Stent-graft delivery system having a rotatable single shaft tip capture mechanism

摘要

A stent-graft delivery system includes an elongate shaft, a tip capture spindle disposed over the shaft, and a distal tip assembly coupled to the distal end of the shaft. At least one component of the delivery system constrains a stent of the stent-graft engaged with the tip capture spindle during delivery and partial-deployment of the stent-graft, and the at least one component is in a threaded relationship with the distal tip assembly. To fully deploy the stent-graft, the elongate shaft, having the distal tip assembly coupled thereto, is rotated to result in longitudinal movement of the at least one component and thereby release the stent from the tip capture spindle. The at least one component that longitudinally moves to fully deploy the stent-graft may be the tip capture spindle and/or a relatively short sleeve that extends over the tip capture spindle to the distal tip assembly.

主权项

1. A stent-graft delivery system comprising:
an elongate shaft with a distal end for insertion into a vasculature of a patient; a tip capture spindle disposed over the elongate shaft, proximate to the distal end of the elongate shaft, wherein a proximal portion of the tip capture spindle includes a plurality of retainer elements configured to engage a stent of a stent-graft prosthesis and a distal portion of the tip capture spindle includes threads on an outer surface thereof; and a distal tip assembly coupled to the distal end of the elongate shaft, wherein a portion of the distal tip assembly proximally extends over the outer surface of the distal portion of the tip capture spindle and an inner surface of the distal tip assembly includes threads that mate with the threads on the tip capture spindle, and wherein rotation of the elongate shaft rotates the distal tip assembly and results in longitudinal movement of the tip capture spindle.