Patent ID: 8372071
Filing Date: 2013-02-12
Classification: A61B

Abstract:
1. A high-frequency treatment tool comprising: a flexible sheath that can be inserted into a treatment tool insertion channel of an endoscope; a treatment tool body that is provided inside the flexible sheath, the treatment tool body comprising a flexible cord and a high-frequency knife to which a high-frequency current is applied, the high-frequency knife being formed at a front-end of the flexible cord; and a hard cylinder having an electrical insulating property, the hard cylinder being inserted and fixed inside the flexible sheath so that a front-end face of the hard cylinder forms almost the same plane as a front-end face of the flexible sheath, wherein the high-frequency knife comprises a plurality of blade portions radially provided at predetermined positions in an axial direction of the high-frequency knife, each of the plurality of blade portions including an engaging part, and wherein, when a part of the high-frequency knife protrudes from the hard cylinder, the engaging parts of the plurality of blade portions abut against a rear end portion of the hard cylinder so that: the high-frequency knife is engaged with the hard cylinder; and adjacent communicating channels are formed between the plurality of blade portions, through which liquid flows.