Balloon expanded polymer stent
AssigneeAbbott Cardiovascular Systems Inc.
InventorsMikael Trollsas, Michael H. Ngo, Boris Anukhin, Alexander Nikanorov, Syed Hossainy, John E. Papp, Dudley Jayasinghe, Zella Solter
Life of this patent
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Abstract
A stent made from a material comprising a polymer is disclosed. The stent has a pre-crimp diameter and a wall thickness such that a ratio of the pre-crimp diameter to the wall thickness is between 30 and 60. The stent has a pattern of interconnected elements. The interconnected elements including a plurality of rings connected by links, wherein each ring includes struts and crowns, and the struts are configured to fold at the crowns when the stent is crimped to the balloon.
Claims19
A medical device, comprising:
- a stent made from a material comprising a polymer,
- the stent has a pre-crimp diameter and a wall thickness such that a ratio of the pre-crimp diameter to the wall thickness is between 30 and 60,
- the stent is configured for being crimped to a balloon, and
- the stent has a pattern of interconnected elements, the interconnected elements including a plurality of rings connected by links, wherein each ring includes struts and crowns, and the struts are configured to fold at the crowns when the stent is crimped to the balloon, and wherein each of the rings includes U crowns, and the links connected to their respective rings form, with the respective rings, either a W crown or a Y crown.
A medical device, comprising:
- a stent made from a material comprising a polymer,
- the stent has a pre-crimp diameter, an expanded diameter, and a wall thickness such that a ratio of the pre-crimp diameter to the wall thickness is between 25 and 45,
- the stent is configured for being crimped to a balloon, and
- the stent has a pattern of interconnected elements, the interconnected elements including a plurality of undulating rings connected by links, wherein
- each ring includes struts and crowns, and the struts are configured to fold at the crowns when the stent is crimped to the balloon, and
- each of the struts and each of the links has a width and a thickness, and
- wherein an aspect ratio (AR) of the width to thickness of at least some of the struts or at least some of the links is between 0.4 and 1.4,
- wherein when the stent has the expanded diameter the stent has a radial stiffness greater than 0.3 N/mm2.
A medical device, comprising:
- a balloon,
- a stent crimped to the balloon so that the stent is configured in a crimped state,
- the stent is made from a material comprising a polymer,
- the stent has a pattern of interconnected elements, the interconnected elements including a plurality of undulating rings connected by links, wherein each ring includes struts and crowns,
- the struts are configured to unfold at the crowns when the balloon inflates, thereby causing the stent to expand from the crimped state to an expanded state, and
- the stent has an expanded diameter and a wall thickness when in the expanded state, and a ratio of the expanded diameter to the wall thickness is between 25 and 50,
- wherein when the stent has the expanded diameter the stent has a radial stiffness greater than 0.3 N/mm2.
Dependencies are inferred from the claim text.