IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0640624
(2006-12-18)
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등록번호 |
US-8690868
(2014-04-08)
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발명자
/ 주소 |
- Moorman, Jack W.
- Bush, M. Elizabeth
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출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
204 |
초록
▼
A modular biopsy, ablation and track coagulation needle apparatus is disclosed that allows the biopsy needle to be inserted into the delivery needle and removed when not needed, and that allows an inner ablation needle to be introduced and coaxially engaged with the delivery needle to more effective
A modular biopsy, ablation and track coagulation needle apparatus is disclosed that allows the biopsy needle to be inserted into the delivery needle and removed when not needed, and that allows an inner ablation needle to be introduced and coaxially engaged with the delivery needle to more effectively biopsy a tumor, ablate it and coagulate the track through ablation while reducing blood loss and track seeding. The ablation needle and biopsy needle are adapted to in situ assembly with the delivery needle. In a preferred embodiment, the ablation needle, when engaged with the delivery needle forms a coaxial connector adapted to electrically couple to an ablating source. Methods for biopsying and ablating tumors using the device and coagulating the track upon device removal are also provided.
대표청구항
▼
1. A method of ablating tissue, the method comprising: providing a system for ablation of tissue having: a microwave antenna,a transmission line coupled to the microwave antenna, anda microwave power source, wherein the transmission line is adapted to electrically couple to the microwave power sourc
1. A method of ablating tissue, the method comprising: providing a system for ablation of tissue having: a microwave antenna,a transmission line coupled to the microwave antenna, anda microwave power source, wherein the transmission line is adapted to electrically couple to the microwave power source;introducing a distal end of the microwave antenna into tissue to be ablated, whereby an insertion track is created within the tissue;ablating the tissue by applying microwave power to create a microwave field suitable for ablation of the tissue;following ablation of the tissue, altering the microwave field to produce a field suited for insertion track ablation; andwhile withdrawing the microwave antenna from the tissue to be ablated, ablating at least a portion of the insertion track. 2. The method of claim 1, wherein introducing comprises introducing the microwave antenna through a lumen of a delivery needle, and wherein the physical dimensions of the microwave antenna are changed by displacing the microwave antenna within the lumen of the delivery needle. 3. The method of claim 2, wherein the microwave antenna is displaced proximally with respect to the delivery needle. 4. The method of claim 2, wherein the microwave antenna is displaced distally with respect to the delivery needle. 5. The method of claim 2, wherein the physical dimensions of the microwave antenna are changed by removing the microwave antenna and replacing it with a second microwave antenna of different physical dimensions. 6. The method of claim 1, wherein ablating the tissue comprises creating a predetermined isotherm at a first predetermined distance from the microwave antenna, and wherein ablating the insertion track comprises creating the predetermined isotherm at a second predetermined distance from the microwave antenna, wherein said second predetermined distance is less than said first predetermined distance. 7. The method of claim 1, wherein said step of ablating the insertion track comprises: ablating a first portion of the insertion track;repositioning the microwave antenna to a new position; andablating a second portion of the insertion track. 8. The method of claim 7, wherein the system for ablation comprises markings, and wherein said markings are used to determine the new position of the microwave antenna during said repositioning step. 9. A method of ablating tissue, the method comprising: introducing a microwave antenna into selected tissue, whereby an insertion track is created proximal to the microwave antenna;performing an initial ablation on the selected tissue by applying microwave power to create a microwave field suitable for ablation of the selected tissue;following ablation of the selected tissue, altering the microwave field to produce a field suited for insertion track ablation; andwhile withdrawing the microwave antenna from the tissue to be ablated, ablating at least a portion of the insertion track. 10. The method of claim 9, wherein introducing comprises introducing the microwave antenna through a lumen of a delivery needle, and wherein the physical dimensions of the microwave antenna are changed by displacing the microwave antenna within the lumen of the delivery needle. 11. The method of claim 10, wherein the microwave antenna is displaced proximally with respect to the delivery needle. 12. The method of claim 10, wherein the microwave antenna is displaced distally with respect to the delivery needle. 13. The method of claim 10, wherein the physical dimensions of the microwave antenna are changed by removing the microwave antenna and replacing it with a second microwave antenna of different physical dimensions. 14. The method of claim 9, wherein ablating the tissue comprises creating a predetermined isotherm at a first predetermined distance from the microwave antenna, and wherein said step of ablating the insertion track comprises creating the predetermined isotherm at a second predetermined distance from the microwave antenna, wherein said second predetermined distance is less than said first predetermined distance. 15. The method of claim 9, further comprising: repositioning the microwave antenna; andablating a second portion of the insertion track. 16. A modular needle kit for ablation through a puncture site, comprising: a delivery needle insertable through the puncture site, said delivery needle having an open proximal end and an open distal end with a lumen extending therebetween;an ablation needle adapted for coagulating an insertion track and ablating tissue along a length of said ablation needle, said ablation needle comprising a transmission line and a microwave antenna electrically coupled to said transmission line, wherein said transmission line comprises a first conductor;wherein said microwave antenna is insertable through said open proximal end of said delivery needle and extends beyond said open distal end of said delivery needle when said ablation needle is distally displaced within said lumen of said delivery needle, and wherein said ablation needle is further adapted to ablate tissue surrounding said microwave antenna and surrounding said transmission line;a positional connector detachably connecting said ablation needle to said delivery needle, the positional connector including a first connector disposed on said delivery needle and a second connector disposed on said ablation needle configured to engage said first connector to fixedly connect a proximal end of said ablation needle to a proximal end of said delivery needle; anda coaxial extension disposed between said first connector and said second connector, said coaxial extension comprising a second conductor adapted to couple to said first conductor. 17. The kit of claim 16, wherein said positional connector comprises an external clamp attachable about said proximal end of said ablation needle and said open proximal end of said delivery needle. 18. The kit of claim 16, wherein said delivery needle is formed of a nonconductive material and comprises a distal portion having a diameter of 17 gauge or smaller and a flat distal end. 19. The kit of claim 16, wherein said second connector threadably connects to said first connector.
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