A surgical access device includes a body having a first member and a secondmemberrelatively movable between open and closed configurations. Each member ispositionable withinan opening in tissue to provide access to an interior space of a patient. Eachmember includes atop surface, a bottom surface, a leading end, and a trailing end. The topsurfaces are positionedin close cooperative alignment when the first and second members are in theclosedconfiguration. The trailing ends are positioned in close cooperative alignmentwhen the first andsecond members are in the open configuration. In the open position, the firstand secondmembers define a passage therethrough to permit access to the interior spacefor passage of asurgical instrument therethrough.
