Prosthetic repair of body passages

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A method comprising:

• folding an annular resilient element along a diametric axis into a C-shaped configuration, said element attached to a graft;
• and
• positioning said graft within a first blood vessel to extend along a length of said first blood vessel, a part of said positioned graft to extend past a point of an intersection of said first blood vessel and a second blood vessel so as not to occlude an opening to permit communication of said intersection, said element to contact said first blood vessel while in said C-shaped configuration.

A method comprising:

• attaching an annular resilient element to a graft;
• and
• positioning said graft within a first blood vessel that is intersected by a second blood vessel, a part of said positioned graft to extend past the intersection of said first blood vessel and said second blood vessel so as not to occlude an opening to permit communication of said intersection, said positioned graft and said positioned annular element to contact said first blood vessel on both sides of the intersection.