| 摘要 |
An ultrasonic cutting tip assembly for an ultrasonic surgical cutting instrument having an ultrasonic transducer. The assembly includes a transition horn which is operatively couplable to the transducer, an elongated ultrasonic vibration-transmitting tube which is separable from the horn, and a threaded retaining nut. The threaded portion of the nut threadably engages the threaded portion of the transition horn to hold the proximal end of the tube and the horn together so that ultrasonic vibrations can thereby be efficiently transmitted from the transducer to the distal end of the tube, and then to the surgical site. The nut threaded portion can be formed either on the outside or the inside of the nut, and when on the outside in one embodiment, the nut and tube can be formed as an integral member to be threaded into the distal end of the horn. The elimination of all exposed tip nut surface angles greater than forty-five degrees increases the hydrodynamic performance of the assembly.
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