Patent attributes
An electrosurgical instrument of the present invention includes an elongated instrument body, a cylindrical member constituting the instrument body, an ultrasonic transducer provided in inside of the cylindrical member for applying ultrasonic vibration to a fluid flowing into a liquid feed passage, a fluid atomizing port provided at the distal side of the instrument body for injecting the liquid which was given the ultrasonic vibration by the ultrasonic transducer and atomized to a living tissue from the distal end of the instrument body, and an electrode provided at the distal side of the instrument body for discharging high-frequency electric energy along the liquid injected from the fluid atomizing port so as to coagulate a surface layer of the living tissue.
