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US 2026/0295244 A1Published application
Electrode placement apparatus and methods
AssigneeMedtronic, Inc.
InventorsEstelle FRAYSSE, Maurice Verbeek
Life of this patent
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Abstract
Apparatus and methods for placement of electrodes into selected tissue, such as the septal wall separating the left and right ventricles, with, in some cases, access to the septal wall from the right ventricle. Torque sleeves may be used to provide for rotation as needed.
Claims20
A method of implanting a medical electrode system, the method comprising:
- advancing a distal catheter end of a delivery catheter into a right ventricle of a patient's heart;
- securing a catheter fixation structure at the distal catheter end of the delivery catheter at a selected location on the septal wall of the patient's heart after advancing the distal catheter end into the right ventricle;
- advancing a first lead assembly through a delivery lumen in the delivery catheter, wherein the first lead assembly comprises a push tube and a first lead comprising a first electrode and first conductor attached to the first electrode, wherein advancing the first lead assembly comprises pushing the first electrode out of the distal catheter end of the delivery catheter and into the septal wall to locate the first electrode in the septal wall, wherein the first conductor extends proximally from the first electrode into the delivery lumen of the delivery catheter after the first electrode is located in septal wall;
- removing the push tube from the first conductor of the first lead after the first electrode is located in septal wall;
- removing the catheter fixation structure of the delivery catheter from the septal wall after the first electrode is located in septal wall;
- removing the delivery catheter from the first conductor of the first lead after removing the catheter fixation structure of the delivery catheter from the septal wall;
- advancing a second lead over the first conductor of the first lead after removing the delivery catheter from the first conductor of the first lead, wherein at least a portion of the first conductor is located in a first lead lumen in a second lead body while advancing the second lead over the first conductor;
- and
- securing the second lead body to the septal wall by attaching a lead fixation structure at a distal end of the second lead to the septal wall after advancing a second lead over the first conductor of the first lead, wherein the second lead comprises a second electrode located in the right ventricle when the lead fixation structure of the second lead is attached to the septal wall.
6 more elements
A catheter assembly comprising:
- a therapy lead extending along a catheter axis from a proximal lead end to a distal lead end, the therapy lead comprising one or more electrodes proximate the distal lead end;
- a lead fixation structure located at the distal lead end of the therapy lead, the catheter fixation structure configured to attach the distal lead end to tissue;
- a torque sleeve comprising a sleeve lumen extending along a sleeve axis extending from a distal sleeve end to a proximal sleeve end, wherein the therapy lead is located in the sleeve lumen of the torque sleeve;
- and
- a clamp assembly located in a clamping section of the sleeve lumen proximate the distal sleeve end, wherein the clamp assembly is configured to frictionally couple the torque sleeve to the therapy lead when in a clamped state such that rotation of the torque sleeve about the catheter axis causes corresponding rotation of the therapy lead, and wherein the clamp assembly is configured to decouple the torque sleeve from the therapy lead when the clamp assembly is in an unclamped state such that the torque sleeve is configured to be advanced over the therapy lead towards the distal lead end.
2 more elements
A method of implanting a therapy lead, the method comprising:
- advancing a distal lead end of a therapy lead to a selected location in a patient's heart, wherein the therapy lead extends along a catheter axis from a proximal lead end to a distal lead end, the therapy lead comprising one or more electrodes proximate the distal lead end, and wherein a portion of the therapy lead is located in a torque sleeve comprising a sleeve lumen extending along a sleeve axis extending from a distal sleeve end to a proximal sleeve end, wherein the distal sleeve end is located proximate the distal lead end;
- securing a lead fixation structure at the distal lead end of the therapy lead to tissue at a selected location in the patient's heart after advancing the distal lead end to the selected location, wherein the securing comprises rotating the therapy lead about the catheter axis using the torque sleeve while a clamp assembly located in a clamping section of the sleeve lumen proximate the distal sleeve end is in a clamped state in which the clamp assembly frictionally couples the torque sleeve to the therapy lead such that rotation of the torque sleeve about the catheter axis causes corresponding rotation of the therapy lead;
- decoupling the torque sleeve from the therapy lead after securing the catheter fixation structure to tissue at the selected location in the patient's heart by moving the clamp assembly to an unclamped state in which the torque sleeve is able to move along the therapy lead;
- advancing the distal sleeve end over the therapy lead towards the distal lead end after decoupling the torque sleeve from the therapy lead until the distal sleeve end contacts tissue surrounding the selected location;
- and
- moving the clamp assembly back to the clamped state in which the clamp assembly frictionally couples the torque sleeve to the therapy lead such that movement of the torque sleeve along the therapy lead is prevented.
3 more elements
Dependencies are inferred from the claim text.