| 摘要 |
Disclosed is a tubular stent (1) having first and second ends (2,3) and a longitudinal axis (4) therebetween. The tubular stent is formed from a network of struts which defines a cylindrical surface about the longitudinal axis (4). The struts delineate a plurality of cells (see 23, 30, 31, 32, 33, figure 1) within the network. At least one cell in each row is a nodal cell (see 23, figure 1). The network of struts comprises a plurality of circumferential rings (6, 9, 13, 16, 17) (see also figure 5). Each ring extends perpendicularly to the longitudinal axis and the rings are located adjacent to each other parallel to the longitudinal axis to define the cylindrical surface. The circumferential rings are of a wave form. The circumferential rings comprise nodal circumferential rings (6), which define the at least one nodal cell (see 26, figure 1). Adjacent nodal circumferential rings are aligned such that the respective peaks and/or troughs of the nodal circumferential rings are aligned with each other. The circumferential rings further comprise distal circumferential rings (9, 13, 16, 17). Each distal circumferential ring has a wave form the alternates between a maximum amplitude peak and trough and a minimum amplitude peak and trough. At least some of the peaks of the wave form of a first distal circumferential ring (9) are aligned with at least some of the troughs of the wave form of a second circumferential ring (13). The peak-peak amplitude of the maximum amplitude peaks and troughs of the distal circumferential rings increases progressively from a distal circumferential ring relatively closer to the nodal circumferential ring to a distal circumferential ring relatively further from the nodal circumferential ring. |
