介入法犬股骨头坏死模型制作

目的 应用介入方法建立犬股骨头坏死模型.方法 9只成年杂种犬全麻后,分别通过股动脉Seldinger法穿刺插管,超选一侧股骨头供血动脉行平阳霉素灌注及明胶海绵栓塞处理,建立股骨头缺血坏死模型,对侧股骨头作对照.模型犬随机分为3组,每组3只,分别于栓塞术后2、4、6周处死.所有犬均于栓塞术前及术后每周行双侧髋关节MRI扫描,栓塞术前、术后即刻、处死前行双侧股骨头供血动脉DSA造影检查,最后一次造影结束处死动物,取双侧股骨头标本送病理学观察.结果 9只犬均造模成功,术后所有栓塞动脉造影复查均未见再通.造模侧股骨头在术后2周出现早期病理学改变.术后4周MRI显示股骨头坏死异常信号,病理切片出现不同程度骨细胞及骨小梁坏死,术后6周病理切片可见坏死后增生及修复反应.结论 本法能成功制作出犬股骨头坏死模型,具有创伤小、造模方法简单、成模时间短、动物死亡率低等优点,是一种比较理想的造模方式.

Preparation of femoral head necrosis model in canine with endovascular technique

Objective To establish a femoral head necrosis model in canine by using endovascular technique. Methods After general anesthesia,catheterization with Seldinger technique via femoral access was carried out in 9 healthy hybrid adult dogs. When super-selective catheterization of the feeding artery of one-side femoral head was accomplished,Pingyangmycin and gelfoam particles were injected through the catheter to embolize the artery,and the femoral head necrosis model was thus established,with the offside femora...