Expandable stents and method for making same
First Claim
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1. A longitudinally flexible stent, comprising:
- a plurality of interconnected cylindrical elements aligned along a stent longitudinal axis, each cylindrical element having a shape configured to enable the cylindrical element to expand with the inflation of an expandable member disposed therein;
wherein each of the cylindrical elements has a diameter and a length, the length of each cylindrical element being less than the diameter of the cylindrical element upon inflation of the expandable member; and
the cylindrical elements having a length less than 2.5 mm.
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Abstract
The invention is directed to an expandable stent for implantation in a body lumen, such as an artery, and a method for making it from a single length of tubing. The stent consists of a plurality of radially expandable cylindrical elements generally aligned on a common axis and interconnected by one or more interconnective elements. The individual radially expandable cylindrical elements consist of ribbon-like material disposed in an undulating pattern. Portions of the expanded stent project outwardly into engagement with the vessel wall to more securely attach the stent.
317 Citations
15 Claims
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1. A longitudinally flexible stent, comprising:
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a plurality of interconnected cylindrical elements aligned along a stent longitudinal axis, each cylindrical element having a shape configured to enable the cylindrical element to expand with the inflation of an expandable member disposed therein;
wherein each of the cylindrical elements has a diameter and a length, the length of each cylindrical element being less than the diameter of the cylindrical element upon inflation of the expandable member; and
the cylindrical elements having a length less than 2.5 mm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A balloon expandable longitudinally flexible stent, comprising:
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a stent pattern having a plurality of single undulating portions extending circumferentially about a longitudinal axis;
each single undulating portion being formed individually and thereafter being connected together along the longitudinal axis;
at least one of the single undulating portions having a length and a diameter, the length being less than the diameter upon inflation of the balloon;
the single undulating portions having a length less than 2.5 mm; and
wherein there is no appreciable shortening of the stent upon inflation of the balloon. - View Dependent Claims (13, 14)
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15. A longitudinally flexible stent, comprising:
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a stent pattern having a plurality of single undulating portions extending circumferentially about a longitudinal axis, the single undulating portions being connected together along the longitudinal axis;
the single undulating portions having a length less than 2.5 mm;
the plurality of single undulating portions having open ends and closed ends, at least one of the open ends being no wider than one of the closed ends when the stent is mounted on an expandable member before expansion.
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Specification