US 12,458,426 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. 16/982,396
Filed by CREO MEDICAL LIMITED, Chepstow (GB)
PCT Filed Jun. 27, 2019, PCT No. PCT/EP2019/067166
§ 371(c)(1), (2) Date Sep. 18, 2020,
PCT Pub. No. WO2020/011546, PCT Pub. Date Jan. 16, 2020.
Claims priority of application No. 1811434 (GB), filed on Jul. 12, 2018.
Prior Publication US 2021/0052317 A1, Feb. 25, 2021
Int. Cl. A61B 18/12 (2006.01); A61B 18/00 (2006.01); A61B 18/14 (2006.01); A61B 18/18 (2006.01)
CPC A61B 18/1206 (2013.01) [A61B 18/14 (2013.01); A61B 18/1815 (2013.01); A61B 2018/00077 (2013.01); A61B 2018/00083 (2013.01); A61B 2018/00541 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00601 (2013.01); A61B 2018/1823 (2013.01); A61B 2018/1838 (2013.01); A61B 2018/1861 (2013.01); A61B 2018/1892 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electrosurgical instrument comprising:
a coaxial feed cable for conveying microwave energy or 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 feed cable to receive the microwave energy or the radiofrequency energy, the radiating tip comprising:
an energy delivery structure configured to deliver the microwave energy or the radiofrequency energy received from the coaxial feed cable from an outer surface of the radiating tip, wherein the energy delivery structure comprises an elongate conductor electrically connected to the inner conductor and extending in a longitudinal direction beyond the distal end of the coaxial feed cable; and
a dielectric body disposed around the elongate conductor of the energy delivery structure, wherein the elongate conductor extends within a channel in the dielectric body;
wherein the dielectric body comprises a cavity therein, the cavity being disposed adjacent to the channel within which the elongate conductor extends to facilitate flexure of the radiating tip,
wherein the radiating tip further includes an outer sheath disposed around a radially outer surface of the dielectric body, wherein the outer sheath is separate from the dielectric body to allow relative movement between the outer sheath and the dielectric body.