Intravascular stent having high fatigue performance
AssigneeAbbott Cardiovascular Systems Inc.
InventorsDiem Uyen Ta, Senthil K. Eswaran, Nianjiong Joan Bei
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Abstract
This 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 links. A Y-shaped member is comprised of a U-shaped member and a link having a curved portion and a straight portion to improve the flexibility and thereby improve the fatigue performance of the Y-link junction.
Claims21
-9. (canceled)
A stent for implanting in a body lumen, comprising:
- a plurality of cylindrical rings, each of the cylindrical rings being generally independently expandable in the radial direction and generally aligned on a common longitudinal axis;
- each of the cylindrical rings having an undulating pattern of peaks and valleys forming Y-shaped members, U-shaped members, and W-shaped members;
- each of the cylindrical rings being interconnected by links to one of the adjacent cylindrical rings so that the cylindrical rings form a longitudinally flexible stent;
- and
- each of the links having a straight section and a curved section, the curved section having a first curved length and a second curved length and wherein the first curved length is in a range from 0.035 inch (0.89 mm) to 0.028 inch (0.71 mm).
A stent for implanting in a body lumen, comprising:
- a plurality of cylindrical rings, each of the cylindrical rings being generally independently expandable in the radial direction and generally aligned on a common longitudinal axis;
- each of the cylindrical rings having an undulating pattern of peaks and valleys forming Y-shaped members, U-shaped members, and W-shaped members;
- each of the cylindrical rings being interconnected by links to one of the adjacent cylindrical rings so that the cylindrical rings form a longitudinally flexible stent;
- and
- each of the links having a straight section and a curved section, the curved section having a first curved length and a second curved length and wherein the second curved length is in a range from 0.027 inch (0.69 mm) to 0.018 inch (0.46 mm).
A stent for implanting in a body lumen, comprising:
- a plurality of cylindrical rings, each of the cylindrical rings being generally independently expandable in the radial direction and generally aligned on a common longitudinal axis;
- each of the cylindrical rings having an undulating pattern of peaks and valleys forming Y-shaped members, U-shaped members, and W-shaped members;
- each of the cylindrical rings being interconnected by links to one of the adjacent cylindrical rings so that the cylindrical rings form a longitudinally flexible stent;
- and
- each of the links having a straight section and a curved section, the curved section having a first curved length and a second curved length and wherein the first curved length is in a range from 0.035 inch (0.89 mm) to 0.028 inch (0.71 mm), and the second curved length is in a range from 0.027 inch (0.69 mm) to 0.018 inch (0.46 mm).
Dependencies are inferred from the claim text.