Devices and methods for in situ fenestration of a stent-graft at the site of a branch vessel

摘要

The present disclosure includes a stent-graft comprising a first portion that is configured to engage a vessel wall, a second portion that is configured not to engage the vessel wall, and a perfusion window that is configured to permit blood flow. The stent-graft may further comprise a transition portion between the first portion and the second portion, and the perfusion window may be formed in the first portion, the second portion, and/or the transition portion. In a variety of embodiments, one of the first and the second portion may have a smaller diameter than the other. Similarly, in a variety of embodiments, the transition portion may be frustoconically shaped.

主权项

1. A stent-graft comprising:
a stent-graft member including a stent and a graft, the graft defining a lumen for conveying blood flow, the stent-graft member including,
a first portion having a first diameter that is configured to engage a vessel wall of a vessel, the vessel wall defining a vessel lumen,a second portion having a second diameter that is smaller than the first diameter of the first portion,a transition portion that has an interior surface and extends between the first portion and the second portion, anda perfusion window formed in the transition portion and oriented to permit blood flow through the transition portion and parallel to a longitudinal axis of the stent-graft member after deployment of the stent graft member in the vessel; and an occluder free of any perfusion windows, such that the occluder has a continuous, impermeable wall, the occluder having generally the same shape as an interior surface of the transition portion and being inserted into the stent-graft member to block the perfusion window without blocking flow through the lumen of the stent-graft member.