溶栓合剂超早期颈内动脉溶栓的病理学实验研究

Pathological study of Thrombolytic Compound on thrombolysis by internal carotid artery injection at superacute stage

目的 探讨溶栓合剂的超早期颈内动脉溶栓疗效。方法 采用改进的微栓子法建立大鼠局灶脑缺血模型 ,缺血后 3h颈内动脉逆向插管溶栓治疗。将模型鼠随机分为A、B、C 3组 (A组为生理盐水对照组、B组为尿激酶治疗组、C组为溶栓合剂治疗组 ) ,分别在缺血后 2h、溶栓后 2 5h和 2 3 5h评定神经功能 ,溶栓后 2 4h取脑制备HE染色光镜标本及透射电镜标本观察病理学改变。结果 (1)A、B、C 3组的神经功能评分两两相比 ,给药前无显著差异 ,给药后C组与A组相比差异有显著性 (P <0 0 5 ) ,B组与A组间差异无显著性 ;(2 )A、B、C 3组的光镜病理学分级评分结果分别为 (3 0 6± 0 93)、(2 6 4± 1 2 2 )、(2 11± 1 0 8) ,C组与A组相比差异有显著性 (P <0 0 5 ) ;B组与A组相比差别无显著性。透射电镜观察 ,A组病变最重 ,B组其次 ,C组最轻。结论 溶栓合剂能够改善大鼠脑缺血后的神经功能 ,减轻病理改变 ;尿激酶对神经功能及病理改变的影响无显著意义。

Objective To study the effect of Thrombolytic Compound (TC) injected into internal carotid at superacute stage.Methods 66 Wistar rats were divided into group A,B and C randomly. Focal cerebral ischemic model was established by improved microthromboembolus method. The rats were intubated conversely into internal carotid 3h after cerebral ischemia for treatment with normal saline (group A),Urokinase(group B) and TC(group C) respectively. The neural functions of these rats were evaluated at 2 h after cerebral ischemia,2.5 and 23.5h after treatment and pathological changes were observed under optic and electron microscopes 24 h following thrombolysis.Results There was no significant difference of neural function scores among the three groups before administration.The scores of group C were lower than those of group A after treatment ( P < 0.05). However,no significant difference was found between group A and B. The pathological changes were evaluated by 5 grades under the optic microscope. There were (3.06±0.93) in group A,( 2.64± 1.22) in group B and (2.11±1.08) in group C. There was significant difference between group C and A ( P < 0.05). The most severe pathological change was found in group A,next in group B,and mild in group C.Conclusions TC may alleviate focal cerebral ischemic injury of rats and improve the score of neural function.