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IMPROVED METHODS OF POLYMERIC STENT SURFACE SMOOTHING AND RESURFACING TO REDUCE BIOLOGICALLY ACTIVE SITES
IMPROVED METHODS OF POLYMERIC STENT SURFACE SMOOTHING AND RESURFACING TO REDUCE BIOLOGICALLY ACTIVE SITES
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机译:减少聚合物活性部位的聚合物表面平滑和表面改性的改进方法
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摘要
The present invention provides methods for fabricating a stent using a chemical treatment to smooth, polish or strengthen the stent. One such treatment involves exposing the stent to acetone or a similar solvent. In certain embodiments, the additional step comprises placing the stent in a bath containing acetone, or a similar solvent, where the bath also contains the polymer the stent is composed of. The acetone bath step may be conducted at a temperature that is below the glass transition temperature. The present invention also provides for methods of fabricating a stent using an acetone bath that comprises poly (lactic) acid. Other embodiments provide for methods of fabricating a stent using an acetone bath that comprises poly (lactic) acid and polyethylene glycol.
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