新型血管内可吸收镁合金支架的实验研究

来源 :第四届国际心血管热点论坛暨心脏交叉学科论坛·北京2012 | 被引量 : 0次 | 上传用户:aww2345
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  目的:评估自行设计制作的新型血管内可吸收镁合金支架的生物相容性、有效性和安全性。
  方法:杂种犬35只,每只犬均于冠状动脉和股动脉置入可吸收镁合金支架1枚,分别于术后24h、3d、5d、1周、2周、3周、4周,每个时间点5只犬,复查冠状动脉及血管造影后取材,分离支架段血管行组织病理观察及计算机图像分析,测量内弹力板面积、管腔面积、内膜增生面积及内膜增生面积百分比.
  结果:51枚支架成功置入35只犬的冠状动脉和股动脉,各时间点冠状动脉及股动脉造影均证实管腔通畅,无狭窄病变,无血栓形成.组织病理显示,支架置入术后24h、3d、5d、无内膜增生,仍有支架残留;术后l周支架完全降解;术后2周开始出现内膜增生,3周至4周内膜增生相对明显.各时间点均未见明显炎性反应和血栓形成;术后2周、3周、4周,内膜增生面积分别为(0.04±0.03)姗2,(0.10±0.03]衄2,(0.15±0.04.)衄2;内膜增生面积百分比分别为(1.84±1.18)%,(3.72±1.12)%,(6.29±3.36)%,组问有统计学差异(P<0.05).
  结论:血管内可吸收镁合金支架具有良好的生物相容性,安全有效,易操作,再狭窄程度轻,临床应用前景好。
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