不同种类冠状动脉支架生物相容性与置入后血管再狭窄

目前，冠状动脉支架已广泛应用于临床，它可明显改善经皮腔内冠状动脉成形术引起的急性闭塞并发症以及血管再狭窄。但支架置入同样面临再狭窄的问题，尤其是复杂病变更易形成再狭窄。研究证实，血栓、炎症和平滑肌增生是支架再狭窄的3个重要阶段，其中血管内膜增生是再狭窄的最主要机制。文章通过检索文献总结了金属支架、药物洗脱支架的生物相容性及置入后再狭窄，分析了支架置入对侧支循环功能及炎性反应的影响，并探讨了生物可降解支架的应用。

Biocompatibility of different coronary stents and restenosis following implantation

At present, coronary stent has been extensively used in clinic. It can significantly improve acute obstruction complication and vascular restenosis following percutaneous transluminal coronary angioplasty. However, restenosis also takes place after stent implantation, in particular for complex pathological changes. It has been demonstrated that thrombus, inflammation, and smooth muscle hyperplasia are three important stages for in-stent restenosis, and vascular intima hyperplasia is the major mechanism. After retrieving related articles, this paper discussed biocompatibility and restenosis of metal stent and drug-eluting stent, analyzed influence of stent implantation on collateral circulation function and inflammatory reactions, and explored the application of biodegradable stent.