Apparatus, system and method for performing an electrosurgical procedure

1. A method of performing an electrosurgical procedure, comprising:

percutaneously accessing tissue with a catheter, the catheter including an open proximal portion and a closed distal portion and defining a lumen therethrough;

positioning a directional microwave antenna probe into the lumen of the catheter such that a longitudinal fluid lumen of the directional microwave antenna probe is in fluid communication with the lumen of the catheter;

transmitting microwave energy to the directional microwave antenna probe such that a desired tissue effect may be achieved;

repositioning the directional microwave antenna probe in the lumen of the catheter; and

transmitting the microwave energy to the directional microwave antenna probe.

2. The method according to claim 1 , wherein the catheter is made from a radiofrequency transparent material selected from the group consisting of fiberglass and high temperature composite plastic.

3. The method according to claim 2 , wherein the distal portion of the catheter is made from a material selected from the group consisting of metal, ceramic and plastic.

4. The method according to claim 2 , further comprising providing a fluid to the directional microwave antenna probe via the lumen of the catheter from a fluid port disposed adjacent the proximal portion of the catheter.

5. The method according to claim 1 , further comprising providing a fluid-tight seal between the catheter and the directional microwave antenna probe when the catheter and the directional microwave antenna probe are operably coupled to one another via a diaphragm operably coupled to the proximal portion of the catheter.

6. The method according to claim 1 , wherein repositioning includes rotating the directional microwave antenna probe within the lumen of the catheter.

7. The method according to claim 1 , further comprising selectively coupling the directional microwave antenna probe to the catheter.

8. The method according to claim 1 , further comprising coupling the catheter to a rigid introducer sheath.

9. A method of performing an electrosurgical procedure, comprising:

percutaneously accessing tissue with a catheter including an open proximal portion and a closed distal portion configured to access tissue;

positioning a directional microwave antenna probe adapted to connect to a source of electrosurgical energy into the catheter, wherein the directional microwave antenna probe is rotatable within the catheter for directing an emission of electrosurgical energy therefrom to tissue;

coupling the directional microwave antenna probe to the catheter such that a longitudinal fluid lumen of the directional microwave antenna probe is fluidly coupled to a lumen of the catheter; and

transmitting electrosurgical energy to the directional microwave antenna probe to treat tissue.

10. The method according to claim 9 , wherein the catheter is made from a radiofrequency transparent material selected from the group consisting of fiberglass and high temperature composite plastic.

11. The method according to claim 9 , wherein the closed distal portion of the catheter is made from a material selected from the group consisting of metal, ceramic, and plastic.

12. The method according to claim 9 , wherein the lumen of the catheter is in fluid communication with a fluid port operably disposed adjacent the open proximal portion of the catheter.

13. The method according to claim 9 , further comprising providing a diaphragm at the open proximal portion of the catheter, the diaphragm configured to provide a substantially fluid-tight seal between the catheter and the directional microwave antenna probe when the catheter and the directional microwave antenna probe are operably coupled to one another.

14. The method according to claim 9 , wherein percutaneously accessing tissue includes using an imaging device for image-guided placement of the catheter relative to the tissue.

15. The method according to claim 14 , wherein the imaging device is selected from the group consisting of a CAT scan device, an ultrasound device, and a magnetic imaging device.