Catheter distal assembly with pull wires

• US 7,063,682 B1
• Filed: 02/21/2000
• Issued: 06/20/2006
• Est. Priority Date: 12/19/1996
• Status: Expired due to Fees

• Current Assignee: EP Technology (Boston Scientific Corporation)
• Original Assignee: EP Technology (Boston Scientific Corporation)
• Inventors: Fleischman, Sidney D., Whayne, James G.
• Primary Examiner(s): RODRIGUEZ, CRIS LOIREN
• Application Number:
  US09/507,613
• Time in Patent Office: 2,311 Days
• Field of Search: 604/95.01, 604/528, 604/95.04, 600372-374, 600146-149, 606/41, 607/122, 607100-102
• US Class Current: 604/95.04
• 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 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2018/00065 porous
• CPC Class Codes: A61B 2018/00553 Sphincter
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00797 measured by multiple temperature sensors
• CPC Class Codes: A61B 2018/1407 Loop
• CPC Class Codes: A61B 2018/142 at least partly surrounding the target, e.g. concave, curved or in the form of a cave
• CPC Class Codes: A61B 2018/1467 using more than two electrodes on a single probe
• CPC Class Codes: A61B 2018/1861 with an instrument inserted into a body lumen or cavity, e.g. a catheter
• CPC Class Codes: A61M 2025/015 Details of the distal fixation of the movable mechanical means
• CPC Class Codes: A61M 2025/0163 Looped catheters
• CPC Class Codes: A61M 25/0043 characterised by structural features
• CPC Class Codes: A61M 25/01 Introducing, guiding, advancing, emplacing or holding catheters A61M25/10 takes precedence
• 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
• CPC Class Codes: A61M 25/0152 with pre-shaped mechanisms, e.g. pre-shaped stylets or pre-shaped outer tubes
• CPC Class Codes: C08L 2201/12 Shape memory

Abstract

A catheter assembly having a sheath, which includes a side wall enclosing an interior bore, and a distal region. The assembly also has a bendable catheter tube, which is carried for sliding movement in the interior bore. A pull wire also runs through the interior bore of the sheath, preferably within a lumen. The catheter tube has a distal portion with a coupling which joins the distal portion of the catheter tube and the distal portion of the pull wire. Relative movement of the pull wire and the sheath causes bending of the catheter tube outwardly through the opening, in response to sliding movement of the catheter tube within the interior bore toward the distal region of the sheath.

Claims

1. A catheter assembly, comprising:

a handle including a handle body and a strain relief element;

an elongate catheter body defining a distal portion, a proximal portion associated with the handle, and a size and flexibility suitable for insertion into a human body; and

a control element defining a distal portion operably connected to the distal portion of the catheter body and a proximal portion extending along the exterior surface of the catheter body and secured to the strain relief element.

2. A catheter assembly as claimed in claim 1, wherein the control element comprises a pull wire.

3. A catheter assembly as claimed in claim 1, wherein the control element defines a distal end, the catheter body defines a distal end, and the distal end of the control element is associated with the distal end of the catheter body.

4. A catheter assembly as claimed in claim 1, wherein the control element is secured to the strain relief element by a substantially tubular member which surrounds respective portions of the strain relief element and the control element.

5. A catheter assembly as claimed in claim 4, wherein the substantially tubular member comprises heat shrink tubing.

6. A catheter assembly as claimed in claim 1, further comprising:

a sheath surrounding at least respective portions of the catheter body and control element.

7. A catheter assembly as claimed in claim 1, further comprising:

a physiological treatment element carried by the distal portion of the elongate catheter body.

8. A catheter assembly as claimed in claim 7, wherein the physiological treatment element comprises a diagnostic element.

9. A catheter assembly as claimed in claim 7, wherein the physiological treatment element comprises a therapeutic element.

10. A catheter assembly as claimed in claim 7, wherein the physiological treatment element comprises an electrode element.

11. A catheter assembly as claimed in claim 10, wherein the electrode element comprises a porous electrode element.

12. A catheter assembly as claimed in claim 10, wherein the electrode element comprises a flexible electrode element.

13. A catheter assembly, comprising:

a handle including a handle body;

an elongate catheter body defining a distal portion, a proximal portion associated with the handle, and a size and flexibility suitable for insertion into a human body;

a control element defining a distal portion operably connected to the distal portion of the catheter body and a proximal portion extending along the exterior surface of the catheter body; and

an apparatus, located in spaced relation to the handle body, adapted to secure the proximal portion of the control element in predetermined relation to the catheter body.

14. A catheter assembly as claimed in claim 13, wherein the handle includes a strain relief element associated with the handle body and the apparatus includes the strain relief element.

15. A catheter assembly as claimed in claim 14, wherein the apparatus further includes a device that secures the proximal portion of the control element to the strain relief element.

16. A catheter assembly as claimed in claim 15, wherein the device comprises an anchoring element.

17. A catheter assembly as claimed in claim 16, wherein the anchoring element comprises a tube.

18. A catheter assembly as claimed in claim 13, wherein the apparatus covers a region of the proximal portion of the control element and a region of the proximal portion of the catheter body.

19. A catheter assembly as claimed in claim 13, wherein the apparatus comprises an anchoring element that secures the proximal portion of the control element to the proximal portion of the catheter body.

20. A catheter assembly as claimed in claim 19, wherein the anchoring element comprises a tube.

21. A catheter assembly as claimed in claim 13, wherein the control element comprises a pull wire.

22. A catheter assembly as claimed in claim 13, further comprising:

a sheath surrounding at least respective portions of the catheter body and control element.

23. A catheter assembly as claimed in claim 13, further comprising:

a physiological treatment element carried by the distal portion of the elongate catheter body.

24. A catheter assembly as claimed in claim 23, wherein the physiological treatment element comprises a diagnostic element.

25. A catheter assembly as claimed in claim 23, wherein the physiological treatment element comprises a therapeutic element.

26. A catheter assembly as claimed in claim 23, wherein the physiological treatment element comprises an electrode element.

27. A catheter assembly as claimed in claim 26, wherein the electrode element comprises a porous electrode element.

28. A catheter assembly as claimed in claim 26, wherein the electrode element comprises a flexible electrode element.