Claims
- 1. A modular needle kit for biopsy and ablation through a puncture site, comprising:
an elongated delivery needle made of a conducting material, said delivery needle having an open proximal end and an open distal end with a lumen extending therebetween, said delivery needle having a first connector, said delivery needle extending longitudinally from said first connector to said open distal end a first predetermined distance; an ablation needle comprising a center conductor at least partially surrounded by a dielectric material, said ablation needle further comprising a second connector, said ablation needle extending longitudinally a second predetermined distance from the second connector to a distal end wherein said second predetermined distance is greater than said first predetermined distance whereby said ablation needle forms a distal projection extending beyond the distal end of said delivery needle when said first and second connectors are connected, said distal projection forming a microwave antenna, and wherein the ablation needle and the delivery needle form a coaxial transmission line when the first and second connectors are connected wherein said coaxial transmission line electrically couples to said microwave antenna; and a plurality of first markings on said modular needle kit wherein said first markings are spaced apart approximately an effective antenna length of said microwave antenna.
- 2. The kit of claim 1 wherein said first markings are on a surface of the delivery needle.
- 3. The kit of claim 1 wherein said first markings are on a surface of said ablation needle.
- 4. The kit of claim 1 further comprising a second marking on said modular needle kit, said second marking located approximately adjacent a proximal edge of an antenna radiation pattern of said microwave antenna.
- 5. The kit of claim 4 wherein said second marking is on a surface of said delivery needle.
- 6. The kit of claim 4 wherein said second marking is on a surface of said ablation needle.
- 7. The kit of claim 5 wherein said second marking is visible to the human eye.
- 8. The kit of claim 5 wherein said second marking is detectable by MRI.
- 9. The kit of claim 8 wherein said second marking is selected from the group consisting of paramagnetic materials and diamagnetic materials.
- 10. The kit of claim 5 wherein said second marking is detectable by ultrasound.
- 11. The kit of claim 5 wherein said second marking is radiopaque.
- 12. The kit of claim 5 wherein said plurality of first markings are visible to the human eye.
- 13. The kit of claim 5 wherein said plurality of first markings are detectable by MRI.
- 14. The kit of claim 13, wherein said plurality of first markings are selected from the group consisting of paramagnetic materials and diamagnetic materials.
- 15. The kit of claim 5 wherein said plurality of first markings are detectable by ultrasound.
- 16. The kit of claim 5 wherein said plurality of first markings are radiopaque.
- 17. A modular needle kit for biopsy and ablation through a puncture site, comprising:
an elongated delivery needle having an open proximal end and an open distal end with a lumen extending therebetween, said delivery needle extending longitudinally a first predetermined distance; an ablation needle comprising a transmission line, said transmission line extending longitudinally a second predetermined distance wherein the second predetermined distance is greater than the first predetermined distance whereby said ablation needle forms a distal projection extending beyond the distal end of said delivery needle when said ablation needle is distally displaced within the lumen of said delivery needle, and wherein said distal projection comprises an extension of a conductor of said transmission line, said extension of said conductor forming a microwave antenna electrically coupled to said transmission line; and a plurality of first markings on an outer surface of said delivery needle wherein said first markings are spaced apart approximately an effective antenna length of said microwave antenna.
- 18. The kit of claim 17 further comprising a second marking on the outer surface of said delivery needle, said second marking located approximately adjacent a proximal edge of an antenna radiation pattern of said microwave antenna.
- 19. The kit of claim 18 wherein said second marking is visible to the human eye.
- 20. The kit of claim 18 wherein said second marking is detectable by MRI.
- 21. The kit of claim 18 wherein said second marking is selected from the group consisting of paramagnetic materials and diamagnetic materials.
- 22. The kit of claim 18 wherein said second marking is detectable by ultrasound.
- 23. The kit of claim 18 wherein said second marking is radiopaque.
- 24. A system for ablation of tissue, comprising:
an elongated delivery needle made of a conducting material, said delivery needle having an open proximal end and an open distal end with a lumen extending therebetween, said delivery needle having a first connector, said delivery needle extending longitudinally from said first connector to said open distal end a first predetermined distance; an ablation needle comprising a center conductor at least partially surrounded by a dielectric material, said ablation needle further comprising a second connector, said ablation needle extending longitudinally a second predetermined distance from the second connector to a distal end wherein said second predetermined distance is greater than said first predetermined distance whereby said ablation needle forms a distal projection extending beyond the distal end of said delivery needle when the first and second connectors are connected, said distal projection forming a microwave antenna, and wherein the ablation needle and the delivery needle form a coaxial transmission line when first and second connectors are connected wherein the coaxial transmission line electrically couples to said microwave antenna; a plurality of first markings wherein said first markings are spaced apart approximately an effective antenna length of said microwave antenna; and a microwave energy source, wherein said coaxial transmission line is adapted to electrically couple to said microwave energy source.
- 25. The system of claim 24 wherein said plurality of first markings are on a surface of said delivery needle.
