METHOD OF INCREASING STENT RETENTION OF BIOABSORBABLE SCAFFOLDING WITH A SHEATH

    公开(公告)号:US20180154585A1

    公开(公告)日:2018-06-07

    申请号:US15828253

    申请日:2017-11-30

    Abstract: A medical device includes a polymer stent crimped to a catheter having an expansion balloon. The stent is crimped to the balloon by a process that includes heating the stent to a temperature below the polymer's glass transition temperature to improve stent retention without adversely affecting the mechanical characteristics of the stent when later deployed to support a body lumen. A variable diameter sheath with a central portion that prevents expansion of the stent when the balloon is pressurized and larger diameter ends is disposed over the crimped stent-balloon assembly. The balloon is pressurized and the larger diameter ends of the sheath allow the balloon beyond the ends of the stent to expand. The balloon is then depressurized.

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