Patent ID: 7905881

Claim:
A surgical instrument comprising: a first grasping member; a second grasping member which is configured to open and close to the first grasping member, and to enable grasping a living tissue between them; a high-frequency operation unit which includes a first electrode provided in the first grasping member and a second electrode provided in the second grasping member, the first electrode and the second electrode facing each other to provide a high-frequency operation region between them, and the high-frequency operation region being configured to coagulate the living tissue grasped by the first and second grasping members when high frequency current is applied between the first and second electrodes; and an ultrasonic operation unit which includes an ultrasonic vibrating portion provided in one of the first and second grasping members, formed integrally with one of the first and second electrodes by using the same material as that of one of the first and second electrodes, and connected to an ultrasonic transducer to generate ultrasonic vibration, and a pressing portion provided in the other of the first and second grasping members and facing the ultrasonic vibrating portion, the pressing portion and the ultrasonic vibrating portion providing an ultrasonic operation region configured to press the living tissue grasped by the first and second grasping members and to coagulate and cut the pressed living tissue when the ultrasonic vibration is transferred to the ultrasonic vibrating portion from the ultrasonic transducer, wherein the high-frequency operation region configured to treat living tissue and provided between the first electrode and the second electrode, and the ultrasonic operation region configured to treat living tissue and provided between the pressing portion and the ultrasonic vibrating portion, are arranged, respectively between the first grasping member and the second grasping member, and the high frequency operation region is positioned at a position excluding the ultrasonic operation region.