Insulated electrode and method of assembly

• US 6,461,355 B2
• Filed: 05/27/1999
• Issued: 10/08/2002
• Est. Priority Date: 05/27/1999
• Status: Expired due to Term

• Current Assignee: Ams Research Corporation (Endo International PLC)
• Original Assignee: Ams Research Corporation (Endo International PLC)
• Inventors: Ferry, Steven J., Svejkovsky, Ronald D., Klatt, William M., Westrum, John W. Jr., Morningstar, Randy L.
• Primary Examiner(s): ROLLINS, ROSILAND STACIE
• Application Number:
  US09/323,168
• Publication Number:
  US 20020049440A1
• Time in Patent Office: 1,230 Days
• Field of Search: 128/898, 606/41, 606/45-59, 298/82, 296/11, 296/13, 298/25, 298/55, 298/56
• US Class Current: 606/41
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/149 bow shaped or with rotatable body at cantilever end, e.g. for resectoscopes, or coagulating rollers

Abstract

A design and method of manufacture is disclosed for an insulated electrode used during surgical procedures. The electrode includes a durable electrical insulation element that can withstand the range of temperatures generated during an electrosurgical procedure. Such insulation characteristics include resistance to meltback and manufacturability to ensure the device is biocompatible and non-toxic so as to prevent adverse reactions in both patients and users of the device. The insulated electrode further includes properties that reduce the incidence of scope damage caused by the intensity of heat generated during the cutting and coagulation cycles.

Claims

1. A method of insulating a wire element of a surgical electrode device comprising the steps of:

providing an uninflated silicone tube of a material suitable for incorporation in a surgical electrode device;

sliding one end of the uninflated silicone tube over an assembly tool tip;

securing said uninflated silicone tube to said assembly tool tip;

positioning an end of the wire element in a second open end of said uninflated silicone tube;

inflating said silicone tube with a flow of fluid through said assembly tool tip;

directing said wire element into said silicone tube; and

discontinuing said flow of fluid so that said silicone tube sheaths said wire element.

2. The method of claim 1 wherein a fluid flows through said assembly tool to inflate said silicone tube.

3. The method of claim 1 wherein a clip is used to secure said silicone tube to said assembly tool tip.

4. The method of claim 1 wherein inflating said silicone tube includes expanding said silicone tube in a radially outwardly direction, and wherein the wire element is provided with an external diameter greater than an internal diameter of said silicone tube.

5. The method of claim 1 wherein said internal diameter of said silicon tube is nearly equal to the external diameter of said wire element.

6. The method of claim 5 wherein said coefficient of friction of said silicone tube against said wire element is approximately 0.8.

7. The method of claim 1 wherein directing said wire element includes locating said second end of said silicone tube adjacent to a loop proximally located on said wire element.

8. The method of claim 1 further comprising deflating said silicone tube.

9. The method of claim 8 wherein an internal surface of said silicone tube uniformly contacts and external surface of said wire element.

10. The method of claim 1 wherein introducing a flow of fluid includes expanding said elastomeric tube in a radially outward direction, and wherein the wire element is provided with an external diameter greater than an internal diameter of said elastomeric tube.

11. A method of insulating a wire element of a surgical cutting and coagulation electrode device, the method comprising the steps of:

providing an elongated elastomeric uninflated tube constructed of a material that is suitable for incorporation in the surgical device;

introducing a flow of fluid through said uninflated tube;

moving said wire element into said tube during said flow of fluid; and

,

discontinuing said flow of fluid so that said tube sheaths said wire element.

12. The method of claim 11 wherein said elastomeric tube is made of silicone.

13. The method of claim 11 wherein said fluid is air.

14. The method of claim 11 further comprising attaching one end of said elastomeric tube to a needle of a pressurized fluid source.

15. The method of claim 14 further comprising attaching a clip to secure said elastomeric tube to said needle of said pressurized fluid source.

16. The method of claim 15 further comprising adjusting a regulator of said pressurized fluid source to 100 psi.

17. The method of claim 14 further comprising positioning one end of said wire element adjacent to another open end of said elastomeric tube.

18. The method of claim 17 wherein after moving said wire element the act of inserting said wire element into said elastomeric tube until a second end of said elastomeric tube abuts a loop proximally located on said wire element.

19. The method of claim 11 further comprising sheathing said wire element in said elastomeric tube.

20. The method of claim 19 wherein an internal surface of said elastomeric tube uniformly contacts an external surface of said wire element.