Patent ID: 8348943
Filing Date: 2013-01-08
Classification: A61B

Abstract:
1. A high frequency treatment tool for an endoscope, comprising: a flexible insulating tube to be inserted into and pulled out of an accessory channel of the endoscope, the flexible insulating tube including a wire insertion channel and a water channel through which water is conveyed, the wire insertion channel and the water channel being separately formed in an axis line direction of the flexible insulating tube at a rear portion of the flexible insulating tube, to define a multi-lumen tube portion and the wire insertion channel and the water channel being integrated at a distal end portion of the flexible insulating tube to define a single-lumen tube portion having an elongate opening; a conductive wire configured to move back and forth in the axis line direction thereof through the wire insertion channel; an electrode configured to project and recede from the distal end portion of the flexible insulating tube; a regulator provided at the distal end portion of the flexible insulating tube, the regulator being configured to regulate movement of the electrode such that the electrode stably projects and recedes from the distal end of the flexible insulating tube; a nozzle formed at the distal end portion of the flexible insulating tube, the nozzle being configured to direct water conveyed through the water channel to the electrode, wherein the regulator is configured to regulate movement of the conductive wire such that the conductive wire is prevented from being positioned within the regulator, wherein at least a part of the nozzle is formed by the regulator, and the regulator including a penetrating hole configured to guide the electrode and prevent the conductive wire from being positioned within the regulator; and the regulator being formed so as to fill approximately two-thirds of the elongate opening, and the regulator being formed at distal end of the flexible insulating tube so as to define a water hole between an outer surface of the regulator and inner surface of the flexible insulating tube, the water hole being configured to convey water from within the flexible insulating tube, wherein the outer surface of the regulator is slanted towards a longitudinal axis of the electrode as the outer surface of the regulator extends towards a distal most end of the flexible insulating tube.