Deflectable catheter shaft section

Patent metadata

Field	Value
Publication number	US-11844910-B2
Application number	US-202117195098-A
Country	US
Kind code	B2
Filing date	Mar 8, 2021
Priority date	Jun 5, 2014
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

Abstract

A deflectable catheter shaft section is disclosed comprising an elongated body extending along a longitudinal axis with a distal end and a proximal end. First and second pull wires can extend along the elongated body and can have a proximal end and a distal end. First and second pull wire liners can be disposed over a portion of one of the first and second pull wires, respectively. Each of the first and second pull wires can have a proximal end and a distal end. A first gap can exist between the proximal end of the first pull wire liner and the proximal end of the elongated body and a second gap can exist between the proximal end of the second pull wire liner and the proximal end of the elongated body.

First claim

What is claimed is:

1. A deflectable catheter shaft section comprising:
an elongated body extending along a longitudinal axis and comprising a distal end and a proximal end;
first and second pull wires that extend along the elongated body;
first and second pull wire liners, each disposed over a portion of one of the first and second pull wires, respectively, wherein each of the first and second pull wire liners has a proximal end and a distal end; and
a first gap between the proximal end of the first pull wire liner and the proximal end of the elongated body and a second gap between the proximal end of the second pull wire liner and the proximal end of the elongated body,
wherein the distal ends of the first and second pull wire liners are coupled to a pull ring disposed at the distal end of the elongated body.

2. The deflectable catheter shaft section of claim 1 , wherein:
the first gap is a first annular lumen that surrounds the first pull wire between the proximal end of the first pull wire liner and the proximal end of the elongated body; and
the second gap is a second annular lumen that surrounds the second pull wire between the proximal end of the second pull wire liner and the proximal end of the elongated body.

3. The deflectable catheter shaft section of claim 1 , wherein the first and second pull wire liners are diametrically-opposed.

4. The deflectable catheter shaft section of claim 1 , wherein:
a bendable stiffening member is disposed over the first pull wire along a portion of the first gap; and
the bendable stiffening member has a proximal end and a distal end.

5. The deflectable catheter shaft section of claim 4 , wherein the distal end of the bendable stiffening member is spaced apart from the proximal end of the first pull wire liner and the proximal end of the bendable stiffening member is spaced apart from the proximal end of the elongated body.

6. The deflectable catheter shaft section of claim 1 , further comprising a pocket at the distal end of the elongated body configured for attachment of the pull ring and tip assembly, wherein the pocket is defined by a recessed area in the distal end of the elongated body.

7. The deflectable catheter shaft section of claim 6 , wherein a distal end of each of the first and second pull wires is connected to the pull ring disposed in the pocket at the distal end of the elongated body.

8. The deflectable catheter shaft section of claim 1 , wherein an inner diameter of the pull wire liner is in a range of 0.0105 inches to 0.0120 inches and an outer diameter of the pull wire liner is in a range of 0.0140 inches to 0.0180 inches.

9. A deflectable catheter shaft section comprising:
an elongated body extending along a longitudinal axis and comprising a distal end and a proximal end;
first and second pull wires that extend along the elongated body;
first and second pull wire liners each disposed over a portion of one of the first and second pull wires, respectively, wherein each of the first and second pull wire liners has a proximal end and a distal end; and
a first gap between the proximal end of the first pull wire liner and the proximal end of the elongated body and a second gap between the proximal end of the second pull wire liner and the proximal end of the elongated body, wherein a longitudinal length of the first gap is the same as the longitudinal length of the second gap,
wherein the distal ends of the first and second pull wire liners are coupled to a pull ring disposed at the distal end of the elongated body.

10. The deflectable catheter shaft section of claim 9 , wherein:
each of the first and second pull wires has a proximal end and a distal end; and
the distal end of each of the first and second pull wires is connected to a pull ring that is attached within a pocket at the distal end of the elongated body.

11. The deflectable catheter shaft section of claim 10 , wherein each of the first and second pull wire liners comprise polytetrafluoroethylene.

12. The deflectable catheter shaft section of claim 10 , wherein the deflectable catheter shaft section is configured to symmetrically deflect along a plane defined by the first and second pull wires.

13. The deflectable catheter shaft section of claim 9 , further comprising a bendable stiffening member disposed over the first pull wire, between the proximal end of the first pull wire liner and the distal end of the elongated body.

14. The deflectable catheter shaft section of claim 13 , wherein the bendable stiffening member includes a spring pack disposed over the first pull wire.

15. A deflectable catheter shaft section comprising:
an elongated body extending along a longitudinal axis and comprising a distal end and a proximal end;
first and second pull wires that extend along the elongated body;
first and second pull wire liners, each disposed over a portion of one of the first and second pull wires, respectively, wherein each of the first and second pull wire liners has a proximal end and a distal end; and
a first gap between the proximal end of the first pull wire liner and the proximal end of the elongated body and a second gap between the proximal end of the second pull wire liner and the proximal end of the elongated body, wherein the deflectable catheter shaft section is configured to symmetrically deflect along a plane defined by the first and second pull wires,
wherein the distal ends of the first and second pull wire liners are coupled to a pull ring disposed at the distal end of the elongated body.

16. The deflectable catheter shaft section of claim 15 , wherein a distal end of the first and second pull wires.

17. The deflectable catheter shaft section of claim 15 , further comprising a cylindrical braid structure disposed over the elongated body.

18. The deflectable catheter shaft section of claim 15 , wherein a longitudinal length of the first gap is the same as the longitudinal length of the second gap.

19. The deflectable catheter shaft section of claim 15 , wherein the first and second pull wire liners are diametrically-opposed.

20. The deflectable catheter shaft section of claim 15 , wherein each of the first and second pull wire liners comprise polytetrafluoroethylene.

Assignees

• St Jude Medical Cardiology Div Inc

Inventors

• Helgeson Zachary L
• Tegg Troy T
• Houck Alexander C
• Khieu Xuan Y
• Gonzalez Salome A
• Mom Somally
• Her John

Classifications

• A61M25/0147 Primary

  with movable mechanical means, e.g. pull wires · CPC title

• A61B18/1492

  having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence) · CPC title

• A61M25/0141

  having flexible regions as a result of using materials with different mechanical properties · CPC title

• A61M2025/015

  Details of the distal fixation of the movable mechanical means · CPC title

• A61M2210/12

  Blood circulatory system · CPC title