Ultrasonic treatment instrument

Abstract

A forceps type (scissors type) treatment instrument (7) is provided with: an ultrasonic probe (52) protruding from a treatment instrument body (20) at a position separated to the front end side from a shaft section (22) for supporting a clamp arm (21) so that the clamp arm (21) can pivot relative to the treatment instrument body (20); a jaw (61) provided to the clamp arm (21) at a position separated to the front end side from the shaft section (22) and capable of being, in association with the pivoting operation of the clamp arm (21), displaced between a closed position at which the jaw (61) is in contact with the ultrasonic probe (52) and an open position at which the jaw (61) is separated from the ultrasonic probe (52). A stopper (70) is extended toward the clamp arm (21) side from the treatment instrument body (20) side while the front end-side edge of the stopper (70) is set closer to the front end side than the path of the base end of the jaw (61), the path being formed when a base (60) is displaced. When the jaw (61) is in an open state, the stopper (70) prevents the entry of an organism into the gap (within a region (64), the treatment of which is impossible) between the treatment instrument body (20) and the clamp arm (21) at a position between the base end of the jaw (61) and the shaft section (22).

Description

technical field [0001] The invention relates to an ultrasonic treatment instrument for cutting, excision or coagulation of biological tissues by using ultrasonic waves. Background technique [0002] Conventionally, ultrasonic treatment instruments are known as treatment instruments for surgical treatment. Ultrasonic treatment instruments can perform treatments such as incision, resection, or coagulation of living tissue by, for example, transmitting ultrasonic vibration to living tissue or fusing ultrasonic vibration with high-frequency current and transmitting it to living tissue. [0003] Among ultrasonic treatment instruments, especially suitable for fine and delicate surgical treatment such as thyroidectomy, for example, a pliers type (scissors type) is disclosed in Japanese National Publication No. 2009-514566 ultrasonic treatment equipment. This pliers-type ultrasonic treatment instrument has a treatment instrument main body (handle structure body) and a clamping arm...

AI Technical Summary

Problems solved by technology

In addition, if ultrasonic vibration is performed in a state where metals are in contact with each other, there is a risk of damage to the probe, jaw, etc.

[0006] In addition, in general, the jaw is supported in a state allowing a predetermined swing with respect to the tip end of the clamp arm, but in this structure, there is a gap between the base end side of the jaw and the clamp arm. There is a hidden danger of biological tissue caught in the gap between

In addition, the entrapment of living tissue in such a part also hinders rapid treatment, and may become a factor that impairs the durability of probes, jaws, etc.

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