Patent ID: 8932323
Filing Date: 2015-01-13
Classification: A61B

Abstract:
1. A treatment tool for an endoscope, comprising: a treatment tool insertion portion to be inserted into a channel of the endoscope; an open/close member support portion which is provided on a distal end of the treatment tool insertion portion; a liquid conduit configured to transport a liquid to the open/close member support portion, an inside of the treatment tool insertion portion being the liquid conduit; an open/close member located in front of the liquid conduit and being supported on the open/close member support portion via a pin, the open/close member opening and closing by rotating around the pin and treating a target site; and a transmission member configured to transmit a driving force from a proximal end side to the open/close member, wherein the open/close member support portion comprises: the liquid transport lumen is located at a lateral side of the open/close member support portion in a radial direction, the transmission member extends from the proximal end side to the open/close member through the liquid conduit and through the one or more through-holes, and the transmission member is exposed to the outside of the liquid conduit distally from the one or more through-holes and is connected to the open/close member, and a cross-section area of the liquid transport lumen is larger than a clearance area formed between an inner surface of the one or more through-holes and an outer surface of the transmission member in a state where the transmission member is disposed in the one or more through-holes.