Coil Bioabsorbable Stents
2 Assignments
0 Petitions
Accused Products
Abstract
An expandable, bioabsorbable stent having a coiled-coil configuration is described. The stent further comprises regions of variable pitch that allow for variation in either rigidity, or variability diameter within sub-regions along the length of the deployed stent. By varying the diameter allows the stent to extend into regions such as branched vessels, or into the neck of aneurysms. In some embodiments, the stent comprises longitudinal support fibers that run substantially the length of the deployed stent to provide additional strength. In addition, the stent may also comprise regional support fibers that run less than the length of the stent, and which provide increased regional strength while permitting flexibility of the stent. The stent further comprises micro-tubes that are configured to be visible using medical imaging techniques. The stent can be manufactured from materials that are bioabsorbable and/or include the ability to release pharmacologically active substances over time.
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Citations
42 Claims
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1-21. -21. (canceled)
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22. An expandable stent comprising:
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a single filament shaped into a plurality of primary coils that each include a plurality of secondary coils; wherein the stent has a first stent diameter when the stent is in a furled configuration; wherein a first set of the secondary coils has a first coil diameter, and wherein a second set of the secondary coils has a second coil diameter, wherein the first coil diameter is larger than the second coil diameter; and wherein first and second sets of secondary coils are configured such that, when the stent in an unfurled configuration, the stent has a second stent diameter and a third stent diameter, wherein the second and third stent diameters are larger than the first stent diameter, and wherein the second stent diameter is larger than the third stent diameter. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. An expandable stent comprising:
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a filament shaped into a plurality of primary coils that each include a plurality of elements having a decreased radius of curvature in a furled configuration; wherein at least one of the elements is expandable beyond others of the elements and arranged such that upon expansion of the elements the stent assumes an unfurled configuration having two distinct diameters. - View Dependent Claims (31, 32, 33, 34, 35, 36)
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37. An expandable stent comprising:
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a filament shaped into a plurality of primary coils that each include a plurality of elements having a decreased radius of curvature; a first and a second longitudinal support fiber coupled to the filament and longitudinally extending along a length of the stent to thereby increase stability of the stent; wherein the first longitudinal support fiber is configured to allow localized flexing of the second longitudinal support fibers about a longitudinal axis of the stent. - View Dependent Claims (38, 39, 40, 41, 42)
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Specification