对于冠状动脉开口病变,支架的精确定位可有效提高介入治疗的效果.本文重点介绍了现有的几种支架精确定位的技术和相关的辅助器械,其中包括支架draw-back技术,Szabo或"尾丝"技术,使用镍钛记忆合金的Ostial Pro支架定位系统.本文阐明了支架植入时精确定位的关键技术要求,介绍了上述3种支架定位技术在国内外的临床使用情况.本文最后介绍了建立在Ostial Pro支架定位系统基础上,作者设计的一种镍钛合金丝一体成型的支架精确定位系统,希望提高支架定位装置的安全性和可操控性.%The precise placement of stents improves the effect of percutaneous coronary intervention ( PCI ) in the treatment of aorto-ostial lesions. Three existing methods for stent positioning and the related supporting equipments are discussed as key points in this paper, including stent draw-back technique, the Szabo or "tail-wire" technique, and the ostial stent positioning system ( Ostial Pro ) used with self-expandable nitinol stent. This paper illustrates the key technical requirement of the precise positioning for stent implantation, introduces the clinical use of the three stent positioning techniques at home and abroad. At last, the paper introduces a new knitted stent positioning system made of nitinol wire, which is designed by the authors and may improve the safety and the controllability of stent positioning systems to treat the ostial lesions in the future.
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