Patent ID: 9381066
Filing Date: 2016-07-05
CPC Classification: A61B

Claim Text:
1. An electrosurgical instrument for performing resection or dissection by applying to a biological tissue radiofrequency electromagnetic RF EM energy having a first frequency and microwave EM energy having a second frequency higher than the first frequency, the instrument comprising: a handheld body having an elongate probe member extending therefrom, the elongate probe member having at its distal end an instrument tip comprising a clamping mechanism having a first clamping member and a second clamping member that are movable relative to each other between an open configuration for receiving a biological vessel between a first surface on the first clamping member and a second surface on the second clamping member, the first surface and the second surface being opposite to one another in the instrument tip, and a closed configuration for contacting opposite sides of the received biological vessel, wherein the first clamping member includes a first energy delivery structure comprising a body made of a first dielectric material, and a first conductive element and a second conductive element which are separated by the first dielectric material; and a coaxial feed cable connected to the handheld body, the coaxial feed cable comprising an inner conductor, an outer conductor coaxial with the inner conductor, and a second dielectric material separating the outer conductor and the inner conductors, the coaxial feed cable being for conveying to the handheld body, simultaneously or separately, an RF signal having the first frequency and a microwave signal having the second frequency; wherein the inner conductor is electrically connected to the first conductive element of the first energy delivery structure and the outer conductor is electrically connected to the second conductive element of the first energy delivery structure to enable the first surface to emit independently the RF signal and the microwave signal, and wherein the first conductive element of the first energy delivery structure and the second conductive element of the first energy delivery structure are arranged at the first surface to act: