Patent ID: 6988987

Claim:
A flexible guide tube to guide an endoscope or a therapeutic device into a body cavity through the mouth, the guide tube comprising: an insertion section which can be inserted into a body through the mouth, the insertion section having a distal end arranged in the body and at least one lumen, through which the endoscope or therapeutic device can be inserted; a proximal end which is connected to the insertion section and is arranged on the outside of the body; a shaft which is arranged in the vicinity of the distal end in the direction perpendicular to the direction in which the longitudinal axis of the insertion section extends; a curved needle which is rotatably attached to the shaft and which has an engaging portion capable of engaging a suture therewith; and driving force transmitting member which has one end connected to the curved needle and the other end arranged at the proximal end, wherein the distal end is capable of being fixed to a required portion in the body cavity to suture tissue by operating the driving force transmitting member on the outside of the body.