Method of manufacturing a shaping structure for denervation

Patent metadata

Field	Value
Publication number	US-10448994-B2
Application number	US-201614994868-A
Country	US
Kind code	B2
Filing date	Jan 13, 2016
Priority date	Jan 13, 2016
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

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.

First claim

We claim:

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 outer 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 outer 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 outer surface to connect with the first hole, the third hole lying in a second radial plane of the mandrel;
wrapping a single metal wire around the curved outer surface of the mandrel in a helical configuration in an area of the mandrel between the second hole and the third hole;
inserting a first end of the single metal wire into the second hole and a second end of the single metal wire into the third hole, and threading the first end and the second end of the single metal wire until an end emerges from the opposing ends of the bore of the first hole;
heating the mandrel and the single metal wire;
after heating, removing the single metal wire from the mandrel;
attaching the first end of the single metal wire to an elongate shaft that defines a passageway;
attaching the second end of the single metal wire to an elongate element that slidably passes through the passageway.

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

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

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

5. The method of claim 1 wherein forming the second hole includes forming the 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 the third hole includes forming the 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 the mandrel includes providing the mandrel formed from metal.

8. The method of claim 1 , wherein providing the mandrel includes providing the 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 single metal 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 single metal wire is wrapped between 1.0 and 1.5 circumferential loops around the mandrel.

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

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

13. The method of claim 1 , wherein heating the mandrel and the single metal 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 single metal 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 single metal wire in water, and thereafter removing the single metal wire from the mandrel.

Assignees

• Abbott Cardiovascular Systems Inc

Inventors

• Serna Benjamyn
• Magana Jesus
• Ngo Michael
• Stankus John

Classifications

• A61B2018/00434

  Neural system · CPC title

• A61B2017/00867

  shape memory effect · CPC title

• A61B2018/00404

  Blood vessels other than those in or around the heart · CPC title

• A61B2017/00526

  Methods of manufacturing · CPC title

• A61B2018/00214

  Expandable means emitting energy, e.g. by elements carried thereon · CPC title