Provided is an alimentary engagement device that may be used for certain medical procedures such as colonoscopies and endoscopies. The alimentary engagement device includes a conduit that is fitted over a medical instrument such as a colonoscope or an endoscope as it is inserted within a body cavity. On the outer surface of the conduit is a balloon which may be expanded to engage the walls within the interior of the cavity. The interior of the conduit includes a seal which has an aperture for allowing a medical instrument to pass through.
