PROBLEM TO BE SOLVED: To provide an ultrasonic treatment instrument capable of efficiently cooling a probe without deteriorating visibility of a field of operation.SOLUTION: An ultrasonic treatment instrument 1 treats biological tissue by making use of vibrations of an ultrasonic transducer 8. The ultrasonic treatment instrument 1 includes a vibration transmission rod 4 which is an approximately rod-like member subjected to transmission of the vibrations of the ultrasonic transducer 8 and which has one end provided with an ultrasonic treatment part 4a for treating the biological tissue, and a heat transfer member 51 which is brought into pressure contact with the ultrasonic treatment part 4a when the ultrasonic transducer 8 is in a non-oscillatory state.COPYRIGHT: (C)2014,JPO&INPIT【課題】術野の視認性を悪化させずに、効率良くプローブを冷却することが可能な超音波処置具を提供すること。【解決手段】超音波振動子8の振動を利用して生体組織を処置する超音波処置具1を次のように構成する。すなわち、超音波振動子8の振動が伝達される略棒状部材で、一方端部に前記生体組織を処置する超音波処置部4aが設けられた振動伝達ロッド4と、超音波振動子8が非振動状態にあるときに、超音波処置部4aに対して圧接する伝熱部材51と、を超音波処置具1に具備させる。【選択図】図3
