| 摘要 |
An endoscopic treatment instrument according to the present invention includes: a flexible catheter inserted through a channel in an endoscope; a conductive electrode capable of freely extending and retracting through the catheter; and an insulator extending a retracting together with the electrode relative to the catheter so that the insulator isolates not the distal end portion of the electrode but the rest of the electrode protruding from the catheter.
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