Devices and methods for performing water-aided endoscopy

An endoscopic plug, comprising:

• an external housing disposed external to a body cavity opening, the external housing including:
• a sealed opening at a proximal end of the external housing for insertion of one or more tools into a primary channel disposed therein;
• a port connector extending outward from a side opening at the proximal end of the external housing;
• a pair of support tabs disposed on an external surface of the external housing and extending radially outward from the sealed opening in opposite directions, wherein the pair of support tabs are distal to the port connector, and wherein the pair of support tabs are shaped to fit against an intergluteal cleft of the body cavity opening;
• an internal housing disposed within a body cavity and connected with the external housing such that the primary channel continues through the internal housing to a distal opening for insertion of the one or more tools into the body cavity;
• wherein the internal housing includes an expandable balloon disposed around an outer surface of the internal housing;
• and
• wherein the internal housing includes a secondary channel disposed within a housing wall for passage of air from an external source to the expandable balloon.