Electrosurgery electrode

• US 4,593,691 A
• Filed: 07/13/1983
• Issued: 06/10/1986
• Est. Priority Date: 07/13/1983
• Status: Expired due to Term

• Current Assignee: Linvatec Corporation (Jefferies Financial Group, Inc.)
• Original Assignee: Concept, Inc. (Bristol-Myers Squibb Company)
• Inventors: Ector, W. Lane Jr., Trott, Arthur F., Lindstrom, Judy
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US06/513,440
• Time in Patent Office: 1,063 Days
• Field of Search: 128/303.13-303.19, 128/800, 128/801, 128/741, 219/229, 219/230, 219/233-235, 219/238, 219/239, 433/32
• US Class Current: 606/45
• CPC Class Codes: A61B 18/1402 Probes for open surgery

Abstract

An improved electrosurgery electrode is disclosed for cooperation with an electrode holder connected to a source of electrical power. The improved electrode comprises a solid electrode shaft having a first and a second end with a shaft connector electrically connecting the first end of the electrode shaft to the electrode holder. An electrode tip is disposed on the second end of the shaft with the electrode tip having a hook terminating in a distal end extending generally perpendicular to an axis extending through the electrode shaft. A shaft insulator provides a waterproof electrical insulation between an exposed portion of the electrode tip and the shaft connector. The shaft connector may optionally enable removal or interchange of the electrodes in the electrode holder to accommodate for various types of electrosurgery techniques such as a subcutaneous lateral release or a meniscectomy procedure through an arthroscopic system.

Claims

1. An improved electrosurgery electrode for cooperation with an electrode holder connected to a source of electrical power and with an introducer catheter, comprising in combination:

a solid electrode shaft having a first and a second end;

a shaft connecting means for electrically connecting said first end of said electrode shaft to the electrode holder;

an electrode tip having a proximal and distal end;

said distal end of said electrode tip comprising a hook extending generally perpendicular from an axis extending through said electrode shaft;

a tip connecting means for electrically connecting said proximal end of said electrode tip to said second end of said electrode shaft thereby electrically connecting said distal end of said electrode tip;

said distal end of said electrode tip extending beyond the surface of said electrode shaft a distance generally equal to or less than the radius of said electrode shaft thereby enabling said electrode tip to pass through the introducer catheter; and

insulating means for providing electrical insulation and abrasion resistance between an exposed portion of said electrode tip and said shaft connecting means and for forming a substantially waterproof seal when said first end of said electrode shaft is connected to the electrode holder.

7. An improved electrosurgery electrode as set forth in claim 1 wherein said tip connecting means includes said second end of said electrode shaft having a bore axially extending into said shaft;

said electrode tip extending into said bore; and

means for securing said electrode tip in said bore.

8. An improved electrosurgery electrode as set forth in claim 7 wherein said means for securing said electrode tip in said bore includes radially inwardly crimping said second end of said electrode shaft into engagement with said electrode tip.

9. An improved electrosurgery electrode as set forth in claim 1 wherein the cross-sectional area of said electrode tip is tapered toward said distal end of said electrode tip.

10. An improved electrosurgery electrode for as set forth in claim 1 including tip insulating means for insulating said electrode tip to expose only the distal end of said electrode tip from approximately 0.04 inches to 0.05 inches.

11. An improved electrosurgery electrode as set forth in claim 1 wherein said electrode tip comprises a hooked blade.

14. An improved electrosurgery electrode as set forth in claim 1 wherein said electrode tip comprises a hooked blade wherein said distal end has a spherical radius of approximately 0.007 inches.

2. An improved electrosurgery electrode as set forth in claim 20 wherein said shaft connecting means includes means for removably connecting said electrode shaft to the electrode holder.

3. An improved electrosurgery electrode as set forth in claim 20 wherein said insulating means includes an insulating hub disposed proximate said first end of said electrode shaft for insulating said shaft connecting means.

4. An improved electrosurgery electrode as set forth in claim 3 wherein said insulating hub includes an internal taper for cooperating with an external taper on the electrode holder to provide said electrical insulation between said shaft and the electrode holder.

5. An improved electrosurgery electrode as set forth in claim 3 wherein said insulating hub includes an aperture defined in said insulating hub;

said aperture receiving said first end of said electrode shaft therein.

6. An improved electrosurgery electrode as set forth in claim 5 wherein;

said insulating means includes shaft tubing means extending between said distal end of said electrode tip and said insulating hub;

said shaft tubing means includes a first shaft tubing engaging said shaft;

a second shaft tubing overlaying said first shaft tubing to provide additional abrasion resistance and;

said insulating hub having an undercut portion on the outer periphery thereof with said shaft tubing means overlaying said undercut portion of said insulating hub.

12. An improved electrosurgery electrode for cooperation with an electrode holder connected to a source of electrical power and with an introducer catheter, comprising in combination:

a solid electrode shaft having a first and a second end;

a shaft connecting means for electrically connecting said first end of said electrode shaft to the electrode holder;

an insulating hub disposed proximate said first end of said electrode shaft for insulating said shaft connecting means and for forming a substantially waterproof seal when said first end of said electrode shaft is connected to the electrode holder;

said insulating hub including an aperture defined in said insulating hub with said aperture receiving said first end of said electrode shaft therein;

an electrode tip having a proximal and distal end;

said distal end of said electrode tip comprising a hook extending generally perpendicular from an axis extending through said electrode shaft;

said second end of said electrode shaft including a bore axially extending into said shaft with said proximal end of said electrode tip extending from said bore, electrically connecting said distal end of said electrode tip to said second end of said electrode shaft;

said distal end of said electrode tip extending beyond the surface of said electrode shaft a distance generally equal to or less than the radius of said electrode shaft thereby enabling said electrode tip to pass through the introducer catheter; and

an insulating shaft tubing means for providing an electrical insulation between an exposed portion of said electrode tip and said insulating hub.

13. An improved electrosurgery electrode as set forth in claim 12 including tip insulating means for insulating said electrode tip to expose only the distal end of said electrode tip from approximately 0.04 inches to 0.05 inches.