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US 2010/0244304 A1Published application
Stents fabricated from a sheet with increased strength, modulus and fracture toughness
OwnerYunbing Wanginventor
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Abstract
Methods of fabricating a polymeric stent from a polymer sheet with improved strength, modulus and fracture toughness are disclosed. The methods include stretching the polymer sheet along one or more axesto increase the strength, fracture toughness, and modulus of the polymer along the axis of stretching. The methods further include forming a tubular stent from the stretched sheet. The stent can include a slide-and-lock mechanism that permits the stent to move from a collapsed diameter to an expanded diameter and inhibiting radial recoil from the expanded diameter.
Claims21
A method of making a stent comprising:
- stretching polymer sheet along an axis, wherein the stretching increases the strength, fracture toughness, and modulus of the polymer;
- and
- forming a tubular stent from the stretched sheet, the stent comprising a slide-and-lock mechanism, the slide and lock mechanism permitting the stent to move from a collapsed diameter to an expanded diameter and inhibiting radial recoil from the expanded diameter.
A method of making a stent comprising:
- heating a polymer sheet to facilitate stretching of the sheet;
- stretching polymer sheet along an axis, wherein the stretching increases the strength, fracture toughness, and modulus of the polymer;
- actively cooling the deformed sheet to below a target temperature to stabilize the sheet at or close to a stretched state;
- and
- fabricating a stent from the deformed sheet after the cooling.
2 more elements
Dependencies are inferred from the claim text.