Delivery system having stent locking structure

摘要

A drainage stent delivery system including an elongate shaft of a medial device, a drainage catheter or stent, and a locking mechanism for selectively coupling the drainage stent to the elongate shaft. The drainage stent is selectively coupled to a distal portion of the elongate shaft such that the proximal end of the stent is positioned proximal of the distal end of the elongate shaft. The locking mechanism includes an engaging feature of the elongate shaft which engages a portion of the stent such that the stent may be selectively coupled to the elongate shaft through rotational motion of the elongate shaft relative to the stent. In some instances, the engaging feature of the elongate shaft may be a tab which extends into an opening of the stent.

主权项

1. A drainage stent delivery system comprising:
a non-expandable drainage stent including a tubular member having a proximal end, a distal end, and a lumen defined by an interior surface of the drainage stent; and an elongate shaft extending distally from a handle assembly to a location distal of the proximal end of the drainage stent, the elongate shaft having a longitudinal axis, a distal portion of the elongate shaft extending into the lumen of the drainage stent and including a tab fixed to and extending radially outward from an outer surface of the distal portion of the elongate shaft beyond the interior surface of the drainage stent, the tab being configured for engagement with the drainage stent through rotational motion of the elongate shaft relative to the drainage stent about the longitudinal axis of the elongate shaft to selectively couple the drainage stent to the elongate shaft.