| 摘要 |
A radially expandable surgical stent is provided with a helical element 20 extending from a first end 12 of the stent 10 to a second end 14 of the stent 10 with a series of turns 26. Each turn 26 of the helical element 20 includes bends 30, 32, 34 therein which can have their radius of curvature 35 increased to expand the stent 10 radially. The stent 10 resists an accordion effect caused when axial contracting forces are applied to the stent, by having axial elements 50 between turns 26 in the helical element 20. The axial elements 50 span gaps 44 between adjacent turns 26 and maintain a spacing between the turns 26.
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