Self contained, gas-enhanced surgical instrument

• US 20050171528A1
• Filed: 02/01/2005
• Published: 08/04/2005
• Est. Priority Date: 02/03/2004
• Status: Active Grant

• Current Assignee: Covidien AG (Medtronic Plc)
• Original Assignee: Covidien AG (Medtronic Plc)
• Inventors: Podhajsky, Ronald J., Arts, Gene H., Sartor, Joe D., Reschke, Arlan J., Hogan, Michael
• Granted Patent: US 7,628,787 B2
• Time in Patent Office: Days
• US Class Current: 606/41
• CPC Class Codes: A61B 18/042 using additional gas becoming plasma

Abstract

An electrosurgical apparatus for coagulating tissue includes an elongated housing and an electrode located adjacent the distal end of the housing. The electrode can be connected to a source of electrosurgical energy. At least one actuator is included which electrosurgically energizes the electrode. The apparatus also includes a relatively small gas cylinder which contains a pressurized gas consisting of inert gas and which is selectively seated in the housing. Upon actuation of the actuator, gas is dispersed under pressure from the gas cylinder to the electrode and is ionized prior to the distribution of the gas into the operating field.

Claims

1. An electrosurgical instrument for providing ionized inert gas to a surgical site, comprising:

a frame having a proximal end and a distal end, the distal end having a port for emitting ionized gas;

a receptacle for seating a cylinder of pressurized inert gas therein, the frame housing a tube which channels the pressurized inert gas to the proximity of the electrode;

an active electrode located adjacent the distal end of the frame, the electrode adapted to connect to a source of electrosurgical energy; and

at least one actuator which actuates the flow of pressurized inert gas from the cylinder to the proximity of the active electrode and which actuates the delivery of electrosurgical energy from the source of electrosurgical energy to the active electrode for ionizing the pressurized inert gas for use at the surgical site.

2. The electrosurgical instrument according to claim 1, wherein the at least one actuator is adapted to actuate the release of pressurized inert gas from the cylinder prior to actuating the delivery of the electrosurgical energy from the source.

3. The electrosurgical instrument according to claim 1, wherein a first actuator is included which actuates the flow of pressurized inert gas from the cylinder and a second actuator which actuates delivery of the electrosurgical energy from the source of electrosurgical energy to the active electrode.

4. The electrosurgical instrument according to claim 3, wherein the first actuator is actuated prior to actuating the second actuator.

5. The electrosurgical instrument according to claim 1, wherein the at least one actuator which actuates the flow of pressurized inert gas includes a valve.

6. The electrosurgical instrument according to claim 3, wherein the first actuator which actuates the flow of pressurized inert gas includes a valve.

7. The electrosurgical instrument according to claim 6, wherein the cylinder includes a sealed outlet and the valve includes a coupling which is configured to rupture the sealed outlet upon insertion of the cylinder into the receptacle.

8. The electrosurgical instrument according to claim 6, wherein the valve includes a plenum positioned between the coupling and the channel which regulates flow of pressurized inert gas to the channel.

9. The electrosurgical instrument according to claim 6, wherein the valve is also a flow regulator which regulates the flow of pressurized inert gas to the active electrode.

10. The electrosurgical instrument according to claim 6, wherein the valve also includes a pressure regulator which regulates the pressure of the pressurized inert gas.

11. The electrosurgical instrument according to claim 1, further comprising:

a pressure regulator which regulates the pressure of the pressurized inert gas flowing to the active electrode.

12. The electrosurgical instrument according to claim 1, further comprising:

a first flow regulator which selectively regulates the flow of pressurized inert gas from the cylinder upon actuation.

13. The electrosurgical instrument according to claim 12, further comprising:

a second flow regulator which selectively regulates the flow of pressurized inert gas to the active electrode.

14. The electrosurgical instrument according to claim 1, wherein the at least one actuator which actuates the flow of pressurized inert gas from the cylinder to the active electrode and which actuates the delivery of electrosurgical energy from the electrosurgical energy source to the active electrode is selectively adjustable to control the flow of pressurized inert gas and the delivery of electrosurgical energy.

15. The electrosurgical instrument according to claim 4, wherein the first actuator which actuates the flow of pressurized gas from the cylinder is adapted to selectively adjust the flow of pressurized gas from the cylinder.

16. The electrosurgical instrument according to claim 4, wherein the second actuator which actuates the delivery of electrosurgical energy from the electrosurgical energy source is adapted to selectively adjust the amount of electrosurgical energy that is delivered to the active electrode.

17. The electrosurgical instrument according to claim 11, wherein the pressure regulator includes a pressure relief valve in communication with the cylinder which relieves the pressure of the pressurized inert gas in the cylinder.

18. The electrosurgical instrument according to claim 1, further comprising:

a pressure relief valve for relieving the pressure of the pressurized inert gas.

19. The electrosurgical instrument according to claim 1, further comprising:

a flow limiter which limits the flow of pressurized inert gas to the active electrode.

20. The electrosurgical instrument according to claim 1, further comprising:

a flow regulator; and

a sensor in electrical communication with the flow regulator, the sensor being configured to sense a selected condition and automatically control the regulation of flow of pressurized inert gas to the active electrode.

21. The electrosurgical instrument according to claim 8, further comprising:

a sensor in electrical communication with the pressure relief valve which senses a selected condition and automatically activates the pressure relief valve to relieve the pressure of the pressurized inert gas in the cylinder.

22. The electrosurgical instrument according to claim 3, further comprising:

a sensor in electrical communication with the second actuator which actuates delivery of electrosurgical energy from the source, the sensor being configured to sense a selected condition and automatically modulate the delivery of energy to the active electrode.

23. The electrosurgical instrument according to claim 1, wherein the instrument is configured to produce inert gas-enhanced electrosurgical fulguration.

24. The electrosurgical instrument according to claim 1, wherein the instrument is configured to coagulate body tissue.

25. The electrosurgical instrument according to claim 1, wherein the instrument is configured and adapted for use in an endoscopic application.

26. The electrosurgical instrument according to claim 1, wherein the instrument is configured and adapted for use in a laparoscopic application.

27. The electrosurgical instrument according to claim 1, further comprising:

a sensor for sensing a condition, the sensor being electrically connected to a safety pressure relief valve which vents pressure from the cylinder before the cylinder is removed from the receptacle.

28. The electrosurgical instrument according to claim 1, wherein the inert gas consists of argon.

29. The electrosurgical instrument according to claim 1, wherein the inert gas consists of a mixture of inert gases.

30. The electrosurgical instrument according to claim 1, wherein the cylinder has a volume of at least about 100 cc.

31. The electrosurgical instrument according to claim 1, wherein the pressure of the pressurized inert gas in the cylinder is at least about 3000 psi.

32. The electrosurgical instrument according to claim 1, further comprising:

an indicator which indicates that a characteristic of the pressurized inert gas in the cylinder is different than a selected desired level.

33. The electrosurgical instrument according to claim 1, wherein the cylinder is visibly coded to indicate a characteristic of at least one of the cylinder and the pressurized inert gas.

34. The electrosurgical instrument according to claim 1, further comprising:

a member which supports the active electrode and which is selectively extendable from the distal end of the frame.