| 摘要 |
To provide a lumen-friendly, flexible stent which is excellent in trackability to lumens (thus, it is able to pass through the three-dimensionally meandering lumens), substantially free from shortening (shortening of the length), uniformly expandable. A stent according to the present invention comprises radially expandable annular members ( 1 ) which are aligned in a longitudinal direction of the stent, and one or more coupling elements ( 2 ) that couple adjoining two annular members ( 1 ) in the longitudinal direction of the stent, wherein said annular member comprises first annular member elements ( 11 ) and second annular member elements ( 12 ), which have a plane symmetrical pattern and are alternately connected in the circumferential direction of the annular member, and wherein under the condition that the stent is unfolded onto a plane, the first annular member element ( 11 ) includes one wave mountain, while the second annular member element ( 12 ) includes one wave trough, the adjoining two annular members being connected between the junctions which connect the first annular member elements ( 11 ) and second annular member elements ( 12 ) of the respective annular members.
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