- 26. The system of claim 24 wherein said plurality of first markings are on a surface of said ablation needle.
- 27. A method of ablating abnormalities in a tissue, the method comprising the steps of:
providing a system for ablation of tissue comprising:
an elongated delivery needle made of a conducting material, said delivery needle having an open proximal end and an open distal end with a lumen extending therebetween, said delivery needle having a first connector, said delivery needle extending longitudinally from said first connector to said open distal end a first predetermined distance; an ablation needle comprising a center conductor circumferentially surrounded by a dielectric material, said ablation needle further comprising a second connector, said ablation needle extending longitudinally a second predetermined distance from the second connector to a distal end wherein said second predetermined distance is greater than said first predetermined distance whereby said ablation needle forms a distal projection extending beyond the distal end of said delivery needle when the first and second connectors are connected, said distal projection forming a microwave antenna, and wherein the ablation needle and the delivery needle form a coaxial transmission line when the first and second connectors are connected wherein said coaxial transmission line electrically couples to said microwave antenna; a plurality of first markings on a surface of said delivery needle wherein said first markings are spaced apart approximately an effective antenna length of said microwave antenna; and a microwave energy source, wherein said coaxial transmission line is adapted to electrically couple to said microwave energy source; introducing the distal end of the delivery needle into a tissue sample in a predetermined area; inserting the distal end of the ablating needle into the lumen of the delivery needle through said open proximal end of said delivery needle; advancing the ablating needle until said first and second connectors are adjacent one another; connecting said first and second connectors whereby said coaxial transmission line is formed; coupling said microwave energy source to said coaxial transmission line; ablating the tissue in the predetermined site by delivering microwave energy to said microwave antenna through said coaxial transmission line; partially withdrawing said delivery needle after said ablating step a distance approximately equal to the effective antenna length as indicated by observing at least one of the first markings; and ablating the insertion track left by the partial withdrawal of said delivery needle.
- 28. The method of claim 27 wherein the distal end of the delivery needle is percutaneously introduced into the tissue sample and said step of observing at least one of the first markings occurs as the at least one of the first markings exits a skin of a patient.
- 29. The method of claim 27 wherein the distal end of the delivery needle is laporoscopically introduced into the tissue sample and said step of observing at least one of the first markings occurs as the at least one of the first markings exits a cannula.
- 30. The method of claim 27 wherein said providing step further comprises providing a second marking on a surface of said delivery needle, said second marking located approximately adjacent a proximal edge of an antenna radiation pattern of said microwave antenna, said method further comprising the steps of:
repeating said steps of partially withdrawing and ablating the insertion track so long as the second marking is within an organ containing the abnormality; and observing the position of the second marking wherein if a partial withdrawing step were to withdraw the second marking outside an edge of the organ containing the abnormality, the partial withdrawal is stopped such that the second marking is approximately aligned with the edge of the organ whereupon a final ablation of the insertion track is performed.
- 31. The method of claim 30 wherein the step of observing the second marking is performed by MRI.
- 32. The method of claim 30 wherein the step of observing the second marking is performed by ultrasound imaging.
- 33. The method of claim 30 wherein the step of observing the second marking is performed by fluoroscopic imaging.
- 34. A method of ablating abnormalities in a tissue, the method comprising the steps of:
providing a system for ablation of tissue comprising:
a thermotherapy interstitial ablation device; a plurality of first markings on said ablation device wherein said first markings are spaced apart approximately an effective ablation length of said ablation device; and an ablation energy source, wherein said ablation device is adapted to couple to said ablation energy source; introducing a distal end of the ablation device into a tissue sample in a predetermined area; coupling said ablation energy source to said ablation device; ablating the tissue in the predetermined site by delivering energy to said ablation device; partially withdrawing said ablation device after said ablating step a distance approximately equal to the effective ablation length as indicated by observing at least one of the first markings; and ablating the insertion track left by the partial withdrawal of said ablation device.
- 35. The method of claim 34 wherein said providing step further comprises providing a second marking on said ablation device, said second marking located approximately adjacent a proximal edge of the effective ablation length, said method further comprising the steps of:
repeating said steps of partially withdrawing and ablating the insertion track so long as the second marking is within an organ containing the abnormality; and observing the position of the second marking wherein if a partial withdrawing step were to withdraw the second marking outside an edge of the organ containing the abnormality, the partial withdrawal is stopped such that the second marking is approximately aligned with the edge of the organ whereupon a final ablation of the insertion track is performed.
RELATED APPLICATION
[0001] This application is related to U.S. application “Modular Biopsy and Microwave Ablation Needle Delivery Apparatus Adapted to In Situ Assembly and Method of Use” filed on Jun. 17, 1999, the contents of which are incorporated by reference.
Continuations (1)
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Number |
Date |
Country |
Parent |
09356077 |
Jul 1999 |
US |
Child |
09827528 |
Apr 2001 |
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
09336371 |
Jun 1999 |
US |
Child |
09356077 |
Jul 1999 |
US |