US 12,082,866 B2
Electrosurgical instrument
Christopher Paul Hancock, Bath (GB); Patrick Burn, Chepstow (GB); and Pallav Shah, Chepstow (GB)
Assigned to CREO MEDICAL LIMITED, Chepstow (GB)
Appl. No. 17/058,042
Filed by CREO MEDICAL LIMITED, Chepstow (GB)
PCT Filed May 24, 2019, PCT No. PCT/EP2019/063488
§ 371(c)(1), (2) Date Nov. 23, 2020,
PCT Pub. No. WO2019/228927, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 1808810 (GB), filed on May 30, 2018.
Prior Publication US 2021/0196376 A1, Jul. 1, 2021
Int. Cl. A61B 18/12 (2006.01); A61B 1/005 (2006.01); A61B 1/018 (2006.01); A61B 18/00 (2006.01); A61B 18/14 (2006.01); A61B 18/16 (2006.01); A61B 18/18 (2006.01)
CPC A61B 18/1206 (2013.01) [A61B 1/005 (2013.01); A61B 1/018 (2013.01); A61B 18/1492 (2013.01); A61B 18/16 (2013.01); A61B 18/1815 (2013.01); A61B 2018/00077 (2013.01); A61B 2018/00083 (2013.01); A61B 2018/00482 (2013.01); A61B 2018/00541 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00589 (2013.01); A61B 2018/00601 (2013.01); A61B 2018/00982 (2013.01); A61B 2018/00994 (2013.01); A61B 2018/1861 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An electrosurgical instrument comprising:
a coaxial feed cable for conveying microwave energy and radiofrequency energy, the coaxial feed cable having an inner conductor, an outer conductor, and a dielectric material separating the inner conductor and the outer conductor; and
a radiating tip disposed at a distal end of the coaxial cable to receive the microwave energy and the radiofrequency energy, the radiating tip comprising:
a longitudinally extending dielectric body;
a distal electrode and a proximal electrode disposed on a surface of the dielectric body, wherein the distal electrode and the proximal electrode are physically separated from each other in the longitudinal direction by an intermediate portion of the longitudinally extending dielectric body; and
a tuning element mounted in the intermediate portion of the longitudinally extending dielectric body to enable both effective bipolar radiofrequency ablation and/or coagulation and microwave ablation,
wherein the distal electrode is electrically connected to the inner conductor,
wherein the proximal electrode is electrically connected to the outer conductor,
wherein the distal electrode and the proximal electrode are configured as an active electrode and a return electrode for delivering the radiofrequency energy to perform bipolar radiofrequency ablation or coagulation,
wherein the radiating tip is operable as an antenna for emitting the microwave energy to perform microwave ablation, wherein the distal electrode and the proximal electrode act as radiating elements of the antenna, and
wherein the electrosurgical instrument is connected to receive the microwave energy and the radiofrequency energy from an electrosurgical generator.