Patent ID: 7959610

Claim:
A medical device insertion apparatus, comprising: an overtube having at least one opening through a wall of the overtube, wherein the overtube comprises a retention portion disposed at a distal end of the overtube, wherein the retention portion is adjustable between a first position of radial contraction and a second position of radial expansion, and wherein the retention portion includes at least one wing; a tube slideably disposed within the overtube, the tube comprising a first sheath and a second sheath, the second sheath having at least one wing disposed adjacent a distal end of the tube, the at least one wing of the second sheath adjustable between a first position of radial contraction and a second position of radial expansion; and a trocar slideably disposed within the tube; wherein the overtube is adapted for insertion through a body wall and the at least one wing of the second sheath in the second position is receivable within the at least one opening of the overtube.