High-frequency treatment tool

Abstract

PROBLEM TO BE SOLVED: To easily constitute a high-frequency treatment instrument with a needle-shaped knife for efficient treatment of mucosal ablation and the like, and to ensure safety in treatment. SOLUTION: In the high-frequency treatment instrument, a hard chassis 20 is inserted / fixed to a chip of a flexible sheath 2. The hard chassis 20 comprises a through-hole 21 with a diameter larger than an outside diameter of a needle-shaped knife 13. A front end face 20a and a front end face 2a of the flexible sheath 2 constitute a circular end wall P in which their surfaces are approximately coincided with each other to make one flat surface. A rear end face 20b of the hard chassis 20 is a tapered face. The needle-shaped knife 13 comprises stopper projections 22, and a front end face 22a thereof is a slope face which can be fitted to the tapered face. Thereby the projecting length of the needle-shaped knife 13 is regulated, and a communicating way 24 is installed between the adjacent stopper projections 22, 22. COPYRIGHT: (C)2007,JPO&INPIT

Description

technical field [0001] The present invention relates to a high-frequency treatment tool inserted into a treatment tool insertion channel (channel) of an endoscope and used for treatment such as incision of a lesioned mucous membrane. Background technique [0002] When a lesion such as a tumor is found in the mucous membrane of the body cavity such as the esophagus, stomach, duodenum, and large intestine through endoscopic examination, the lesioned mucous membrane is excised using a high-frequency treatment tool. At this time, in order to ensure the safety of the treatment, the treatment is performed under the observation of the endoscope, and the high-frequency treatment tool used for this purpose is inserted into the treatment tool insertion channel of the endoscope and guided to the site requiring treatment . Here, in the inner wall of the body cavity, a submucosa exists below the mucosal layer, and the muscle layer is covered by the submucosa. Moreover, the use of high-...

AI Technical Summary

Problems solved by technology

Here, the electrical insulating member needs to be made of a material with good heat resistance. For this reason, it is desirable to be made of ceramics, but there is a problem that it is difficult to form through holes of the above-mentioned shape in the ceramics.

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