Patent ID: 11890182

Abstract:
A coated stent (100,200,300,400), comprises a coated unit (110,210,310,410), and an exposed unit (120,220,320,420) which is a ring-shaped structure and which is provided on the periphery (113,213,313) of an end portion (112,212,312) of the coated unit (110,210,310,410); the exposed unit (120,220,320,420) comprises an inward-tilting wave body (122,222,322,422), the inward-tilting wave body (122,222,322,422) comprising at least a first wave crest (122a,222a,322a) and a first wave rod (122c) connected to the first wave crest (122a,222a,322a); the position of the first wave crest (122a.222a,322a) is farther away from the coated unit (110,210,310,410) than other positions on the inward-tilting wave body (122,222,322,422); the first wave rod (122c) is planar, and from the first wave crest (122a,222a,322a) to an end of the exposed unit (120,220,320,420) near the coated unit (110,210,310,410), the radial distance from the inward-tilting wave body (122,222,322,422) to the central axis (102,202,302,402) of the coated unit (110,210,310,410) gradually increases. When the coated stent (100,200,300,400) is implanted into an arterial vessel (10), the inward-tilting wave body (122,222,322,422) forms a certain avoidance space due to the tilt to adapt to the curvature of a large curved side (11) of the arterial vessel (10), and prevents the inward-tilting wave body (122,222,322,422) from directly piercing a branch vessel (20).