CATHETER WITH BIASED PLANAR DEFLECTION

• US 20110077498A1
• Filed: 09/29/2009
• Published: 03/31/2011
• Est. Priority Date: 09/29/2009
• Status: Active Grant

• Current Assignee: Biosense Webster Incorporated (Johnson & Johnson)
• Original Assignee: Biosense Webster Incorporated (Johnson & Johnson)
• Inventors: McDaniel, Benjamin D.
• Granted Patent: US 9,101,733 B2
• Time in Patent Office: Days
• US Class Current: 600/374
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2018/00023 closed, i.e. without wound contact by the fluid
• CPC Class Codes: A61B 2018/00839 Bioelectrical parameters, e.g. ECG, EEG
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2218/002 Irrigation
• CPC Class Codes: A61B 2218/007 Aspiration
• CPC Class Codes: A61B 5/283 Invasive
• CPC Class Codes: A61M 2025/004 characterized by lumina being arranged circumferentially
• CPC Class Codes: A61M 2025/015 Details of the distal fixation of the movable mechanical means
• CPC Class Codes: A61M 25/0052 Localized reinforcement, e.g. where only a specific part of the catheter is reinforced, for rapid exchange guidewire port
• CPC Class Codes: A61M 25/0144 having flexible regions as a result of inner reinforcement means, e.g. struts or rods
• CPC Class Codes: A61M 25/0147 with movable mechanical means, e.g. pull wires

Abstract

An improved steerable catheter with biased, in-plane bi-directional deflection has an elongated catheter body, a deflectable intermediate section having a tubing with at least a first and a second off-axis opposing lumens for puller wires that define a plane of deflection, and a control handle at a proximal end of the catheter body. The deflectable intermediate section includes at least two elongated bias members that extend along the length and lie on a plane perpendicular to the plane of deflection so as to resist flexure outside of the plane of deflection. In a more detailed embodiment, the deflectable intermediate section has an integrated tubular construction that includes an inner layer, a braided mesh surrounding the inner layer and an outer layer, where the bias members can be situated between the inner layer and the braided mesh, or between the braided mesh and the outer layer.

Claims

1. A steerable catheter comprising:

an elongated catheter body;

a deflectable intermediate section comprising an integrated tubing construction with at least two off-axis lumens defining a plane of deflection, the deflectable intermediate section further comprising at least two bias members extending longitudinally along the intermediate section at opposing locations defining a transverse axis that is generally perpendicular to the plane of deflection,

a first puller wire extending through the first lumen, and a second puller wire extending through a second lumen,

a control handle at the proximal end of the catheter body, adapted for an operator to manipulate movement of the puller wire for deflecting the intermediate section,

wherein the intermediate section is biased by the bias members to remain generally within the plane of deflection.

2. A catheter of claim 1, wherein the deflectable intermediate section further comprises a tubular construction comprising an inner layer, a braided mesh surrounding the inner layer and an outer layer, wherein the bias members are integrated between the inner layer and the braided mesh.

3. A catheter of claim 1, wherein the deflectable intermediate section further comprises a tubular construction comprising an inner layer, a braided mesh, surrounding the inner layer and an outer layer, wherein the bias members are integrated between the braided mesh and the outer layer.

4. A catheter of claim 2 wherein the inner layer is formed with said lumens.

5. A catheter of claim 4, where the inner layer is formed with at least three lumens.

6. A catheter of claim 3, wherein the inner layer is formed with said lumens.

7. A catheter of claim 3, wherein the inner layer is formed with at least three lumens.

8. A catheter of claim 1, further comprising a tip section distal the intermediate section.

9. A catheter of claim 1, wherein the bias members are constructed of a material selected from the group consisting of:

metal, metal alloys, stainless steel, nitinol, ceramic, carbon, plastics, and combinations thereof.

10. A catheter comprising:

an elongated, flexible tubular catheter body having proximal and distal ends and a lumen extending therethrough;

a deflectable intermediate section at the distal end of the catheter body, the intermediate section comprising a flexible integrated tubing construction having at least one pair of diametrically-opposed lumens defining a first plane;

a tip section at a distal end of the intermediate section;

a control handle at the proximal end of the catheter body;

first and second puller wires, each extending through a different lumen of the intermediate section and through the lumen of the catheter body, each puller wire having a proximal end anchored to the control handle and a distal end anchored at a location at or near the distal end of the intermediate section, whereby the first and second puller wires are longitudinally moveable relative to the catheter body to cause deflection of the intermediate section; and

two elongated bias members, each extending along the intermediate section, the two bias members defining a second plane perpendicular to the first plane,

wherein the bias members bias the intermediate section to maintain the perpendicular relationship between the first and second planes when deflected by the puller wires.

11. A catheter of claim 10, wherein the integrated construction comprises an inner layer, a braided mesh and an outer layer, wherein the bias members are situated between the inner layer and the braided mesh.

12. A catheter of claim 10, wherein the integrated construction comprises an inner layer, a braided mesh and an outer layer, wherein the bias members are situated between the braided mesh and the outer layer.

13. A catheter of claim 10, wherein the bias members are constructed of a material selected from the group consisting of:

metal, metal alloys, stainless steel, nitinol, ceramic, carbon, plastics, and combinations thereof.

14. A catheter of claim 12, wherein the outer layer is extruded.

15. A catheter of claim 13, wherein the outer layer is extruded.

16. A catheter of claim 10, wherein the tip section includes a tip electrode adapted for tissue ablation.

17. A catheter of claim 10, wherein the tip section includes at least one ring electrode adapted for mapping.

18. A catheter of claim 16, wherein the tip electrode is adapted for irrigation of fluid.

19. A catheter comprising:

an elongated catheter body,

a deflectable section distal the catheter body, the section including an inner layer and an outer layer, and a braided mesh between the inner and the outer layers, the section also having at least two elongated bias members integrated between the inner and the outer layers, the bias members extending along opposing locations of the section and lying on a plane;

at least one puller wire extending through the catheter body and the section;

a tip section distal the catheter body, the tip section adapted for tissue ablation; and

a control handle at a proximal end of the catheter body, adapted for an operator to manipulate deflection of the section via the puller wire,

wherein the bias member resists flexure within the plane with the section is deflected.

20. A catheter comprising:

an elongated catheter body,

a deflectable section distal the catheter body, the section including an inner layer and an outer layer and a central lumen, and a braided mesh between the inner and the outer layers, the section also having at least two elongated bias members integrated between the inner and the outer layers, the bias members extending along opposing locations of the section and lying on a plane;

at least a tubing extending through the central lumen of the deflectable section, the tubing being fixedly attached to an inner wall defining the central lumen;

at least one puller member extending through the tubing;

a tip section distal the catheter body, the tip section adapted for tissue ablation; and

a control handle at a proximal end of the catheter body, adapted for an operator to manipulate deflection of the deflectable section via the puller member,

wherein the bias member resists flexure within the plane with the deflectable section is deflected.