← Back to Patent Explorer
US4943290A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrolyte purging electrode tip

Assignee: Linvatec Corp
•
Filing: 1989-04-27
•
Granted: 1990-07-24
•
Expires: 2009-04-27
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

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.

Inventors

  • 👤 Frederick W. Rexroth
  • 👤 F. Barry Bays

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 10:11
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1485; A61B2018/1472

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 284 words
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.
Claim 2
Dependent Claim 284 words
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.
Claim 3
Dependent Claim 27 words
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.
Claim 4
Dependent Claim 36 words
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.
Claim 5
Dependent Claim 23 words
The electrolyte fluid purging electrosurgical device of claim 1, wherein said plurality of support walls are integrally formed with said insulating tubular duct.
Claim 6
Dependent Claim 44 words
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.
Claim 7
Dependent Claim 62 words
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.
Claim 8
Dependent Claim 62 words
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.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-07-23 1994-01-22 1994-07-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-07-23 1998-01-22 1998-07-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-07-23 2002-01-22 2002-07-24 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag