采用经导管动脉栓塞术建立猪股骨头缺血性坏死模型

目的探讨经皮穿刺供血动脉栓塞建立猪股骨头缺血性坏死（ANFH）模型的可行性。方法健康杂种家猪20只,随机分为实验组和对照组,每组10只。实验组：采用经皮穿刺插管的方法经右侧股动脉插入5F Cobra导管至左侧股动脉,超选择性插入股骨头供血动脉,用长约500μm的真丝微粒栓塞供血动脉;对照组：仅行左侧髂总动脉造影,不行动脉栓塞。术后2周和4周分别行左侧髋关节X线摄片、CT和MR检查;第4周影像学检查结束后行病理学检查,观察细胞形态,并计算单位面积的骨小梁体积和空缺骨陷窝百分比,对两组影像学和病理学资料进行比较。结果栓塞术后2周,股骨头X线平片无明显异常表现;CT示髋部软组织肿胀,MRI显示髋关节腔内长T2信号。栓塞4周后,X线平片、CT和MRI示实验组股骨头典型缺血性坏死改变;对照组未见明显异常改变。组织病理学检查显示,实验组骨细胞核固缩、深染,骨细胞减少或消失;单位面积的空缺骨陷窝百分比增多,骨小梁体积减少,与对照组比较差异有统计学意义（P〈0.05）。结论采用经皮穿刺股骨头供血动脉栓塞可成功建立猪ANFH模型,并较好地模拟ANFH的临床病理过程。

Establishment of pig avascular necrosis of femoral head model by transcatheter arterial embolization

Objective To evaluate the technical feasibility of animal model of avascular necrosis of femoral head(ANFH) with transcatheter arterial embolization(TAE).Methods Twenty experimental pigs were random1y divided into experimental group and control group(each n=10).Experimental group: A 5F Cobra catheter was inserted into left femoral artery,and the feeding arteries of femoral head were superselectively inserted.The feeding arteries were embolismed through transcatheter arterial injecting the segments of silk m...