杏丁注射液对兔严重心肌挫伤的治疗作用

目的:探讨杏丁注射液对心肌挫伤的治疗作用,为临床救治心肌挫伤提供实验依据.方法:利用BIM-Ⅱ型生物撞击机制备兔严重心肌挫伤模型;并用杏丁注射液进行治疗作为对照.分别于撞击前5 min,撞击后5,30 min,2,4,8,24 h采颈总动脉血检测血栓素A2(TXA2)、前列环素(PGI2)的含量;于伤后24h摘取心脏作光镜检查,随机取2只兔心作电镜检查,观察心肌组织形态学改变.结果:血浆PGI2浓度在伤后早期(伤后4 h)明显下降,而血浆TXA2浓度则明显升高.形态学检查心肌组织损伤较重.用杏丁注射液治疗后血浆PGI2浓度降低和TXA2浓度升高都较轻,心肌组织损伤也明显减轻.结论:杏丁注射液对心肌挫伤有治疗作用,其机制可能与杏丁注射液升高血浆PGI2浓度和降低TXA2浓度有关.

Experimental studies on treatment of severe myocardial contusion with Xingding injection in rabbits

AIM: To explore the role of Xingding injection (XDI), an injection made of traditional Chinese medicinal herbs, in the treatment of myocardial contusion in rabbits. METHODS: Thirty rabbits were randomly divided into three groups: control group with false-impact (control group, n=10), severe myocardial contusion group (MC group, n=10) and XDI treatment group (XDI group, n=10). The models of rabbit with severe myocardial contusion were made by BIM-II Horizontal Bioimpact Machine. At 5 min before impact and 5 min, 30 min, 2, 4, 8 and 24 h after impact, blood samples were taken from common carotid artery of rabbits in each group to measure the concentrations of plasma thromboxane A2 (TXA_2) and prostacyclin (PGI2) by radioimmunoprecipitation. At the end of the experiment, the heart of one rabbit from each group was harvested to observe the microstructural changes and 2 hearts were randomly taken from each group to observe ultra-structural changes. RESULTS: The concentrations of plasma PGI2 had a distinct falling-off while the contents of plasma TXA_2 were significantly higher in the early period of severe myocardial contusion (at 4 h after myocardial contusion). The morphological injuries of myocardial tissues were severe. With XDI, the reduction of the concentrations of plasma PGI2 and the increase of the contents of plasma TXA_2 were significantly relieved. The morphological injuries of myocardial tissues were obviously lessened. CONCLUSION: Xingding injection can improve the reduction of the concentrations of plasma PGI2 and the increase of the contents of plasma TXA_2 in the early period of severe myocardial contusion, which may concentrate to its therapeutic effect on severe myocardial contusion.