Guide tube unit for endoscope and method for resecting a tissue

摘要

An endoscope guide tube unit of the present invention comprises an outer sheath inserted into a body cavity of a human subject, an inner sheath arranged inside the outer sheath and a scope fixing tool provided on a proximal-end side. In the endoscope guide tube unit, an opening treatment window is provided as a side opening in a side wall area of the outer sheath near its distal end. The inner sheath is inserted to a position where the treatment window faces an affected region in the body cavity of a human being. It is possible to block the treatment window in the outer sheath. The affected region is treated via the treatment window opened in the outer sheath.