BRANCH VESSEL PROSTHESIS WITH A ROLL-UP SEALING ASSEMBLY

摘要

A branch prosthesis (100) configured for placement in a branch vessel includes an expandable tubular body portion (102), an expandable annular flange (112) attached to a proximal end of the body portion, and a sealing sleeve (114) proximally extending from the annular flange. The sealing sleeve is adapted to deform to a generally straight cylindrical hollow shape during implantation. When deployed, the sealing sleeve rolls up to a tightly-wound coil that bears against the annular flange. When used in conjunction with a main prosthesis (160) having a side opening (100) and deployed within in a main vessel, the annular flange of the branch prosthesis engages an outer surface (170) of the main prosthesis around a perimeter of the side opening and the sealing sleeve engages an inner surface (168) of the main prosthesis around the perimeter of the side opening to form a fluid-tight seal between the main prosthesis and the branch prosthesis.