Expandable stents and method for making same
AssigneeAdvanced Cardiovascular Systems, Inc.
InventorsLilip Lau, William M. Hartigan, John J. Frantzen
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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 dtent.
Claims13
An intravascular stent for expanding and implanting in a body lumen, comprising:
- a plurality of spaced apart cylindrical rings positioned along a longitudinal axis, each of the cylindrical rings having a plurality of undulating elements in the form of a repeating pattern of substantially U-shaped members;
- and
- a plurality of connecting members for connecting adjacent cylindrical rings;
- and
- the cylindrical rings being positioned relative to each other so that the substantially U-shaped members of adjacent cylindrical rings are out of phase;
- the cylindrical rings having a delivery diameter and an implanted diameter so that as the cylindrical rings are expanded from the delivery diameter to the implanted diameter at lest some of the substantially U-shaped members project radially outwardly.
An intravascular stent for expanding and implanting in a body lumen, comprising:
- a plurality of spaced-apart cylindrical rings positioned along a longitudinal axis, each of the cylindrical rings having a plurality of undulating elements in the form of a repeating pattern of substantially U-shaped members;
- each of the substantially U-shaped members having a pair of sides connected by a curved portion;
- a plurality of struts for connecting adjacent cylindrical rings;
- and
- the cylindrical rings being positioned relative to each other so that the substantially U-shaped members of adjacent cylindrical rings are out of phase;
- the cylindrical rings having a delivery diameter and an implanted diameter so that as the cylindrical rings are expanded from the delivery diameter to the implanted diameter at lest some of the substantially U-shaped members project radially outwardly.
Dependencies are inferred from the claim text.