| 摘要 |
A vascular prosthesis is disclosed, comprising a forked tube, having: an inflow tube with an inflow end (6); a primary distal outflow branch with a p rimary distal outflow end (8); and a secondary proximal outflow branch with a secondary proximal outflow end (7). The two outflow ends are directed in d ifferent directions and the two outflow branches in the vicinity of the bifu rcation (9) have different cross-sectional areas. Further, the secondary pro ximal outflow branch is more curved than the primary distal outflow branch, and the secondary proximal outflow branch in the vicinity of the bifurcation has a smaller cross-sectional area than the primary distal outflow branch. Hereby, energy losses at flow bifurcations is adapted to the bypass situatio n to even out the level of shear stress, thereby avoiding areas with low she ar stress and decreasing the tendency for turbulent flow, thus reducing the risk of graftstenosis. |
