Electrolyte purging electrode tip

• US 4,943,290 A
• Filed: 04/27/1989
• Issued: 07/24/1990
• Est. Priority Date: 06/23/1987
• Status: Expired due to Term

• Current Assignee: Linvatec Corporation (Jefferies Financial Group, Inc.)
• Original Assignee: Concept, Inc. (Bristol-Myers Squibb Company)
• Inventors: Bays, F. Barry, Rexroth, Frederick W.
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US07/343,730
• Time in Patent Office: 453 Days
• Field of Search: 128/303.13-303.18, 128/303.1, 606/45, 606/46, 606/48-50
• US Class Current: 606/45
• CPC Class Codes: A61B 18/1485 having a short rigid shaft for accessing the inner body through natural openings
• CPC Class Codes: A61B 2018/1472 for use with liquid electrolyte, e.g. virtual electrodes

Abstract

An electrolyte fluid purging electrosurgical device for use with an electrode holder connected to an electrical power source and to a source of a non-electrically conductive fluid and a method of use are disclosed. The fluid purging electrosurgical device enables electrosurgery at a surgical site where an area proximate the surgical site is surrounded by an electrically conductive fluid such as saline irrigation fluids, body fluids, certain injectables and the like. The fluid purging electrosurgical device comprises an electrode shaft with an electrode shaft connector electrically connecting a first end of the electrode shaft to an electrode holder. An insulating material provides electrical insulation between a second end of the electrode shaft and the electrode holder. The insulating material is positioned on the electrode shaft to expose a portion of the second end of the electrode shaft to define an electrode tip to provide electrical current to the surgical site. A duct means is connected to the source of the non-electrically conductive fluid and extends along the electrode shaft to deliver the non-electrically conductive fluid to a region immediately proximate the electrode tip to displace the electrically conductive fluid at the position of the electrode tip in the surgical site to enable electrosurgical treatment thereat.

Claims

1. An electrolyte fluid purging electrosurgical device for use with an electrode holder connected to an electrical power source and with a source of non-electrically conductive fluid for enabling electrosurgery at a surgical site which is surrounded by an electrically conductive fluid, comprising:

an electrically conductive electrode shaft having a first electrode end and a second electrode end;

an insulating tubular duct defining a duct conduit extending between a first duct end and a second duct end;

said electrode shaft being disposed within said duct conduit with said first electrode end of said electrode shaft extending beyond said first duct end of said insulating tubular duct for defining an electrode shaft connecting means for connection to the electrode holder;

said second electrode end of said electrode shaft extending beyond said second duct end of said insulating tubular duct for defining an electrode tip to provide electrical current to the surgical site;

a plurality of support walls extending longitudinally within said duct conduit of said insulating tubular duct and disposed between said insulating tubular duct and said electrode shaft for supporting said electrode shaft within said duct conduit of said insulating tubular duct and for defining a plurality of conduit channels encompassing said electrode shaft; and

means for connecting said first duct end of said insulating tubular duct to the source of non-electrically conductive fluid for enabling non-electrically conductive fluid to flow through said plurality of conduit channels of said insulating tubular duct to deliver the electrically non-conductive fluid to an immediate area proximate said electrode tip to displace the electrically conductive fluid from the immediate area proximate the surgical site when said electrode tip is positioned at the surgical site to enable electrosurgical treatment thereat.

2. The electrolyte fluid purging electrosurgical device of claim 1, wherein said electrode shaft connecting means includes means for removably connecting said electrode shaft to the electrode holder.

3. The electrolyte fluid purging electrosurgical device of claim 1, wherein said electrode shaft is coaxially aligned within said duct conduit of said insulating tubular duct;

and

said plurality of conduit channels uniformly surrounding said electrode shaft.

4. The electrolyte fluid purging electrosurgical device of claim 1, wherein said plurality of support walls are integrally formed with said insulating tubular duct.

5. The electrolyte fluid purging electrosurgical device of claim 1, wherein said means for connecting said first duct end includes an input fluid port disposed proximate said first duct end for removably connecting said insulating tubular duct to the source of the electrically non-conductive fluid.

6. The electrolyte fluid purging electrosurgical electrode of claim 5, wherein said input fluid port further includes a taper joint which includes an external taper for frictionally engaging an inner diameter of a fluid delivery line in fluid communication with the source of the non-conductive fluid to form a removable fluid tight seal between said fluid delivery line and said input fluid port.

7. The electrolyte fluid purging electrosurgical device of claim 1, including an insulating coupler disposed proximate said first duct end of said insulating tubular duct;

and

said insulating coupler including an internal taper for cooperating with an external taper of the electrode holder to provide electrical insulation and a waterproof seal when said electrode shaft connecting means is connected to the electrode holder.