METHOD FOR MAKING A LOW OHMIC PRESSURE-CONTACT ELECTRICAL CONNECTION BETWEEN SPLIT RING ELECTRODE AND LEAD WIRE

• US 20140261985A1
• Filed: 03/13/2013
• Published: 09/18/2014
• Est. Priority Date: 03/13/2013
• Status: Active Grant

• Current Assignee: Biosense Webster Israel Ltd. (Johnson & Johnson)
• Original Assignee: Biosense Webster Israel Ltd. (Johnson & Johnson)
• Inventors: Selkee, Thomas V.
• Granted Patent: US 9,278,187 B2
• Time in Patent Office: Days
• US Class Current: 156/187
• 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 2018/00077 high, i.e. electrically conducting
• CPC Class Codes: A61B 2018/00125 with nanostructure
• CPC Class Codes: A61B 2018/00136 with polymer
• CPC Class Codes: A61B 2018/00148 with metal
• CPC Class Codes: A61B 2562/0215 Silver or silver chloride containing
• CPC Class Codes: A61B 2562/125 characterised by the manufacture of electrodes
• CPC Class Codes: A61B 5/283 Invasive
• CPC Class Codes: A61B 5/6852 Catheters
• CPC Class Codes: A61M 25/0009 Making of catheters or other medical or surgical tubes
• CPC Class Codes: B29C 65/02 by heating, with or without pressure
• CPC Class Codes: B29C 65/48 using adhesives , i.e. using supplementary joining material; solvent bonding
• CPC Class Codes: B29C 65/4815 Hot melt adhesives, e.g. thermoplastic adhesives
• CPC Class Codes: B29C 65/4855 characterised by their physical properties, e.g. being electrically-conductive
• CPC Class Codes: B29C 65/489 being metals
• CPC Class Codes: B29C 65/525 by extrusion coating
• CPC Class Codes: B29C 65/568 using a swaging operation, i.e. totally deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
• CPC Class Codes: B29C 65/72 by combined operations or combined techniques, e.g. welding and stitching
• CPC Class Codes: B29C 66/21 said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
• CPC Class Codes: B29C 66/5221 : for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
• CPC Class Codes: B29C 66/74285 : Noble metals, e.g. silver, gold, platinum or their alloys

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.

Claims

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;

mounting a split ring electrode on the outer surface of the tubing covering the opening and the distal portion of electrode lead wire; and

providing an electrically-conductive adhesive between the ring electrode and the outer surface of the tubing.

2. The method of claim 1, wherein providing an electrically-conductive adhesive includes applying a film of the electrically-conductive adhesive on an inner surface of the split ring electrode before mounting on the outer surface of the tubing.

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

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

5. The method of claim 3, wherein the platinum alloy comprises about 90% platinum.

6. The method of claim 1, wherein the at least one lead wire comprises, stainless steel, copper and/or nickel alloy.

7. The method of claim 1, wherein the at least one lead wire comprises a coating of silver.

8. The method of claim 3, wherein the coating of silver has a thickness ranging between about 20-30 microns.

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

10. The method of claim 1, wherein providing an electrically-conductive adhesive includes applying the electrically-conductive adhesive on at least portions of the distal portion of the electrode and of the outer surface before mounting the split ring electrode.

11. The method of claim 10, wherein the electrically-conductive adhesive is applied as a generally continuous line circumferentially around the tubing.

12. The method of claim 10, wherein the electrically-conductive adhesive is applied as individual beads circumferentially around the tubing.

13. 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.

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

15. The method of claim 1, wherein further comprising heating the electrically-conductive adhesive to reflow.

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

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

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

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

20. The method of claim 1, wherein mounting a 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.