Patent ID: 8298185

Claim:
A cannula assembly, the assembly comprising: a body member including a proximal end, a distal end, and a lumen extending therebetween, the distal end including a plurality of outwardly-biased flexible fins extending therefrom, each fin capable of inward movement such that the fins converge, each fin further including a wall formed from an inner surface and an edge surface extending from the inner surface to an outer surface, and at least one longitudinal slot formed within the fin wall and extending to a surface; and a trocar device including a proximal end and a shaft extending therefrom to form a distal end, the shaft member including at least one raised member per fin slot, each raised member being radially disposed proximate the distal end, the shaft member capable of insertion into the lumen, wherein insertion of the shaft within the lumen engages the raised members with the fin slots causing inward movement of the fins.