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发明授权
CN107205811B 自弯曲的支架移植物 有权

自弯曲的支架移植物
摘要：
本发明提供一种血管内自弯曲的支架移植物(20)，所述支架移植物(20)包括一自弯曲纵向部分(22)，当所述支架移植物(20)于一径向扩张状态下不受限制时，所述自弯曲纵向部分(22)被弯曲，用以限定一最内曲线(26)及一最外曲线(28)。所述支架移植物(20)包括数个环周撑杆件(30)；一压缩生成弹簧(40)，其中(a)在所述支架移植物(20)为一径向压缩状态下，所述压缩生成弹簧(40)为一细长的配置，及(b)所述压缩生成弹簧(40)与所述多个环周撑杆件(30)中的至少两个各别的一第一部分(44)重迭；及一抗弯曲弹簧(50)，与所述环周撑杆件(30)中的至少两个各别的一第二部分(54)重迭。当所述支架移植物(20)于所述径向扩张状态下不受限制时，所述抗弯曲弹簧(50)与所述压缩生成弹簧(40)被共同配置，用以弯曲所述自弯曲纵向部分(22)，使得所述自弯曲纵向部分(22)沿着所述最内曲线(26)被测量的一较小长度小于所述自弯曲纵向部分(22)沿着所述最外曲线(28)被测量的一较大长度的80％。
摘要（英）：

An endovascular self-curving stent-graft (20) includes a self-curving longitudinal portion (22), which is curved so as to define an innermost curve (26) and an outermost curve (28), when the stent-graft (20) is unconstrained in a radially-expanded state. The stent-graft (20) includes a plurality of circumferential strut members (30); a compression-generation spring (40), which (a) is in an elongated configuration when the stent-graft (20) is in a radially-compressed state, and (b) overlaps respective first portions (44) of at least two of the circumferential strut members (30); and an anti-buckling spring (50), which overlaps respective second portions (54) of at least two of the circumferential strut members (30). The anti-buckling spring (50) and the compression-generation spring (40) are together configured to curve the self-curving longitudinal portion (22) when the stent-graft (20) is unconstrained in the radially-expanded state, such that a lesser length of the self-curving longitudinal portion (22), measured along the innermost curve (26), is less than 80% of a greater length of the self-curving longitudinal portion (22), measured along the outermost curve (28).

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