Patent ID: 8808361

Claim:
An aneurysm bridging device for use in a bifurcation of a blood vessel, wherein the bifurcation comprises an inlet vessel with a first diameter, a first outlet vessel with a second diameter, and a second outlet vessel, said bridging device comprising: a substantially tubular wire-frame structure ( 1 ) characterized by a distal region ( 21 ), a central region ( 23 ) and a proximal region ( 22 ), said wire frame structure having small diameter configuration for delivery through a delivery catheter ( 2 ) and an expanded, large diameter configuration, said tubular wire-frame structure being superelastically biased to open to the expanded, large diameter configuration; wherein said distal region ( 21 ) and proximal region ( 22 ) establish a cylindrical structure with a first diameter, in the expanded, large diameter configuration, that matches or slightly exceeds the diameter of the blood vessel in which they are to be placed, and wherein the central region has a bulbous outline with a second diameter, in the expanded, large diameter configuration, which exceeds the first diameter of the distal region and proximal region; the proximal region comprising a first proximal zigzag segment ( 29 ), and the distal region comprising a first distal zigzag segment ( 25 ), and said central region comprising a first central zigzag segment ( 34 ), and a plurality of spirally oriented struts ( 39 , 42 ) joining the zigzag segment ( 34 ) of the central region ( 23 ) to the zigzag segments of the distal region and the proximal region ( 25 29 ).