Luminal stenting

摘要

A stent delivery system, a core assembly, and methods of operating the same are provided. The delivery system can comprise a catheter and the core assembly. The core assembly can comprise a constraining member, protruding member, a core member, and a stent extending along the core member. The tubular constraining member can be spaced apart from the core member and define a capture area. The protruding member can be disposed along the core member at least partially distal of the capture area. The stent can have a first portion disposed within the capture area and a second portion, distal to the first portion, extending across or over an outer surface of the protruding member so that the protruding member and the constraining member cooperate to inhibit expansion of the first portion of the stent.

主权项

1. A method of operating a stent delivery system within a vessel of a patient, comprising:
positioning a catheter in the vessel, the catheter having a lumen defining an axis extending between a proximal end and a distal end, such that the catheter distal end is at a treatment site; positioning a core assembly within the catheter lumen, the core assembly having (i) an elongate member comprising a distal section, (ii) a stent having a distal portion and being carried along the elongate member, and (iii) a distal cover coupled to the member distal section and extending proximally, the core assembly being positioned within the lumen such that the elongate member distal section is positioned axially adjacent the catheter distal end with at least a portion of the distal cover extending in a space within the lumen radially between the elongate member distal section and the catheter distal end; distally advancing the core assembly relative to the catheter to permit expansion of the stent distal portion, the expansion urging the distal cover away from the elongate member; and proximally withdrawing the core assembly into the catheter such that the elongate member distal section is positioned axially adjacent to the catheter distal end with the distal cover positioned out of the space and extending distally.