[특허]Electrosurgical devices having dielectric loaded coaxial aperture with distally positioned resonant structure and method of manufacturing same

Electrosurgical devices having dielectric loaded coaxial aperture with distally positioned resonant structure and method of manufacturing same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61B-018/04 A61B-018/18 A61B-018/00 H01Q-001/42 H01Q-009/16 H01Q-009/30 A61B-018/14 A61B-017/00
출원번호	US-0604261 (2015-01-23)
등록번호	US-10213255 (2019-02-26)
발명자 / 주소	Brannan, Joseph D.
출원인 / 주소	COVIDIEN LP
대리인 / 주소	Carter, Deluca, Farrell & Schmidt, LLP
인용정보	피인용 횟수 : 0 인용 특허 : 49

초록 ▼

An electrosurgical device for directing energy to a target volume of tissue includes a coaxial feedline having an inner conductor, an outer conductor and a dielectric material disposed therebetween. A proximal cylindrical dielectric sleeve is coupled to the inner conductor at a distal end of the coaxial feedline. A distal cylindrical dielectric sleeve is coupled to the inner conductor. First and second dielectric segments are coupled to the inner conductor and disposed between the proximal cylindrical dielectric sleeve and the distal cylindrical dielectric sleeve. The device also includes an elongated shaft overlying the proximal cylindrical dielectric sleeve, the first dielectric segment, the second dielectric segment and the distal cylindrical dielectric sleeve. The elongated shaft includes an opening defined therethrough, wherein the opening is at least partially aligned with the first dielectric segment. A balun structure is disposed on the elongated shaft, at least partially overlying the opening in the elongated shaft.

대표청구항 ▼

1. An electrosurgical device for delivering energy to tissue, comprising: an antenna assembly defining a longitudinal axis and including a dielectric sleeve, the dielectric sleeve including: a first dielectric segment; anda second dielectric segment configured to be coupled to the first dielectric segment about the longitudinal axis of the antenna assembly, the first and second dielectric segments cooperatively defining a longitudinal channel extending along the longitudinal axis; anda feedline including a dielectric material surrounding an inner conductor, the inner conductor including a distal portion disposed distally beyond the dielectric material, the distal portion of the inner conductor disposed within the channel defined by the first and second dielectric segments. 2. The electrosurgical device of claim 1, wherein the first and second dielectric segments each include at least one planar surface and a partial cylindrical surface. 3. The electrosurgical device of claim 2, wherein the at least one planar surface of the first dielectric segment is disposed in contact with the at least one planar surface of the second dielectric segment. 4. The electrosurgical device according to claim 1, wherein the antenna assembly further includes: a proximal cylindrical sleeve having the distal portion of the inner conductor extending therethrough; anda distal cylindrical sleeve having the distal portion of the inner conductor extending therethrough, the dielectric sleeve disposed between the proximal and distal cylindrical sleeves. 5. The electrosurgical device according to claim 4, wherein the proximal cylindrical sleeve has a dielectric constant, and the distal cylindrical sleeve has a dielectric constant that is different than the dielectric constant of the proximal cylindrical sleeve. 6. The electrosurgical device according to claim 4, wherein a dielectric constant of the distal cylindrical sleeve is greater than a dielectric constant of the proximal cylindrical sleeve. 7. The electrosurgical device according to claim 1, wherein the first dielectric segment has a dielectric constant, and the second dielectric segment has a dielectric constant that is less than the dielectric constant of the first dielectric segment. 8. The electrosurgical device according to claim 1, wherein the first dielectric segment has a diameter that is larger than a diameter of the second dielectric segment. 9. The electrosurgical device according to claim 1, wherein the feedline includes an outer conductor coaxially disposed about the inner conductor, the dielectric material disposed between the inner and outer conductors. 10. The electrosurgical device according to claim 9, wherein the dielectric material extends distally beyond the outer conductor, and the inner conductor extends distally beyond the dielectric material and the outer conductor. 11. An electrosurgical device, comprising: a feedline including an inner conductor surrounded by a dielectric material, a portion of the inner conductor extending distally beyond the dielectric material; anda dielectric sleeve including: a first dielectric segment; anda second dielectric segment configured to be coupled to the first dielectric segment, the first and second dielectric segments surrounding the portion of the inner conductor that extends distally beyond the dielectric material. 12. The electrosurgical device according to claim 11, wherein the portion of the inner conductor that extends distally beyond the dielectric material is received within a longitudinal channel defined by the first and second dielectric segments.

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Electrosurgical devices having dielectric loaded coaxial aperture with distally positioned resonant structure and method of manufacturing same 원문보기

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