Method of making a radially expandable prosthesis
First Claim
Patent Images
1. A method for making a radially expandable endoprosthesis, comprising the steps of:
- selecting a mandrel having a relatively small cross-sectional area in order to provide a narrow wrapping surface;
winding an elongated strand around said narrow wrapping surface and removing the strand from said small mandrel so as to form a wound strand having a plurality of turns therein, said turns being shaped to generally conform to the shape of said cross-sectional area;
subjecting said wound strand to flattening and twisting forces in order to form a generally uni-planar undulating strand length;
providing another mandrel having a cross-sectional area greater than that of said relatively small mandrel; and
generally helically wrapping said undulating strand length around said another mandrel and removing said another mandrel to thereby provide a radially expandable endoprosthesis.
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Abstract
Radially expandable endoprostheses or stents are provided, as well as their method of manufacture. These stents include a plurality of adjacent generally circumferential sections that are substantially axially positioned with respect to each other. At least one of the generally circumferential sections has a generally circumferentially disposed expandable segment that imparts circumferential and radial expandability to the stent.
572 Citations
16 Claims
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1. A method for making a radially expandable endoprosthesis, comprising the steps of:
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selecting a mandrel having a relatively small cross-sectional area in order to provide a narrow wrapping surface; winding an elongated strand around said narrow wrapping surface and removing the strand from said small mandrel so as to form a wound strand having a plurality of turns therein, said turns being shaped to generally conform to the shape of said cross-sectional area; subjecting said wound strand to flattening and twisting forces in order to form a generally uni-planar undulating strand length; providing another mandrel having a cross-sectional area greater than that of said relatively small mandrel; and generally helically wrapping said undulating strand length around said another mandrel and removing said another mandrel to thereby provide a radially expandable endoprosthesis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification