Catheter Having a Selectively Formable Distal Section

• US 20070225681A1
• Filed: 03/21/2006
• Published: 09/27/2007
• Est. Priority Date: 03/21/2006
• Status: Abandoned Application

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular (Medtronic Plc)
• Inventors: House, Morgan
• Application Number:
  US11/277,062
• Publication Number:
  US 20070225681A1
• Time in Patent Office: Days
• US Class Current: 604/528
• CPC Class Codes: A61M 2025/0161 wherein the distal tips have two or more deflection regions
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/0084 being one or more injection needles
• CPC Class Codes: A61M 25/0147 with movable mechanical means, e.g. pull wires

Abstract

The current invention discloses a delivery catheter with a selectively formable distal section. The catheter comprises a central lumen that is configured to receive a puncture catheter that is used for puncturing the septum of a heart and to emplace devices used for treating mitral regurgitation. The delivery catheter includes control members disposed in a control lumen, and a plurality curved areas can be selectively formed in the distal section of the delivery catheter by applying tension to the control members. A first curve is shaped to conform to the interior of a heart chamber and a combination of the first curve and a second curve allows a clinician to manipulate the distal end of the catheter for selection of the proper vector for deploying a treatment device, or for guiding a treatment device around obstacles in a heart chamber.

Claims

1. A catheter for use in a medical procedure comprising:

an elongate, flexible, generally tubular member having a proximal section, a distal section, a distal tip an exterior surface, and a central lumen;

a control member lumen extending along a majority of the length of the elongate member;

at least at least two elongate, flexible control members, each having a distal end that is affixed to the elongate tubular member and a proximal end, and each control member being disposed in the control member lumen;

the control lumen having at least two openings and at least two attachment points spaced along the distal section thereof, and one control member extends distally from each opening to one of the attachment points; and

the distal section of the catheter being selectively formable into at least two curves by applying tension to the control members such that one curve can be formed for each control member.

2. The catheter of claim 1 wherein the central lumen communicates from an opening in the proximal section of the elongate member, through a majority of the length of the elongate member, and terminates in an opening at the distal tip of the elongate member;

3. The catheter of claim 1 wherein the at least two control members is first control member and a second control member;

the at least two openings in the control member lumen is a first opening that communicates from the lumen to the exterior of the elongate member at a location proximal of the distal tip of the elongate member and a second opening that communicates from the lumen to the exterior of the elongate member at a location distal of the first opening; and

the at least two attachment points is a first attachment point that is distal of the first opening and a second attachment point that is distal of the second opening.

4. The catheter of claim 1 wherein the proximal ends of the at least two control members are each connected to an adjustment member that is operably attached to the proximal section of the elongate member;

and

the adjustment member can be manipulated to apply tension to the control member such that a curve is selectively formed in the distal section of the catheter.

5. The catheter of claim 4 wherein the control member lumen has a proximal opening along the proximal section of the catheter, and the control members extend from the proximal opening to the adjustment member.

6. The catheter of claim 1 wherein the control members are selected from the group consisting of wire, woven metallic cable, non-metallic cord.

7. The catheter of claim 1 wherein the shape of one of the at least two curves is complementary to the interior shape of a chamber of a heart such that the catheter can be braced against the walls of a heart chamber on opposite sides of the chamber.

8. The catheter of claim 1 wherein when the curves are selectively formed in the distal section of the catheter, the directional orientation of the distal end can be manipulated by adjusting tension on the control members.

9. The catheter of claim 1 wherein the at least two elongate, flexible control members comprises more than two control members;

the at least two openings comprises more than two openings;

the at least two attachment points comprises more than two attachment points; and

the at least two curves comprises more than two curves.

10. The catheter of claim 1 wherein the central lumen is configured to receive devices for puncturing the septum in a heart and devices for treating heart valves therein.

11. An apparatus for performing a medical procedure comprising:

an elongate, flexible catheter having a proximal section, a central lumen that communicates from an opening in a proximal section to an opening in the distal tip, a control member lumen, at least two control members, a distal tip, and a distal section that can be selectively formed into at least two curves each having a control line extending from an opening in the control line lumen and across the curve to an attachment point on the catheter; and

a device, disposed in the central lumen of the catheter, for puncturing the septum between two chambers of a heart.

12. The apparatus of claim 11 further comprising a device, disposed in the catheter, for providing therapy to a cardiac valve.

