Patent ID: 8425602

Claim:
A curvilinear access device having an expandable working portal comprising: a slide having a channel with an open top; and a movable top sized to cover the open top of the channel forming the expandable working portal with a proximal end and a distal end; wherein the movable top is movable between a closed position and an open position, wherein in the closed position the movable top blocks direct visualization between the proximal end and the distal end of the expandable working portal, and in the open position the movement of the movable top results in direct visualization from the proximal end to the distal end of the expandable working portal; wherein the movable top includes a proximal end and distal end, the proximal end being pivotally secured near the proximal end of the working portal and the distal end being pivotally secured near the distal end of the working portal.