ELECTROSURGICAL APPARATUS FOR RF AND MICROWAVE DELIVERY
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Abstract
A control system for electrosurgical apparatus in which the energy delivery profile of both RF EM radiation and microwave EM radiation delivered to a probe is set based on sampled voltage and current information of RF energy conveyed to the probe and/or sampled forward and reflected power information for the microwave energy conveyed to and from the probe. The energy delivery profile for the RF EM radiation is for tissue cutting (without requiring a sharp blade) and the energy delivery profile for the microwave EM radiation is for haemostasis or sealing or coagulation or ablation of tissue. The RF EM radiation and microwave EM radiation may be applied separately or simultaneously.
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Citations
53 Claims
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1-27. -27. (canceled)
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28. Electrosurgical apparatus for resection of biological tissue, the apparatus comprising:
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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 a RF detection signal indicative of the current and voltage; a microwave signal detector for sampling forward and reflected power on the microwave channel and generating therefrom a microwave detection signal indicative of the microwave power delivered by the probe; and a controller in communication with the RF signal detector and microwave signal detector to receive the RF detection signal and 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 haemostasis or sealing or coagulation or ablation of tissue, characterised in that; the controller comprises a digital microprocessor programmed to output an RF control signal for the RF signal generator and a microwave control signal for the microwave signal generator, the RF control signal and the microwave control signal being for setting the energy delivery profile for the RF EM radiation and the microwave EM radiation respectively, and 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 microwave detection signal respectively. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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Specification