Various high-strength microwave antenna assemblies are described herein. The microwave antenna has a radiating portion connected by a feedline to a power generating source, e.g., a generator. The antenna is a dipole antenna with the distal end of the radiating portion being tapered and terminating a
Various high-strength microwave antenna assemblies are described herein. The microwave antenna has a radiating portion connected by a feedline to a power generating source, e.g., a generator. The antenna is a dipole antenna with the distal end of the radiating portion being tapered and terminating at a tip to allow for direct insertion into tissue. Antenna rigidity comes from placing distal and proximal radiating portions in a pre-stressed state, assembling them via threaded or overlapping joints, or fixedly attaching an inner conductor to the distal portion. The inner conductor is affixed to the distal portion by, e.g., welding, brazing, soldering, or by adhesives. A junction member made from a hard dielectric material, e.g., ceramic, can be placed between the two portions and can have uniform or non-uniform shapes to accommodate varying antenna designs. Electrical chokes may also be used to contain returning currents to the distal end of the antenna.
대표청구항▼
1. A microwave antenna assembly comprising: a proximal radiating portion having an inner conductor and an outer conductor separated by a dielectric layer;a distal radiating portion disposed distally of the proximal radiating portion, the inner conductor extending at least partially through the dista
1. A microwave antenna assembly comprising: a proximal radiating portion having an inner conductor and an outer conductor separated by a dielectric layer;a distal radiating portion disposed distally of the proximal radiating portion, the inner conductor extending at least partially through the distal radiating portion; andan electrical choke disposed proximally of the distal radiating portion and including a conductive layer in electrical contact with the outer conductor, at least a portion of the conductive layer separated from the outer conductor by an inner dielectric layer. 2. The microwave antenna assembly according to claim 1, further comprising a junction member disposed between the proximal and distal radiating portions, wherein the inner conductor extends through an opening of the junction member. 3. The microwave antenna assembly according to claim 2, wherein the distal and proximal radiating portions apply a compressive force on at least a portion of the junction member. 4. The microwave antenna assembly according to claim 2, wherein the junction member has a radial thickness that is non-uniform about a longitudinal axis defined by the junction member. 5. The microwave antenna assembly according to claim 1, further comprising a second inner dielectric layer disposed over the inner dielectric layer. 6. The microwave antenna assembly according to claim 1, wherein the electrical choke is covered by a coating configured to conform the electrical choke to the outer conductor. 7. The microwave antenna assembly according to claim 1, wherein the electrical choke is attached to the outer conductor by a method selected from the group consisting of welding, brazing, soldering, crimping, and conductive adhesives. 8. The microwave antenna assembly according to claim 1, further comprising a sealant coating disposed at least partially over at least one of the distal radiating portion or the proximal radiating portion. 9. The microwave antenna assembly according to claim 8, wherein a gap is defined between the electrical choke and the sealant coating. 10. The microwave antenna assembly according to claim 8, wherein the electrical choke and sealant coating at least partially overlap. 11. The microwave antenna assembly according to claim 8, wherein the sealant coating comprises a thermoplastic polymer. 12. A microwave ablation system, comprising: an electrosurgical energy source;a microwave antenna assembly operatively connected to the electrosurgical energy source, the microwave antenna assembly including: a proximal radiating portion having an inner conductor and an outer conductor separated by a dielectric layer;a distal radiating portion disposed distally of the proximal radiating portion, the inner conductor extending at least partially through the distal radiating portion; andan electrical choke disposed proximally of the distal radiating portion and including a conductive layer in electrical contact with the outer conductor, at least a portion of the conductive layer separated from the outer conductor by an inner dielectric layer. 13. The microwave ablation system according to claim 12, wherein the antenna assembly further comprises a junction member disposed between the proximal and distal radiating portions, wherein the inner conductor extends through an opening of the junction member. 14. The microwave ablation system according to claim 13, wherein the distal and proximal radiating portions apply a compressive force on at least a portion of the junction member. 15. The microwave ablation system according to claim 12, wherein the antenna assembly further includes a second inner dielectric layer disposed over the inner dielectric layer. 16. The microwave ablation system according to claim 12, wherein the electrical choke is disposed at least partially over the proximal radiating portion. 17. The microwave ablation system according to claim 12, wherein the electrosurgical energy source is a microwave generator.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (158)
Tu Lily Chen ; Tu Hosheng, Ablation apparatus and methods for treating atherosclerosis.
Stern Roger A. (Cupertino CA) Edwards Stuart D. (Los Altos CA) Jackson Jerome (Sunnyvale CA) Rosen Arye (Cherry Hill NJ), Articulated unidirectional microwave antenna systems for cardiac ablation.
