申请人:Frid, Noureddine
公开号:EP2987463A1
公开(公告)日:2016-02-24
Implantable endoluminal prosthesis (1) consisting of a braided framework (20) defining a cylindrical lumen (21) devoid of impermeable membrane, said braided framework (20) being self-expandable, comprising a plurality of layers (22, 23, 24) of wires (25) made of biocompatible material, each layer forming a mesh, the meshes forming a lattice with a plurality of wires (2) of given layers (22, 23, 24), the lattice defining polygonal opening units (26) when observed normal to a wall of the implantable endoluminal prosthesis (1), the diameter (Ø25) of wire (25) being at least 50 µm and at most 150 µm, the maximal diameter (Ø27) of the inscribed circle (27) of the polygonal opening units (26) being at least 75 µm and at most 200 µm in fully expanded state, wherein :
• The braided framework (20) consists of at least 128 and at most 512 wires (25);
• the ratio (T1/Ø25) of the thickness (T1) of a wall of said implantable endoluminal prosthesis (1) to the diameter (Ø25) of wire (25) is at least 5.5;
• in a fully expanded state, the surface coverage ratio (SCR) of said braided framework (20) is more than 50% and less than 90%;
• when the implantable endoluminal prosthesis (1) is deployed in a curved lumen having a H/W ratio between 0.5 and 0.9, the maximal diameter (Ø27) of inscribed circle of opening units is at least 75 µm and at most 200 µm, the length-related compression ratio (LCR) being between 15% and 40%, and the surface coverage ratio (SCR) of the braided framework (20) being more than 50% at the side of outer curve.
可植入的腔内假体(1)由一个编织框架(20)组成,该框架限定了一个没有防渗膜的圆柱形腔体(21),所述编织框架(20)可自动展开,包括多层(22、23、24)由生物相容性材料制成的导线(25),每层形成一个网孔,这些网孔与给定层(22、23、24)的多根导线(2)形成一个晶格,当观察到可植入的腔内假体(1)壁的法线方向时,晶格限定了多边形开口单元(26),导线(25)的直径(Ø25)与给定层(22、23、24)的导线(2)的直径(Ø25)相同、23、24),当与可植入腔内假体(1)的壁法线观察时,网格限定多边形开口单元(26),金属丝(25)的直径(Ø25)至少为 50 µm,最多为 150 µm,多边形开口单元(26)的内切圆(27)的最大直径(Ø27)在完全展开状态下至少为 75 µm,最多为 200 µm,其中 :
- 编织框架(20)由至少 128 根、最多 512 根导线(25)组成;
- 所述植入式腔内假体(1)的壁厚(T1)与导线(25)的直径(Ø25)之比(T1/Ø25)至少为 5.5;
- 在完全膨胀状态下,所述编织框架(20)的表面覆盖率(SCR)大于 50%,小于 90%;
- 当植入式腔内假体(1)在高/宽比介于 0.5 和 0.9 之间的弯曲管腔中使用时,开口单元内切圆的最大直径(Ø27)至少为 75 µm,最多为 200 µm,长度相关压缩比(LCR)介于 15%和 40%之间,编织框架(20)的表面覆盖率(SCR)在外曲线一侧大于 50%。