US 12,262,909 B2
Electrosurgical instrument
George Christian Ullrich, Angelsey (GB); David Edward Webb, Bangor (GB); Christopher Paul Hancock, Chepstow (GB); and Malcolm White, Chepstow (GB)
Assigned to CREO MEDICAL LIMITED, Chepstow (GB)
Appl. No. 18/718,746
Filed by Creo Medical Limited, Monmouth (GB)
PCT Filed Dec. 14, 2022, PCT No. PCT/EP2022/085964
§ 371(c)(1), (2) Date Jun. 11, 2024,
PCT Pub. No. WO2023/117649, PCT Pub. Date Jun. 29, 2023.
Claims priority of application No. 2119001 (GB), filed on Dec. 24, 2021.
Prior Publication US 2024/0415532 A1, Dec. 19, 2024
Int. Cl. A61B 17/3203 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/3203 (2013.01) [A61B 17/00234 (2013.01); A61B 2017/00225 (2013.01); A61B 2017/00296 (2013.01); A61B 2017/00477 (2013.01); A61B 2017/00526 (2013.01); A61B 2017/00544 (2013.01); A61B 2017/00836 (2013.01); A61B 2017/00862 (2013.01); A61B 2017/00929 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electrosurgical instrument for delivering pressurised fluid to a biological tissue, and for delivering radiofrequency (RF) electromagnetic (EM) energy and/or microwave frequency EM energy to the biological tissue, the electrosurgical instrument comprising:
a flexible shaft having a first fluid channel for conveying the pressurised fluid;
an instrument tip connected and extending distally from to a distal end of the flexible shaft, the instrument tip having a second fluid channel for receiving the pressurised fluid from the first fluid channel, wherein the second fluid channel comprises a nozzle at a distal end thereof for delivering the pressurised fluid directly to the biological tissue, wherein the nozzle is fixed relative to the flexible shaft;
the instrument tip comprising a planar body made of a first dielectric material separating a first conductive element on a first surface thereof from a second conductive element on a second surface thereof, the second surface facing in an opposite direction to the first surface;
the flexible shaft comprising a coaxial feed cable comprising an inner conductor, an outer conductor coaxial with the inner conductor, and a second dielectric material separating the inner and outer conductors, the coaxial feed cable being for conveying an RF signal and/or microwave signal;
wherein the inner conductor is electrically connected to the first conductive element and the outer conductor is electrically connected to the second conductive element to enable the instrument tip to receive the RF signal and/or the microwave signal; and
wherein the electrosurgical instrument further includes an outer sleeve extending over the flexible shaft and a proximal section of the instrument tip to reinforce the flexible shaft and a junction between the flexible shaft and instrument tip.