Stent/graft assembly
View Patent ↗A stent/graft assembly includes a tubular graft connected in substantially end-to-end relationship with a generally tubular stent. Free ends of the stent and graft extend in opposite directions from the end-to-end connection during a pre-deployment orientation of the assembly. However, the graft is inverted during deployment so that free ends of the graft and the stent extend in substantially the same direction from the end-to-end connection in a post-deployment orientation. Thus, at least a portion of the stent is disposed within at least a portion of the graft in a post-deployment orientation of the assembly.
1. An endovascular stent/graft assembly for repairing a damaged section of a blood vessel, said blood vessel having a first relatively healthy section upstream of and adjacent to the damaged section of the blood vessel and second and third relatively healthy sections branched from one another and downstream of the damaged section of the blood vessel, said assembly, prior to insertion into the blood vessel, comprising:
a substantially tubular stent means for directly contacting said first relatively healthy section of said blood vessel, said stent means being substantially tubular and having opposite upstream and downstream axial ends;
a substantially tubular graft means having an upstream end section for directly contacting the first relatively healthy section of the blood vessel, said graft means further having a downstream end section having at least two branches disposed for contacting the second and third relatively healthy sections of said blood vessel downstream of the damaged section of the blood vessel, such that portions of said graft means between said upstream and said downstream ends bridge said damaged section of said blood vessel, said upstream end of the graft means being fixedly disposed with respect to the downstream axial end of the stent means in a substantially end-to-end connection without overlap;
hooks fixedly connected with the downstream end of the stent means and extending at least to the upstream end of the graft means;
a ring means fixedly attached to the tubular graft means in proximity to the upstream end of the substantially tubular graft means, the ring means further being connected to the hooks for maintaining the stent means and the graft means in said substantially end-to-end connection so that the upstream end of the graft means and the downstream end of the stent means are substantially contiguous while defining a small axial space therebetween, and
wherein the graft means has a smaller cross-section than a connection with overlap of the stent means and the graft means so that the endovascular stent/graft assembly can be introduced more easily into the blood vessel.
2. The endovascular stent/graft assembly of claim 1 , further comprising at least one wire in the tubular graft means and extending substantially from the stent means to the downstream end of the graft means, whereby the at least one resists radial collapsing of the graft means.