Percutaneous transluminal stent delivery system, has distal tip zone which is contiguous with distal end of tube, in which tip zone both luminal surface and abluminal surface taper radially inwardly nearer to distal end of tube

摘要

The system comprises a tube, luminal surface and an abluminal surface, the tube defining a lumen which extends the full length of the tube. The system further comprises a device to advance a self-expanding stent constrained from radially-outward expansion by the tube wall all the way from the proximal end of the tube to a distal end zone of the tube. The system has a distal tip zone which is contiguous with the distal end of the tube, in which tip zone both the luminal surface and the abluminal surface taper radially inwardly with increasing nearness to the distal end of the tube, at least when the distal tip zone is at 37 deg C and free from externally imposed hoop stresses.