SYSTEM AND METHOD FOR DENERVATION

• US 20170196638A1
• Filed: 01/13/2016
• Published: 07/13/2017
• Est. Priority Date: 01/13/2016
• Status: Active Grant

• Current Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories Incorporated)
• Inventors: Magana, Jesus, Ngo, Michael, Stankus, John, Serna, Benjamyn
• Granted Patent: US 10,448,994 B2
• Time in Patent Office: Days
• 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 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2018/00214 Expandable means emitting energy, e.g. by elements carried thereon
• CPC Class Codes: A61B 2018/00404 Blood vessels other than those in or around the heart
• CPC Class Codes: A61B 2018/00434 Neural system
• CPC Class Codes: A61B 2018/00511 Kidney
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/1435 Spiral
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

A method for manufacturing a shaping structure having a generally helical profile and configured to support electrodes for delivering electric energy into a cylindrical lumen of a patient. The method comprises providing a mandrel with a circular cylindrical shape and forming a first hole in the mandrel along the elongate axis, such that opposing ends of a bore of the first hole emerge at the proximal end and at the distal end; forming a second hole in the mandrel to extend from the curved surface to connect with the first hole; wrapping a metal wire around the mandrel; and inserting opposing ends of the metal wire into the second and the third hole respectively, and threading the opposing ends of the metal wire until they emerge from the opposing ends of the bore of the first hole; finally, heating the mandrel and the wire.

Claims

1. A method for manufacturing a shaping structure having a generally helical profile and configured to support electrodes for delivering electric energy into a cylindrical lumen of a patient, the method comprising:

providing a mandrel with a circular cylindrical shape and having a proximal end and a distal end, a curved surface between the proximal end and the distal end, and an elongate axis;

forming a first hole in the mandrel along the elongate axis, such that opposing ends of a bore of the first hole emerge at the proximal end and at the distal end;

forming a second hole in the mandrel to extend from the curved surface to connect with the first hole, the second hole lying in a first radial plane of the mandrel;

forming a third hole in the mandrel to extend from the curved surface to connect with the first hole, the third hole lying in a second radial plane of the mandrel;

wrapping a metal wire around the mandrel in an area of the mandrel between the second hole and the third hole;

inserting opposing ends of the metal wire into the second and the third hole respectively, and threading the opposing ends of the metal wire until they emerge from the opposing ends of the bore of the first hole;

heating the mandrel and the wire.

2. The method of claim 1, wherein wrapping a metal wire includes wrapping a wire formed of shape memory metal.

3. The method of claim 2, wherein wrapping a wire formed of shape memory metal includes wrapping a wire formed of a Nickel Titanium alloy.

4. The method of claim 1 wherein forming a first hole along the elongate axis comprises forming a first hole that is discontinuous in extent between proximal end and distal end.

5. The method of claim 1 wherein forming a second hole includes forming a second hole that forms an angle of between 70 degrees and 90 degrees with the elongate axis.

6. The method of claim 1 wherein forming a third hole includes forming a third hole that forms an angle of between 70 degrees and 90 degrees with the elongate axis.

7. The method of claim 1, wherein providing a mandrel includes providing a mandrel formed from metal.

8. The method of claim 1, wherein providing a mandrel includes providing a mandrel formed from a ceramic material.

9. The method of claim 1, wherein the first radial plane and the second radial plane are not offset from each other, whereby the wire is wrapped a full circumferential loop around the mandrel.

10. The method of claim 1, wherein the first radial plane and the second radial plane are offset from each other, whereby the wire is wrapped between 1.0 and 1.5 circumferential loops around the mandrel.

11. The method of claim 1, wherein forming a first hole includes forming a first hole by molding a ceramic material while the ceramic material is malleable.

12. The method of claim 1, wherein forming a first hole includes forming a hole by drilling.

13. The method of claim 1, wherein heating the mandrel and wire includes heating to a temperature of between 510°

F. and 540°

F.

14. The method of claim 10, wherein heating the mandrel and the wire includes heating for a period of between 4.5 minutes and 5.5 minutes.

15. The method of claim 1, further including quenching the mandrel and wire in water, and thereafter removing the wire from the mandrel.

16. A shaping structure having a generally helical profile and configured to support electrodes for delivering electric energy into a cylindrical lumen of a patient, the shaping structure comprising:

a wire formed of metal, and having a geometric shape described according to a three dimensional orthogonal coordinate system having an x-axis, a y-axis, and a z-axis, the wire being formed to include;

a first element extending along the x-axis such that y=0, z=0 at all points on the first element;

a second element extending along the x-axis such that y=0, z=0 at all points on the second element; and

a third element, positioned between and operably connected with the first element and the second element, wherein the third element follows a spiral path with an axial length, a pitch, p, and a helical radius, r, about the x axis such that for any point on the third element, y=r*cos t, z=r*sin t, x=p*(t/2π

), where t is a parameter having a dimension in radians;

wherein the third element is connected to the first element by a first connector that is straight and extends between a proximal end of the first element and a distal end of the third element, wherein the first connector forms an angle of between 70 degrees and 90 degrees with the x-axis.

17. The shaping structure of claim 16, wherein the third element is connected to the second element by a second connector that is straight and extends between a distal end of the second element and a proximal end of the third element, wherein the second connector forms an angle of between 70 degrees and 90 degrees with the x-axis.

18. The shaping structure of claim 16, wherein the first element and the second element are each between 10 and 20 mm in length.

19. The shaping structure of claim 16, wherein the pitch is between 10 mm and 15 mm.

20. The shaping structure of claim 16, wherein the radius is between 6 mm and 12 mm.

21. The shaping structure of claim 16, wherein the wire is formed of shape memory metal, and has a diameter of between 1.0 mm and 2.0 mm.

22. The shaping structure of claim 16, where the length is between 10 mm and 20 mm.