Flexible medical stent
First Claim
Patent Images
1. A medical device comprising:
- a catheter and a radially expandable stent mounted on the catheter, the stent comprising a hollow, cylindrical body comprising first and second rings extending circumferentially around the cylindrical body, each ring comprising an undulating series of peaks and valleys formed by struts connecting alternating curved peak and valley segments within the ring, the struts comprising a first curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within a ring form a nested chevron pattern; and
at least one longitudinal connection between the first and second rings.
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Accused Products
Abstract
The present invention is directed to a radially expandable medical stent having a chevron or “maple leaf” design geometry characterized by improved scaffolding, hoop strength and longitudinal flexibility. Also described are methods of making and deploying the stents.
255 Citations
38 Claims
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1. A medical device comprising:
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a catheter and a radially expandable stent mounted on the catheter, the stent comprising a hollow, cylindrical body comprising first and second rings extending circumferentially around the cylindrical body, each ring comprising an undulating series of peaks and valleys formed by struts connecting alternating curved peak and valley segments within the ring, the struts comprising a first curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within a ring form a nested chevron pattern; and
at least one longitudinal connection between the first and second rings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A medical device comprising:
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a catheter and a radially expandable stent mounted on the catheter, the stent comprising a hollow, cylindrical body comprising first and second rings extending circumferentially around the cylindrical body, each ring comprising an undulating series of peaks and valleys formed by struts connecting alternating curved peak and valley segments within the ring, the struts comprising a first curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within a ring form a nested chevron pattern;
wherein at least one strut on each of the first and second rings further comprises an inflection point positioned on a central portion of the strut; and
at least one longitudinal connector connecting the first and second rings at the inflection points on the struts. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A medical device comprising:
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a catheter and a radially expandable stent mounted on the catheter, the stent comprising a hollow, cylindrical body comprising first and second rings extending circumferentially around the cylindrical body, the first and second rings each comprising a plurality of closed members, each closed member comprising a peak and valley formed by a longer strut and a shorter strut connecting curved peak and valley segments, the longer and shorter struts each comprising a curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within a ring form a nested chevron pattern;
circumferential connectors between the longer strut and the shorter strut of circumferentially adjacent closed members; and
at least one longitudinal connection between the first and second rings. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification