Tissue coagulation method and device using inert gas

• US 7,648,503 B2
• Filed: 03/08/2006
• Issued: 01/19/2010
• Est. Priority Date: 03/08/2006
• Status: Active Grant

• Current Assignee: Covidien AG (Medtronic Plc)
• Original Assignee: Covidien AG (Medtronic Plc)
• Inventors: Podhajsky, Ronald J.
• Primary Examiner(s): Peffley; Michael
• Assistant Examiner(s): HUPCZEY, JR, RONALD JAMES
• Application Number:
  US11/370,287
• Publication Number:
  US 20070213709A1
• Time in Patent Office: 1,413 Days
• Field of Search: 606 32- 52
• US Class Current: 606/49
• CPC Class Codes: A61B 18/042 using additional gas becoming plasma
• CPC Class Codes: A61B 2018/00029 open
• CPC Class Codes: A61B 2018/1213 creating an arc
• CPC Class Codes: A61B 2018/122 ionizing, with corona

Abstract

A gas-enhanced electrosurgical method and apparatus for coagulating tissue. The apparatus includes a first tube with a proximal end and a distal end. The proximal end of the first tube is configured to receive pressurized ionizable gas. The distal end of the first tube is configured to deliver ionized gas towards a treatment area. The apparatus also includes at least one electrode positioned to selectively ionize the pressurized ionizable gas before the pressurized ionizable gas exits the distal end of the first tube. The electrode is adapted to operatively couple to an electrical energy source. The apparatus also includes a second tube with proximal and distal ends. The second tube is configured to selectively evacuate the ionized gas and dislodged tissue material from the treatment area.

Claims

1. An electrosurgical apparatus for coagulating tissue, comprising:

a first tube having a proximal end and a distal end, the proximal end being configured to receive pressurized ionizable gas and the distal end being configured to deliver ionized gas towards a treatment area;

at least one electrode positioned to selectively ionize the pressurized ionizable gas prior to the pressurized ionizable gas exiting the distal end of the first tube, the electrode adapted to be operatively coupled to an electrical energy source; and

a second tube having proximal and distal ends, the second tube being configured to selectively evacuate the ionized gas and dislodged tissue material from the treatment area, wherein the distal end of the first tube extends distally beyond the distal end of the second tube and wherein the distal end of the second tube extends distally beyond a distal end of the at least one electrode,

wherein the electrosurgical apparatus is configured for use in a bipolar mode wherein the first tube is activated with a first electrical potential and the second tube is activated with a second electrical potential.

2. The electrosurgical apparatus according to claim 1, wherein the first tube is concentrically disposed within the second tube.

3. The electrosurgical apparatus according to claim 1, further comprising a regulator which regulates the flow of pressurized argon through the first tube, the regulator being disposed between a gas supply of the pressurized argon and the proximal end of the first tube.

4. The electrosurgical apparatus according to claim 3, further comprising a fluid agitator, the fluid agitator being configured to impart non-laminar flow characteristics to the pressurized ionizable gas.

5. The electrosurgical apparatus according to claim 4, wherein the fluid agitator is disposed within the first tube.

6. The electrosurgical apparatus according to claim 5, wherein the pressurized ionizable gas is used to cool tissue.