Claims
- 1. A surgical tissue ablation device comprising:
a catheter shaft having an antenna lumen; an impedance-matched microwave antenna carried in the antenna lumen of the catheter shaft; at least one cooling lumen in the catheter shaft around the antenna lumen for circulation of cooling fluid; and a microwave generator operatively coupled to the antenna for energizing the antenna to create a lesion in tissue targeted for treatment around the catheter shaft having a controlled location and size.
- 2. The tissue ablation device of claim 1, further comprising:
a tip attached to an end of the catheter shaft for penetrating the tissue targeted for treatment; and
- 3. The tissue ablation device of claim 1, wherein the catheter shaft has an outer diameter of about 4.75 millimeters (mm), the antenna lumen has a diameter of about 2.54 mm, the at least one cooling lumen has a thickness of about 0.76 mm, and a wall thickness around the at least one cooling lumen is about 0.12 mm.
- 4. The tissue ablation device of claim 1, wherein the catheter shaft has an outer diameter of about 3.45 millimeters (mm), the antenna lumen has a diameter of about 2.54 mm, the at least one cooling lumen has a thickness of about 0.20 mm, and a wall thickness around the at least one cooling lumen is about 0.12 mm.
- 5. The tissue ablation device of claim 1, wherein the at least one cooling lumen comprises four cooling lumens around the antenna lumen.
- 6. A method of thermally treating tissue comprising:
penetrating tissue targeted for treatment with a catheter shaft carrying an impedance-matched microwave antenna; and energizing the microwave antenna to create a lesion in the targeted tissue having a controlled location and size; and circulating cooling fluid around the microwave antenna while energizing the microwave antenna to create the lesion.
- 7. The method of claim 6, wherein the step of penetrating targeted tissue comprises:
laparascopically inserting the catheter shaft through a port into the targeted tissue.
- 8. The method of claim 6, wherein the step of penetrating targeted tissue comprises:
percutaneously inserting the catheter shaft through skin into the targeted tissue.
- 9. The method of claim 6, wherein the step of energizing the microwave antenna is performed for no greater than about 10 minutes.
- 10. The method of claim 6, wherein the lesion has a total diameter greater than about 2 centimeters.
- 11. The method of claim 6, wherein the cooling fluid has a temperature of about 37° C.
- 12. The method of claim 6, wherein the step of energizing the microwave antenna comprises delivering a constant power of about 50 Watts.
CROSS-REFERENCE TO RELATED APPLICATION(S)
[0001] This application claims priority from U.S. Provisional Application No. 60/323,491 filed Sep. 19, 2001 for “Microwave Ablation Device” by E. Rudie and S. Kluge, and also claims priority from U.S. Provisional Application No. 60/338,250 filed Nov. 2, 2001 for “Microwave Ablation Device” by E. Rudie and S. Kluge.
[0002] The aforementioned U.S. Provisional Application Nos. 60/323,491 and 60/338,250 are hereby incorporated by reference in their entirety.
Provisional Applications (2)
|
Number |
Date |
Country |
|
60323491 |
Sep 2001 |
US |
|
60338250 |
Nov 2001 |
US |