A method for visualizing the interior of a bodily passageway comprising providing a system comprising a plurality of concentric telescoping shafts; visualization apparatus disposed within the telescoping shafts; and a helical thread disposed on the exterior of the telescoping shafts, the helical threads having a sufficient structural integrity and surface profile such that when the telescoping shafts are disposed in the passageway, rotation of the telescoping shafts induces a relative movement between the telescoping shafts and the passageway; wherein the telescoping shafts are configured to be selectively coupled together and de-coupled from one another; inserting the system into the passageway; rotating the telescoping shafts so as to draw the passageway onto the telescoping shafts in a pleating fashion; de-coupling the telescoping shafts; rotating the innermost telescoping shaft so as to draw the passageway onto the innermost telescoping shaft in a pleating fashion; and visualizing the interior of the passageway.