METHOD TO MINIMIZE CHAIN SCISSION AND MONOMER GENERATION IN PROCESSING OF POLY(L-LACTIDE) STENT
    38.
    发明申请
    METHOD TO MINIMIZE CHAIN SCISSION AND MONOMER GENERATION IN PROCESSING OF POLY(L-LACTIDE) STENT 审中-公开
    减少聚合(L-LACTIDE)STENT处理中的链分离和单体产生的方法

    公开(公告)号:US20140288628A1

    公开(公告)日:2014-09-25

    申请号:US14226727

    申请日:2014-03-26

    Abstract: Methods of fabricating an implantable medical devices such as stents made from biodegradable polymers are disclosed that reduce or minimize chain scission and monomer generation during processing steps. The method includes processing a poly(L-lactide) resin having an number average molecular weight between 150 to 200 kD in an extruder in a molten state. A poly(L-lactide) tube is formed from the processed resin and a stent is fabricated from the tube. The number average molecular weight of the poly(L-lactide) of the stent after sterilization is 70 to 100 kD.

    Abstract translation: 公开了制造可植入医疗装置的方法,例如由可生物降解的聚合物制成的支架,其可减少或最小化加工步骤期间的链断裂和单体产生。 该方法包括在熔融状态的挤出机中加工数均分子量为150〜200kD的聚(L-丙交酯)树脂。 由处理后的树脂形成聚(L-丙交酯)管,并由管制造支架。 灭菌后支架的聚(L-丙交酯)数均分子量为70〜100kD。

    METHODS FOR CRIMPING A POLYMERIC STENT SCAFFOLD ONTO A DELIVERY BALLOON
    39.
    发明申请
    METHODS FOR CRIMPING A POLYMERIC STENT SCAFFOLD ONTO A DELIVERY BALLOON 审中-公开
    将POLYMERIC STENT SCAFFOLD划入交付气球的方法

    公开(公告)号:US20140250667A1

    公开(公告)日:2014-09-11

    申请号:US14280476

    申请日:2014-05-16

    Inventor: Yunbing Wang

    Abstract: A medical device includes a polymer stent scaffold crimped to a catheter having an expansion balloon. A process for forming the medical device includes placing the scaffold on a support supported by an alignment carriage, and deionizing the scaffold to remove any static charge buildup on the scaffold before placing the scaffold within a crimper to reduce the scaffold's diameter. The polymer scaffold is heated to a temperature below the polymer's glass transition temperature to improve scaffold retention without adversely affecting the mechanical characteristics of the scaffold when deployed to support a body lumen.

    Abstract translation: 医疗装置包括卷曲到具有膨胀气囊的导管的聚合物支架构架。 用于形成医疗装置的方法包括将支架放置在由对准托架支撑的支撑件上,并且在将支架放置在卷曲器内以减少支架的直径之前,使支架去离子以去除支架上的静电荷积聚。 将聚合物支架加热到低于聚合物玻璃化转变温度的温度,以改善支架保持性,而不会在展开支架体腔时对支架的机械特性产生不利影响。

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