Abstract: A catheter adapted for performing a task at a location inside a lumen, the catheter comprising: a) an outer sheath; b) a balloon capable of inflating inside the lumen when the catheter reaches the location; and c) a balloon inflation tube, which is attached to the balloon and carries a fluid which causes the inflating of the balloon, said balloon inflation tube running through the outer sheath, movable relative to the outer sheath, and stiff enough so that it can be used to push and pull the balloon relative to the outer sheath.
Abstract: A catheter drive system, comprising: an inner tube adapted for inserting into a human body; an outer tube configured to slidably and snugly engage said inner tube, outside of a human body; and a pushing mechanism adapted to apply a pushing force to said inner tube less than 100 mm from an end thereof, such that said inner tube can extend at least 200 mm.