Patent ID: 7909799

Claim:
Apparatus for directing radioactive material to a target site within a body said apparatus comprising: a flexible tube having a distal end and a proximal end, a longitudinal axis extending between said distal end and said proximal end, and a lumen extending from the distal end to the proximal end; visualization apparatus disposed within the lumen of the flexible tube for visualizing structures disposed adjacent to the distal end of the tube; radioactive material carried by the flexible tube; an external thread disposed over said distal end of said tube, said external thread having a sufficient structural integrity, and a sufficient surface profile, such that when said tube is disposed in a bodily passageway, rotation of said tube about said longitudinal axis will result in longitudinal motion of said tube along said bodily passageway; and a rotatable coupling attached to the flexible tube and the visualization apparatus such that the flexible tube may rotate freely about the longitudinal axis while the visualization apparatus remains rotationally fixed within the tube.