Expandable stents and method for making same
First Claim
1. A method for implanting a stent in a body lumen, the stent having a plurality of cylindrical elements which are expandable in the radial direction and which are interconnected so as to be generally aligned on a common longitudinal axis, the cylindrical elements forming an outer wall surface, the stent being adapted for mounting on a catheter for intraluminal delivery, the method comprising the steps of:
- mounting the stent on a distal end of the catheter for intraluminal delivery through a body lumen;
advancing the catheter and stent through the body lumen;
implanting the stent in the body lumen by expanding the stent from a first delivery diameter, which is smaller than the inside diameter of the body lumen, to a second implanted diameter in which the stent embeds in the body lumen;
forming a plurality of outwardly projecting edges on the outer wall surface of the cylindrical elements of the stent as the stent expands from the first delivery diameter to the second implanted diameter;
embedding the outwardly projecting edges in the body lumen to firmly attach the stent; and
withdrawing the catheter from the body lumen leaving the stent firmly implanted in the body lumen.
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Accused Products
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.
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Citations
7 Claims
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1. A method for implanting a stent in a body lumen, the stent having a plurality of cylindrical elements which are expandable in the radial direction and which are interconnected so as to be generally aligned on a common longitudinal axis, the cylindrical elements forming an outer wall surface, the stent being adapted for mounting on a catheter for intraluminal delivery, the method comprising the steps of:
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mounting the stent on a distal end of the catheter for intraluminal delivery through a body lumen; advancing the catheter and stent through the body lumen; implanting the stent in the body lumen by expanding the stent from a first delivery diameter, which is smaller than the inside diameter of the body lumen, to a second implanted diameter in which the stent embeds in the body lumen; forming a plurality of outwardly projecting edges on the outer wall surface of the cylindrical elements of the stent as the stent expands from the first delivery diameter to the second implanted diameter; embedding the outwardly projecting edges in the body lumen to firmly attach the stent; and withdrawing the catheter from the body lumen leaving the stent firmly implanted in the body lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification