| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an endoluminal prosthesis to avoid problems and disadvantages of conventional technologies. <P>SOLUTION: This prosthesis is a bifurcated stent or a stent graft. The stent-graft construction may provide for at least two segments of the stent-graft to have different structural properties from each other. The structural properties may include flexibility and axial stiffness. With such a construction, it is possible to optimize the performance characteristics for ideal delivery and at the same time enhance the device's kink resistance, its ability to maintain its deployed position, and its conformability (which is helpful to effectuate required sealing against the blood vessel wall). In a preferred embodiment, the axial stiffness is varied according to the presence or absence of extended strut functional parts or the use of a tape member of varying thickness or width. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
