Ring on a closed web stent-graft for use in tip capture

摘要

A stent-graft has a closed web end configuration in which endmost stent crowns do not extend beyond an end or edge of a tubular graft. In order to couple the stent-graft to tip capture fingers or prongs of a delivery system, the stent-graft includes a ring woven between the endmost crowns of an end stent. When end stent is in a compressed delivery configuration, sections of the ring between adjacent endmost crowns form attachment loops that longitudinally extend beyond the end of the tubular graft for engaging the tip capture fingers of a delivery system. When the end stent is in an expanded fully deployed configuration, the attachment loops retract back to the stent so that the ring is a circular band having a diameter substantially equal to the expanded diameter of the stent.

主权项

1. A prosthesis for implantation within a body lumen, the prosthesis being configured for delivery via a catheter having a tip capture mechanism at a distal end thereof, the tip capture mechanism including at least one tip capture finger, the prosthesis comprising:
a tubular graft of a graft material; a stent coupled to the tubular graft and including a plurality of crowns and a plurality of struts with each crown being formed between a pair of opposing struts, the stent having endmost crowns that are adjacent to and distal of a proximal edge of the tubular graft, wherein the endmost crowns are covered by the graft material of the tubular graft; and a ring that engages each of the endmost crowns of the stent with sections of the ring being defined between adjacent endmost crowns, wherein at least one of the sections of the ring longitudinally extends beyond the proximal edge of the tubular graft as an attachment loop of the prosthesis that is configured to engage the at least one tip capture finger of the catheter when the stent is in a compressed delivery configuration and wherein the ring is a circular band when the stent is in an expanded deployed configuration.