| 摘要 |
<p>A stent (11) or other endoprosthesis is provided from a single strand of biocompatible and resilient material into which spring coils (13) are formed by winding the strand through in excess of 360 DEG . The thus-formed coil springs are positioned along outside edges of the endoprosthesis, with legs (12) joining the coil springs in order to form a generally zig-zag structure. When the endoprosthesis is compressed for endoluminal delivery, the coil springs allow for large angular deflection between adjoining legs while avoiding plastic deformation of the coil or of the legs. The legs can be of the same length (12) to form a right cylindrical stent configuration; or have differing lengths (22,23) in a helical winding arrangement, resulting in the stent taking on a generally helical configuration in forming an overall cylindrical device.</p> |