13. The catheter of claim 11 wherein the central lumen communicates from an opening in the proximal section of the catheter, through a majority of the length of the catheter, and terminates in an opening at the distal tip of the catheter;

14. The catheter of claim 11 wherein the at least two control members is first control member and a second control member and the catheter further comprises;

a first opening that communicates from the lumen to the exterior of the elongate member at a location proximal of the distal tip of the elongate member and a second opening that communicates from the lumen to the exterior of the elongate member at a location distal of the first opening; and

a first attachment point that is distal of the first opening and a second attachment point that is distal of the second opening.

15. The catheter of claim 11 wherein the proximal ends of the at least two control members are each connected to an adjustment member that is operably attached to the proximal section of the elongate member;

and

the adjustment member can be manipulated to apply tension to the control member such that a curve is selectively formed in the distal section of the catheter.

16. The catheter of claim 11 wherein the shape of one of the at least two curves is complementary to the interior shape of a chamber such that the catheter can be braced against the walls of a heart chamber on opposite sides of the chamber.

17. A catheter for use in a medical procedure comprising:

an elongate, flexible, generally tubular member having a proximal section, a distal section, a distal end and an exterior surface;

a central lumen that communicates from an opening in the proximal section of the elongate member, through a majority of the length of the elongate member, and terminates in an opening at the distal end of the elongate member;

a control member lumen extending along a majority of the length of the elongate member;

at least a first control member and a second control member, the control members each being flexible, each having a distal end that is affixed to the elongate tubular member and a proximal end, and each control member being disposed in the control member lumen;

the control lumen having a first opening that communicates from the lumen to the exterior of the elongate member at a location in the distal section of the elongate member, but proximal of the distal end of the elongate member;

the first control member extending out of the first opening in the control member lumen and distally along the elongate member, and being affixed to the elongate member at a first attachment point, which is proximal of the distal end of the elongate member;

the control lumen having a second opening that communicates from the lumen to the exterior of the elongate member at a location distal of the first opening, but proximal of the distal end of the member;

the second control member extending out of the second opening in the control member lumen and distally along the elongate member, and being affixed to the elongate member at a second attachment point, which is distal of the first attachment point; and

the proximal ends of the control members each being connected to an adjustment device that is positioned along the proximal section of the elongate member.

18. The catheter of claim 17 wherein the first and second control members are selected from the group consisting of wire, woven metallic cable, non-metallic cord.

19. The catheter of claim 17 wherein the control member lumen has a proximal opening along the proximal section of the catheter, and the control members extend from the proximal opening to the adjustment device.

20. The catheter of claim 17 wherein the proximal end of the first control member is connected to a first adjustment device and the proximal end of the second control member is connected to a second adjustment device;

the first adjustment device being capable of manipulation to apply tension to the first control member sufficient to draw the distal end of the control member toward the first opening in the control lumen such that a first curve is formed in the catheter between the fist opening and the first attachment point;

the second adjustment device being capable of manipulation to apply tension to the second control member sufficient to draw the distal end of the control member toward the second opening in the control lumen such that a second curve is formed in the catheter between the second opening and the second attachment point; and

the first and second curves each having a base being defined by the control member.

21. The catheter of claim 20 wherein the shape of the first curve is complementary to the interior shape of a chamber of a heart such that the catheter can be braced against the walls of a heart chamber on opposite sides of the chamber.

22. A method for providing treatment to a diseased heart valve comprising the steps of:

providing an elongate, flexible catheter having a proximal section, a central lumen that communicates from an opening in a proximal section to an opening in the distal tip, a control member lumen, at least two control members, a distal tip, and a distal section that can be selectively formed into at least two curves each having a control line extending from an opening in the control line lumen and across the curve to an attachment point on the catheter;

inserting the distal end of the catheter into the vasculature of a patient;

navigating the distal end of the catheter into one of the chambers of the patient'"'"'s heart;

manipulating the catheter to form a first curve having a shape that is complementary to the interior of the heart chamber such that the catheter is braced against opposite walls of the heart chamber; and

providing therapeutic treatment to the heart.

23. The method of claim 22 further comprising the steps of:

providing a device, disposed in the central lumen of the catheter, for puncturing the septum between two chambers of a heart;

providing a device, disposed in the catheter, for reducing mitral regurgitation manipulating the catheter to form a second curve in the distal section of the catheter;

manipulating the first curve and the second curve to place the distal end of the catheter in a desired orientation;

extending the device for puncturing the septum from the distal end of the catheter such that the septum is punctured;

delivering the device for reducing mitral regurgitation into the heart; and

securing the device for reducing mitral regurgitation at a pre-selected location in the heart.