| CPC A61F 2/82 (2013.01) [A61F 2002/823 (2013.01); A61F 2220/0025 (2013.01); A61F 2220/0083 (2013.01)] | 15 Claims |
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1. A luminal stent, comprising:
a tubular body and a skirt sleeved on the tubular body, one end of the skirt is a fixed end sealedly connected with an outer surface of the tubular body, another end of the skirt is a free end, the free end of the skirt is radiated outwards, so that diameters of cross section of the skirt gradually increase along a central axis of the tubular body and along a direction from the fixed end to the free end,
wherein connection points between the fixed end and the outer surface of the tubular body define a first continuous ring, and outermost points of the free end define a second continuous ring,
wherein in a cross-sectional plane passing through the central axis of the tubular body, a distance between a first connection point of the fixed end on the first continuous ring and on the cross-sectional plane and a first outermost point of the free end on the second continuous ring and on the cross-sectional plane is defined as a first distance, the ratio of the first distance to a diameter of the second continuous ring is less than 1/2 when the luminal stent is in an unstressed configuration;
wherein the tubular body comprises a first radial support structure, the skirt comprises a second radial support structure, and the second radial support structure is pivotally connected to the first radial support structure through a connection ring which is formed by winding a flexible wire or a metal ring, or by hooking the first radial support structure with the second radial support structure;
wherein the second radial support structure comprises at least one waveform ring having a plurality of proximal vertices, a plurality of distal vertices and a plurality of supports connecting the adjacent proximal vertex and the distal vertex, the at least one waveform ring is pivotally connected with the first radial support structure at a position of at least one of the proximal vertices; and
wherein an included angle between supports connected on both sides of the proximal vertices of the second radial support structure is greater than an included angle of the supports connected on both sides of the distal vertices of the second radial support structure.
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