Problem to be solved: to provide an ultrasonic surgical chip which suppresses unintended deformation of a vibrating chip.An ultrasonic surgical chip used for crushing and emulsifying a lens nucleus which is clouded by cataracts and the like is a shaft extending in the tip direction along the rotation axis, and a crushed portion which is connected to the distal end of the shaft and extends in the tip direction while separating from the rotation axis A curved portion is formed in at least a portion of the crushing portion and extends in the circumferential direction of the rotary shaft. At least a side surface of the curved shape portion is formed in a shape along the approximate concentric circle of the rotary shaft.Diagram【課題】振動するチップの意図せぬ変形を抑制した超音波手術用チップを提供する。【解決手段】白内障等によって白濁した水晶体核を破砕乳化する際に使用される超音波手術用チップは、回転軸に沿って先端方向に伸びる軸部と、軸部の先端側に接続され、回転軸から離間しつつ先端方向に伸びる破砕部と、破砕部の少なくとも一部に形成され、回転軸の周方向に伸びる湾曲形状部とを備える。また、湾曲形状部の少なくとも一部の側面は、回転軸の概同心円に沿った形状で形成されている。【選択図】図2
