Stretchable Anti-Buckling Coiled-Sheet Stent
First Claim
1. A stretchable stent, comprising:
- a coiled-up sheet having overlapping inner and outer longitudinal sections, and being radially expandable between a first size and one or more larger sizes, the coiled-up sheet defining a periphery in a plane substantially perpendicular to a longitudinal axis thereof;
a plurality of teeth extending from the inner longitudinal section for engaging openings in the outer longitudinal section to selectively secure the coiled-up sheet in the one or more larger sizes; and
a stretchable portion comprising a plurality of resilient mesh elements extending along a portion of the coiled-up sheet, the mesh elements being adapted to partially recoil about the periphery of the coiled-up sheet when the stent is subjected to radially compressive forces.
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Accused Products
Abstract
A stent-graft having an exo-skeleton attached to a tubular graft, the tubular graft having a peripheral wall defining a lumen therein extending between first and second ends. The exo-skeleton may assume contracted and enlarged conditions, and includes one or more serpentine elements, each extending both peripherally and axially along at least a portion of the peripheral wall. Coiled-sheet stents are provided on the ends of the tubular graft for anchoring the ends within a body passage. Each serpentine element is a zigzag structure extending peripherally about the peripheral wall, with a plurality of serpentine elements distributed axially along the peripheral wall. The serpentine elements are individually attached to the peripheral wall and/or connector elements may extend between adjacent serpentine elements. Alternatively, each serpentine element may define a generally sinusoidal shape extending axially along the peripheral wall. The tubular graft may have a bifurcated end from which a tubular graft extension segment may extend and to which a docking limb may be attached. A plurality of serpentine elements may also be attached to the extension segment and the docking limb.
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Citations
7 Claims
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1. A stretchable stent, comprising:
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a coiled-up sheet having overlapping inner and outer longitudinal sections, and being radially expandable between a first size and one or more larger sizes, the coiled-up sheet defining a periphery in a plane substantially perpendicular to a longitudinal axis thereof;
a plurality of teeth extending from the inner longitudinal section for engaging openings in the outer longitudinal section to selectively secure the coiled-up sheet in the one or more larger sizes; and
a stretchable portion comprising a plurality of resilient mesh elements extending along a portion of the coiled-up sheet, the mesh elements being adapted to partially recoil about the periphery of the coiled-up sheet when the stent is subjected to radially compressive forces. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification