The present specification discloses an overtube device having a proximal end and an opposite distal end configured for selective attachment to an overtube, the overtube device comprising a body having a proximal opening formed at the proximal end and an opposite distal opening formed at the distal end, the proximal and distal openings being in fluid communication, a primary lumen formed within the body interconnecting the proximal and distal openings, the primary lumen being configured for selective receipt and passage therethrough of an endoscope, and a secondary lumen formed within the body so as to intersect and be in fluid communication with the primary lumen and thus the distal opening, the secondary lumen being configured for selective engagement with a suction system and thus defining a suction port, whereby with the distal end of the overtube device attached to the overtube and with the suction system engaged with the suction port of the overtube device, suction applied via the suction system through the suction port and thus the secondary and primary lumens formed within the body of the overtube device applies suction to the overtube.
