| 摘要 |
A stent includes marker sections ( 5 ) having thicknesses greater than that of the remainder of the stent so that the marker sections ( 5 ) become radiopaque and visible to a surgeon deploying the stent in use. The stent is formed by producing apertures in a hollow tube such that the tube becomes a series of interconnecting struts defining the apertures ( 2 ), with the marker sections ( 5 ) formed by folding at least one portion of the wall to provide a region of increased thickness. The marker sections ( 5 ) may be formed at the ends of the stent and/or at an intermediate area of the stent away from the ends. The marker sections may be formed by folding the at least one portion of the wall to the extent that the original outer surface of the portion is adjacent to the outer surface of the wall such that a two laywer region of wall is provided as a marker section ( 5 ). The marker sections ( 5 ) may be formed by folding the at least one portion of the wall into three layers. The folded portions of the marker sections may also be secured by welds.
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