Electrosurgical instrument

• US 20090076505A1
• Filed: 09/13/2007
• Published: 03/19/2009
• Est. Priority Date: 09/13/2007
• Status: Abandoned Application

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Arts, Gene H.
• Application Number:
  US11/900,715
• Publication Number:
  US 20090076505A1
• Time in Patent Office: Days
• US Class Current: 606/49
• CPC Class Codes: A61B 18/042 using additional gas becoming plasma
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 2018/00589 Coagulation
• CPC Class Codes: A61B 2218/005 using gas or vapor, e.g. for protection or purging

Abstract

An electrosurgical instrument provides pressurized gas to a surgical site and includes a hand-held applicator having a housing with proximal and distal ends and a tube defined therethrough. The tube is adapted to connect to a source of pressurized gas and is configured to selectively deliver a volume of pressurized gas to a surgical site. An actuator is also included which is configured to selectively regulate the volume of pressurized ionizable gas flowing through the tube. The actuator selectively regulates the flow of the gas through the tube. The actuator is positionable from a first position which allows a first predetermined volume of pressurized ionizable gas to flow through the tube for dissection purposes to at least one subsequent position which allows a different volume of pressurized ionizable gas to flow through the tube for coagulation purposes. The actuator, when disposed in the at least one subsequent position, operatively communicates with an active electrode to ionize the different volume of pressurized ionizable gas prior to the different volume of pressurized ionizable gas exiting the tube.

Claims

1. An electrosurgical instrument comprising:

a housing including a tube extending therethrough, the tube having proximal and distal ends, the proximal end being adapted to connect to at least a first source of gas and the distal end being configured to deliver gas to a surgical site; and

an actuator configured to selectively regulate the flow of gas through the tube, the actuator having at least a first position which allows a first predetermined rate of gas to flow through the tube for a first surgical purpose, and at least one subsequent position which allows at least one different rate of gas to flow through the tube for at least a second surgical purpose.

2. The electrosurgical instrument of claim 1, further including an electrode assembly configured to selectively ionize the gas for at least one of the first or second surgical purposes.

3. The electrosurgical instrument of claim 1, wherein the first surgical purpose includes at least one of dissection and coagulation.

4. The electrosurgical instrument of claim 3, wherein the second surgical purpose includes at least one of the other of dissection and coagulation.

5. The electrosurgical instrument of claim 1, wherein the actuator is configured to prevent the flow of gas through the tube.

6. The electrosurgical instrument of claim 1, wherein the first source of gas is a portable cartridge.

7. The electrosurgical instrument according to claim 1 wherein the first source of gas includes a cylinder containing pressurized ionizable gas.

8. The electrosurgical instrument according to claim 1, further comprising at least one pressure relief mechanism operatively coupled to the tube.

9. The electrosurgical instrument according to claim 8, wherein the pressure relief mechanism is located in close proximity to the patient.

10. The electrosurgical instrument according to claim 1, further comprising a first pressure relief mechanism operatively coupled to the tube for regulating gas pressure within the tube and a second pressure relief mechanism operative coupled to the hand-held device for regulating gas within the surgical site.

11. The electrosurgical instrument according to claim 1 further comprising at least one pressure relief mechanism operatively coupled to the tube which regulates the pressure flowing through the tube to below 50 mmHg.

12. The electrosurgical instrument according to claim 1 further comprising a first pressure relief mechanism operatively coupled to a first part of the tube and a second pressure relief mechanism operatively coupled to a second part of the tube proximal to the first pressure relief mechanism.

13. An electrosurgical system for dissecting and coagulating tissue, comprising:

an electrosurgical generator;

at least a first source of gas; and

a hand-held applicator comprising;

a housing including a tube extending therethrough, the tube having proximal and distal ends, the proximal end being adapted to connect to the at least a first source of gas and the distal end being configured to deliver gas to a surgical site;

an actuator configured to selectively regulate the flow of gas through the distal end of the tube, the actuator having at least a first position which allows a first predetermined rate of gas to flow for a first surgical purpose, and at least one subsequent position which allows a different rate of gas to flow through the tube for a second surgical purpose; and

an electrode mounted in proximity to the distal end of the tube, the electrode operably connected to the electrosurgical generator and configured to selectively ionize the gas passing thereby.

14. An electrosurgical instrument, comprising:

a housing including a tube extending therethrough, the tube having proximal and distal ends, the proximal end being adapted to connect to the at least first source of gas and the distal end being configured to deliver gas to a surgical site;

an actuator configured to selectively regulate the flow of gas through the distal end of the tube, the actuator having at least a first position which allows a first predetermined rate of gas to flow for a first surgical purpose, and at least one subsequent position which allows a different rate of gas to flow through the tube for a second surgical purpose;

an electrode mounted in proximity to the distal end of the tube, the electrode operably connected to the electrosurgical generator and configured to selectively ionize the gas passing thereby; and

at least one pressure relief mechanism operably associated with the tube.