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1. (WO2018220177) ELECTROSURGICAL INSTRUMENT FOR FREEZING AND ABLATING BIOLOGICAL TISSUE

Pub. No.:    WO/2018/220177    International Application No.:    PCT/EP2018/064465
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Sat Jun 02 01:59:59 CEST 2018
IPC: A61B 18/02
A61B 18/18
A61B 18/00
Applicants: CREO MEDICAL LIMITED
Inventors: HANCOCK, Christopher Paul
WHITE, Malcolm
BURN, Patrick
CLEGG, Peter
SHAH, Pallav
Title: ELECTROSURGICAL INSTRUMENT FOR FREEZING AND ABLATING BIOLOGICAL TISSUE
Abstract:
An electrosurgical instrument for applying microwave energy to biological tissue, where the instrument is capable of freezing biological tissue in a region around a radiating tip portion and applying microwave energy to the frozen tissue. By freezing the region around the radiating tip portion, microwave energy radiated from the radiating tip portion can be transmitted through the frozen region with low losses and into tissue surrounding the frozen region. This enables the size of the treatment area to be increased without having to increase the amount of microwave energy delivered to the radiating tip portion. The instrument comprises a transmission line, a radiating tip, a fluid feed for conveying a tissue-freezing fluid, and a thermal transfer portion arranged to provide thermal communication between the tissue- freezing fluid and biological tissue in a treatment zone.