公开(公告)号：US20160296730A1

公开(公告)日：2016-10-13

申请号：US14880109

申请日：2015-10-09

申请人： Edwards Lifesciences Corporation

发明人： Pu Zhou ,  Erik Bulman ,  Timothy A. Geiser ,  Michael G. Valdez ,  Yidong M. Zhu ,  Baigui Bian ,  Sonny Tran ,  Richard D. White ,  Thanh Huy Le ,  Tung T. Le ,  Alpana K. Gowdar

IPC分类号： A61M25/06 ,  A61F2/24

摘要： A delivery sheath includes an elastic outer tubular layer and an inner tubular layer having a thick wall portion integrally connected to a thin wall portion. The inner tubular layer can have a compressed or folded condition wherein the thin wall portion folds onto an outer surface of the thick wall portion under urging of the elastic outer tubular layer. When an implant passes therethrough, the outer tubular layer stretches and the inner tubular layer unfolds into an expanded lumen diameter. Once the implant passes, the outer tubular layer again urges the inner tubular layer into the compressed condition with the sheath reassuming its smaller profile. The sheath may also include selectively placed longitudinal rods that mediate friction between the inner and outer tubular layers to facilitate easy expansion and collapse, thereby reducing the push force needed to advance the implant through the sheath's lumen.

摘要翻译： 输送护套包括弹性外管状层和内管状层，其具有与薄壁部分一体连接的厚壁部分。 内部管状层可以具有压缩或折叠状态，其中薄壁部分在弹性外部管状层的推动下折叠到厚壁部分的外表面上。 当植入物通过其中时，外管层延伸并且内管层展开成扩张的内腔直径。 一旦植入物通过，外管层再次迫使内管层进入压缩状态，护套重新确定其较小的轮廓。 护套还可以包括选择性放置的纵向杆，其介导内部和外部管状层之间的摩擦，以便于容易的膨胀和塌缩，从而减少使植入物通过护套的内腔所需的推力。