Fogarty, Thomas J.; Willis, David B.; Howell, Thomas A.; Hermann, George D.; Wilson, Peter M.; Bush, Elizabeth M.; Kim, Steven W.; Turovskiy, Roman, Device for accurately marking tissue.
Fogarty, Thomas J.; Willis, David B.; Howell, Thomas A.; Hermann, George D.; Wilson, Peter M.; Bush, M. Elizabeth, Device for accurately marking tissue.
Thomas J. Fogarty ; David B. Willis ; Thomas A. Howell ; George D. Hermann ; Peter M. Wilson ; M. Elizabeth Bush, Device for accurately marking tissue.
Carl James R. ; Arndt G. Dickey ; Fink Patrick W. ; Beer N. Reginald ; Henry Phillip D. ; Pacifico Antonio ; Raffoul George W., Endothelium preserving microwave treatment for atherosclerosis.
Malecki,William; Francis,Dan; Horne,Kenneth; Deem,Mark E.; Gifford,Hanson; Alejandro,Jose, Energy based devices and methods for treatment of anatomic tissue defects.
Miller Richard H. (Pittsburgh PA) Bates Brian L. (Bloomington IN) Hall Todd A. (Bloomington IN) Osborne Thomas A. (Bloomington IN), Guide for localizing a nonpalpable breast lesion.
Rosen Arye ; Edwards Stuart D. ; Lax Ronald G. ; Sharkey Hugh R. ; Lundquist Ingemar H. ; Walinsky Paul, Medical probe apparatus with enhanced RF, resistance heating, and microwave ablation capabilities.
Rosen Arye (Cherry Hill NJ) Edwards Stuart D. (Los Altos CA) Lax Ronald G. (Grassvalley CA) Sharkey Hugh R. (Redwood City CA) Lundquist Ingemar H. (Pebble Beach CA), Medical probe apparatus with laser and/or microwave monolithic integrated circuit probe.
Sharkey Hugh R. ; Ashley John ; Saal Joel ; Saal Jeffrey A. ; Le Le Trong, Method for delivering energy adjacent the inner wall of an intervertebral disc.
Kasevich Raymond S. (Weston MA) Dwyer Arthur S. (Braintree MA) Guerreri Bart G. (Framingham MA), Microwave dipole probe for in vivo localized hyperthermia.
Edwards Stuart D. (Los Altos CA) Lax Ronald G. (Grass Valley CA) Lundquist Ingemar H. (Pebble Beach CA) Sharkey Hugh R. (Redwood City CA), Microwave probe device and method.
Brevard Christian,FRX ; Weiss Michel,FRX ; Loewenguth Bernard,FRX ; Mabire Jean-Pierre,FRX, Probe, particulary a urethral probe, for heating of tissues by microwave and for the measurement of temperature by radio.
Jandak Jennifer ; Rosinko Michael J. ; Horzewski Michael J. ; Khairkhahan Alexander, Resistive heating system and apparatus for improving blood flow in the heart.
Edwards Stuart D. (Los Altos CA) Jackson Jerome (Sunnyvale CA) Stern Roger A. (Cupertino CA) Morse Thomas M. (San Jose CA) Owens Patrick M. (Cupertino CA), Steerable antenna systems for cardiac ablation that minimize tissue damage and blood coagulation due to conductive heati.
Visram,Naheed; Shah,Krishan, Surgical perforation device with electrocardiogram (ECG) monitoring ability and method of using ECG to position a surgical perforation device.
Morgan,Roy; Saravia,Heber; Voges,Jens; Prakash,Mani, System and method for regulating an amount of thermal energy generated by an electrosurgical tool.
Eric N. Rudie ; Scott Stockmoe ; Aaron Hjelle ; Bruce W. Ebner ; Joel Crabb ; Jonathan L. Flachman ; Stan Kluge ; Satish Ramadhyani ; Bruce Neilson, Thermal therapy catheter.
Arndt G. Dickey ; Carl James R. ; Raffoul George W. ; Karasack Vincent G. ; Pacifico Antonio ; Pieper Carl F., Transcatheter antenna for microwave treatment.
Turner Paul F. (North Salt Lake UT) Schaefermeyer Theron N. (North Salt Lake UT) Tumeh Amer M. (Salt Lake City UT), Urethral inserted applicator for prostate hyperthermia.
van der Weide, Daniel Warren; Lee, Jr., Fred T.; Brace, Christopher Lee; Schefelker, Richard W.; King, Laura G.; Thom, Mark; Thiel, Matthew, Energy delivery systems and uses thereof.
van der Weide, Daniel Warren; Lee, Jr., Fred T.; Brace, Christopher Lee; Schefelker, Richard W.; King, Laura G.; Thom, Mark; Thiel, Matthew, Energy delivery systems and uses thereof.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.