(EN) The invention relates to a bare stent compressible and stretchable in the axial direction. The bare stent is used in the aorta and provided with at least two layers of woven meshes, and is characterized in that the bare stent is provided with a non-sparse-mesh area and a sparse-mesh area; the non-sparse-mesh area is formed by overlapping and interweaving at least two kinds of first wires and second wires with different diameters, the first wires have the diameter of 20-150 microns, and the second wires have the diameter of 150-600 microns; the sparse-mesh area is only composed of the second wires and is arranged at the position, with a branch artery, in the corresponding treatment position after the bare stent is released; and in the natural release state, except the sparse-mesh area, the bare stent has the metal coverage rate of at least 60%. The present invention relates to the bare stent for the treatment of aortic aneurysms and/or aortic dissection lesions, in particular type A aortic dissection, which is axially stretchable and radially compressible in a released state to obtain a delivery configuration of suitable dimensions for performing a procedure using a delivery catheter conventionally delivered through the femoral artery.
(ZH) 本申请涉及一种沿轴向可压缩和拉伸的裸支架。所述裸支架用于主动脉中，具有至少两层编织网，其特征在于所述裸支架具有非疏网区和疏网区，所述非疏网区由至少两种不同直径的第一丝和第二丝通过搭接交织而成，其中第一丝具有20～150μm的直径，且第二丝具有150～600μm的直径，所述疏网区仅由所述第二丝构成，并布置在所述裸支架释放后对应治疗部位中具有分支动脉的部位，其中，在自然释放状态下，除所述疏网区外，所述裸支架具有至少60％的金属覆盖率。所述裸支架用于治疗主动脉瘤和/或主动脉夹层病变，特别是治疗A型主动脉夹层，在释放状态下可轴向拉伸并径向压缩获得具有合适尺寸的递送构型以便使用常规通过股动脉递送的递送导管实施手术。
