Directive window ablation antenna with dielectric loading
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-018/18
출원번호
US-0711164
(2012-12-11)
등록번호
US-8628527
(2014-01-14)
발명자
/ 주소
Brannan, Joseph D.
출원인 / 주소
Covidien LP
인용정보
피인용 횟수 :
0인용 특허 :
38
초록▼
An electrosurgical device for directing energy to a target volume of tissue includes a coaxial feedline having an inner conductor, an outer conductor coaxially disposed around the inner conductor, and a dielectric material disposed therebetween. An elongated electrically-conductive member is longitu
An electrosurgical device for directing energy to a target volume of tissue includes a coaxial feedline having an inner conductor, an outer conductor coaxially disposed around the inner conductor, and a dielectric material disposed therebetween. An elongated electrically-conductive member is longitudinally disposed at a distal end of the inner conductor. A balun structure is disposed on the outer conductor. The device also includes an electrically-conductive cylinder coaxially disposed around a distal portion of the balun structure, and a dielectric structure disposed substantially adjacent to a distal end of the electrically-conductive cylinder, wherein the dielectric structure longitudinally extends from the distal end of the electrically-conductive cylinder to a distal end of the electrically-conductive member.
대표청구항▼
1. An electrosurgical device for directing energy to a target volume of tissue, comprising: a coaxial feedline having an inner conductor, an outer conductor coaxially disposed around the inner conductor, and a dielectric material disposed therebetween;an elongated electrically-conductive member long
1. An electrosurgical device for directing energy to a target volume of tissue, comprising: a coaxial feedline having an inner conductor, an outer conductor coaxially disposed around the inner conductor, and a dielectric material disposed therebetween;an elongated electrically-conductive member longitudinally disposed at a distal end of the inner conductor;a balun including: a dielectric layer coaxially disposed around a distal portion of the outer conductor of the feedline; andan electrically-conductive layer coaxially disposed around at least a proximal portion of the dielectric layer;an electrically-conductive cylinder including a first portion coaxially disposed around a distal portion of the electrically-conductive layer of the balun and a second portion disposed distally to the first portion, wherein the second portion distally extends beyond a distal end of the electrically-conductive layer of the balun; anda dielectric structure disposed substantially adjacent to a distal end of the electrically-conductive cylinder, wherein the dielectric structure longitudinally extends from the distal end of the electrically-conductive cylinder to a distal end of the electrically-conductive member. 2. The electrosurgical device of claim 1, wherein a portion of the inner conductor and the dielectric material of the coaxial feedline extends beyond the outer conductor at a distal end of the coaxial feedline. 3. The electrosurgical device of claim 1, wherein the electrically-conductive member is electrically coupled to the inner conductor. 4. The electrosurgical device of claim 1, wherein the balun is a quarter-wave sleeve. 5. The electrosurgical device of claim 1, wherein the electrically-conductive layer includes a first portion coaxially disposed around the proximal portion of the dielectric layer, and a second portion disposed proximally to the first portion, the second portion electrically coupled to the outer conductor. 6. The electrosurgical device of claim 1, wherein the dielectric structure is configured to cover a distal end of the electrically-conductive member. 7. The electrosurgical device of claim 1, further comprising: a cooling chamber disposed at least partially about the electrically-conductive member. 8. The electrosurgical device of claim 7, further comprising: an inflow tube configured to supply a coolant fluid into the cooling chamber; andan outflow tube configured to dispense the coolant fluid from the cooling chamber. 9. The electrosurgical device of claim 8, further comprising: a coolant source to supply the coolant fluid. 10. The electrosurgical device of claim 1, further comprising: a sleeve member including a first sleeve portion and a second sleeve portion, the second sleeve portion disposed distally to the first sleeve portion,wherein the first sleeve portion is disposed proximal to the dielectric structure and the second sleeve portion is configured to partially surround the dielectric structure. 11. The electrosurgical device of claim 10, further comprising an electromagnetic window configured to emit a directional radiation pattern in operation. 12. The electrosurgical device of claim 11, wherein the electromagnetic window is partially defined by longitudinal edges of the second sleeve portion. 13. The electrosurgical device of claim 11, wherein the electromagnetic window includes a radio frequency (RF) transparent material. 14. The electrosurgical device of claim 10, wherein the second sleeve portion includes an engagement portion extending beyond a distal end of the dielectric structure. 15. The electrosurgical device of claim 1, further comprising a tapered portion having a tip configured to penetrate tissue. 16. A method of manufacturing an electrosurgical device, comprising the steps of: providing a coaxial feedline having an inner conductor, an outer conductor, and a dielectric material disposed therebetween;joining an electrically-conductive member to a distal end of the inner conductor at a distal end of the coaxial feedline;forming a dielectric layer around a distal portion of the outer conductor;forming an electrically-conductive layer around a proximal portion of the dielectric layer such that the electrically-conductive layer is electrically coupled to the outer conductor;joining a first portion of an electrically-conductive cylinder to a distal portion of the electrically-conductive layer, a second portion of the electrically-conductive cylinder distally extending beyond a distal end of the electrically-conductive laver; andforming a dielectric structure disposed substantially adjacent to a distal end of the electrically-conductive cylinder, wherein the dielectric structure longitudinally extends from the distal end of the electrically-conductive cylinder to a distal end of the electrically-conductive member. 17. The method of manufacturing an electrosurgical device in accordance with claim 16, wherein the dielectric structure includes a cap of dielectric material configured to cover a distal end of the electrically-conductive member. 18. The method of manufacturing an electrosurgical device in accordance with claim 16, further comprising the step of: joining a sleeve member to the electrically-conductive cylinder, the sleeve member configured to partially surround the dielectric structure. 19. The electrosurgical device of claim 1, wherein the electrically-conductive layer of the balun has a length and the second portion of the electrically-conductive cylinder has a length, and wherein a combined length of the length of the electrically-conductive layer of the balun and the length of the second portion of the electrically-conductive cylinder is a quarter wavelength.
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이 특허에 인용된 특허 (38)
Eshel Uzi (Herzlia ILX) Lev Avigdor (Petach Tikva ILX), Applicator for insertion into a body opening for medical purposes.
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