| 主权项 |
1. A balloon catheter comprising:
an outer conduit having an outer surface; an inner conduit having an outer surface, the inner conduit is suitable for passage over a guide wire, the inner conduit is movably disposed within a lumen of the outer conduit, wherein a distal tip of the inner conduit extends beyond a distal tip of the outer conduit at all times during operation of the catheter, and wherein the inner conduit is capable of being moved along its longitudinal axis in relation to the outer conduit; a balloon having a lumen, a proximal margin, and a distal margin, wherein the proximal margin of the balloon is attached to an outer surface of the distal tip of the outer conduit and the distal margin of the balloon is attached to an outer surface of the portion of the inner conduit that extends beyond the distal tip of the outer conduit, and wherein the distal and/or proximal end portion(s) of the balloon are capable of intussuscepting upon proximal movement of the inner conduit in relation to the outer conduit to form a cavity within the balloon, such that, after said intussuscepting, when the balloon is deflated, the cavity is enlarged trapping therewithin debris and/or particulate matter without need for application of externally applied suction; and a fluid port for introducing an expansion fluid into an annular space formed between the inner surface of the outer conduit and the outer surface of the inner conduit and therefrom into the lumen of the balloon, and for the removal of the expansion fluid. |
