13 . The lead of claim 3 ,
wherein a wall thickness of the first electrode differs from a wall thickness of the second electrode by 10% to 35%.

14 . The lead claim 3 ,
wherein the first electrode and the second electrode are made of the same material.

15 . The lead of claim 3 ,
wherein the wire is a stranded wire.

Assignees

• Biotronik Se & Co Kg

Inventors

• Zimpel Dominik
• Thuerkow Andreas
• Feldmann Joerg

Classifications

• H01R43/027

  for connecting conductors by clips · CPC title

• H01R4/5033

  using wedge or pin penetrating into the end of a wire in axial direction of the wire · CPC title

• H01R4/60

  Connections between or with tubular conductors (H01R4/56 takes precedence) · CPC title

• H01R2201/12

  for medicine and surgery · CPC title

• A61N1/36062

  Spinal stimulation · CPC title