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Limited expansion endoluminal prostheses and methods for their use

机译:有限度扩张的腔内假体及其使用方法

摘要

The present invention provides controlled expansion endoluminal prostheses and methods for their deployment and expansion. The present stent-grafts generally comprise a radially expansible tubular frame and a plastically expansible liner on the frame. Either the frame or the liner includes a reinforcing element which limits expansion of the stent-graft at a predetermined expanded size. In some embodiments, the reinforcing element restrains the frame, for example, by limiting the circumferential diagonals of perforations on a perforate frame structure. Generally, however, the reinforcing element is included in the liner as circumferentially oriented yarn. A particularly advantageous liner includes composite circumferential yarns having inexpansible fibers wrapped around an expansible fiber, such as a partially oriented yarn, PTFE, or the like.
机译:本发明提供了可控扩张的腔内假体及其展开和扩张的方法。本发明的支架移植物通常包括径向可扩张的管状框架和框架上的可塑性扩张的衬里。框架或衬套都包括加强元件,该加强元件将支架移植物的扩张限制在预定的扩张尺寸。在一些实施例中,加强元件例如通过限制穿孔的框架结构上的穿孔的圆周对角线来约束框架。然而,通常,增强元件作为周向取向的纱线包括在衬里中。一种特别有利的衬里包括复合圆周纱线,该复合圆周纱线具有缠绕在可膨胀纤维周围的不可膨胀纤维,例如部分取向的纱线,PTFE等。

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