Method for making a low ohmic pressure-contact electrical connection between split ring electrode and lead wire

Patent metadata

Field	Value
Publication number	US-10004417-B2
Application number	US-201615063422-A
Country	US
Kind code	B2
Filing date	Mar 7, 2016
Priority date	Mar 13, 2013
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A method for attaching a split ring electrode to a catheter tip section includes providing a tubing with a lumen and an opening in the tubing side wall, passing an electrode lead wire through the opening, and wrapping the lead wire around the tubing. A split ring electrode is mounted on the tubing over the wrapped lead wire and opening, with electrically-conductive thermoplastic elastomeric adhesive applied between the ring electrode and the outer surface of the tubing, and reheated to reflow.

First claim

What is claimed is:

1. A method for attaching a split ring electrode to a tubing of a catheter, comprising:
providing a tubing with at least one lumen, a side wall and at least one opening in the side wall providing communication between the at least one lumen and outside the tubing;
passing an electrode lead wire through the at least one lumen and out of the at least one opening to expose a distal portion of the electrode lead wire;
positioning the distal portion of the electrode lead wire on an outer surface of the tubing;
dispensing an electrically conductive adhesive on the outer surface of the tubing from a dispenser housing the electrically conductive adhesive by rotating the tubing underneath the dispenser while the dispenser dispenses the electrically conductive adhesive; and
mounting a split ring electrode on the outer surface of the tubing covering the opening, the distal portion of the electrode lead wire and the electrically conductive adhesive; and
heating the electrically-conductive adhesive to reflow.

2. The method of claim 1 , wherein the split ring electrode comprises a platinum alloy.

3. The method of claim 2 , wherein the platinum alloy comprises platinum and at least one selected from the group consisting of iridium, palladium and copper.

4. The method of claim 2 , wherein the platinum alloy comprises about 90% platinum.

5. The method of claim 1 , wherein the electrode lead wire comprises, stainless steel, copper and/or nickel alloy.

6. The method of claim 1 , wherein the electrode lead wire comprises a coating of silver.

7. The method of claim 6 , wherein the coating of silver has a thickness ranging between about 20-30 microns.

8. The method of claim 1 , wherein the electrode lead wire has a diameter ranging between about 0.002 inch and 0.005 inch.

9. The method of claim 1 , wherein the dispensing the electrically-conductive adhesive includes dispensing the electrically-conductive adhesive from the dispenser in intervals so that the electrically-conductive adhesive is provided on spaced apart portions of the distal portion of the electrode lead wire and the outer surface of the tubing.

10. The method of claim 1 , wherein the dispensing the electrically-conductive adhesive comprises dispensing a generally continuous line of the electrically-conductive adhesive from the dispenser circumferentially around the tubing.

11. The method of claim 1 , wherein the dispensing the electrically-conductive adhesive comprises dispensing individual beads of the electrically-conductive adhesive circumferentially around the tubing.

12. The method of claim 1 , wherein positioning the distal portion of the electrode lead wire on an outer surface of the tubing includes wrapping the distal portion around the outer surface of the tubing.

13. The method of claim 1 , wherein the electrically-conductive adhesive comprises an electrically-conductive phase change thermal bonding adhesive.

14. The method of claim 1 , wherein the heating the electrically-conductive adhesive to reflow comprises either:
heating the dispenser during the dispensing, or
heating the electrically-conductive adhesive after the dispensing and after the mounting the split ring electrode.

15. The method of claim 1 , wherein the split ring electrode has a width ranging between about 1.0 and 3.0 mm.

16. The method of claim 1 , wherein the split ring electrode has a coating of gold or palladium.

17. The method of claim 16 , wherein the coating on the split ring electrode has a thickness ranging between about 10 and 40 microns.

18. The method of claim 1 , wherein the mounting the split ring electrode on the outer surface of the tubing comprises radially compressing the split ring electrode onto the outer surface of the tubing.

19. The method of claim 1 , wherein the mounting the split ring electrode on the outer surface of the tubing comprises radially compressing the split ring electrode onto the outer surface of the tubing and heating the electrically-conductive adhesive.

20. A method for attaching a split ring electrode to a tubing of a catheter, comprising:
providing a tubing with at least one lumen, a side wall and at least one opening in the side wall providing communication between the at least one lumen and outside the tubing;
passing an electrode lead wire through the at least one lumen and out of the at least one opening to expose a distal portion of the electrode lead wire;
positioning the distal portion of the electrode lead wire on an outer surface of the tubing;
mounting a split ring electrode on the outer surface of the tubing covering the at least one opening and the distal portion of the electrode lead wire;
providing an electrically-conductive adhesive between the split ring electrode and the outer surface of the tubing; and
heating the electrically-conductive adhesive to reflow.

Assignees

• Biosense Webster Israel Ltd

Inventors

• Selkee Thomas V

Classifications

• A61B2562/125

  characterised by the manufacture of electrodes · CPC title

• A61B2562/0215

  Silver or silver chloride containing · CPC title

• A61B2018/00136

  with polymer · CPC title

• A61B2018/00077

  high, i.e. electrically conducting · CPC title

• A61B2018/00148

  with metal · CPC title