Patent ID: 9333034
Filing Date: 2016-05-10
CPC Classification: A61B,H05B

Claim Text:
1. An electrosurgical apparatus for resection of biological tissue, the apparatus comprising: a radiofrequency (RF) signal generator for generating RF electromagnetic (EM) radiation having a first frequency; a microwave signal generator for generating microwave EM radiation having a second frequency that is higher than the first frequency; a probe arranged to deliver the RF EM radiation and the microwave EM radiation separately or simultaneously from a distal end thereof; a feed structure for conveying the RF EM radiation and the microwave EM radiation to the probe, the feed structure comprising an RF channel for connecting the probe to the RF signal generator, and a microwave channel for connecting the probe to the microwave signal generator; an RF signal detector for sampling current and voltage on the RF channel and generating therefrom an RF detection signal (S a microwave signal detector for sampling forward and reflected power on the microwave channel and generating therefrom a microwave detection signal (S a controller in communication with the RF signal detector and microwave signal detector to receive the RF detection signal and the microwave detection signal, wherein the controller is operable to select an energy delivery profile for the RF EM radiation and the microwave EM radiation, the energy delivery profile for the RF EM radiation being for tissue cutting and the energy delivery profile for the microwave EM radiation being for hemostasis or sealing or coagulation or ablation of tissue, wherein the controller comprises a digital microprocessor programmed to output an RF control signal (C wherein the controller is arranged to determine a state for the RF control signal and the microwave control signal based on the received RF detection signal and the received microwave detection signal respectively.