摘要
目的观察含聚乙二醇-牛血红蛋白(polyethylene glycol-bovine hemoglobin,PEG-bHb)的心脏停搏液对离体心脏功能的影响。方法32只成年雄性S-D大鼠根据停搏液不同随机分为4组,麻醉后开胸取心,建立Langendorff离体心脏灌注模型,平衡20 min后灌注冷St.Thomas液或三种不同浓度的PEG-bHb停搏液,30℃保持60 min后恢复灌注。记录各组左室发展压(LVDP)、左心室内压最大变化速率(±dp/dtmax)和冠脉流出量(CF)等血流动力学指标,并行超微结构观察。结果恢复灌注后,三个PEG-bHb组的LDVP、±dp/dtmax及CF均显著高于St.Thomas液组(P<0.05),超微结构也得到较好的保护。三个PEG-bHb组之间除CF外,其余指标均无明显差异(P>0.05)。结论以PEG-bHb制成的含血停搏液可以改善离体心脏的血流动力学表现和超微结构。
OBJECTIVE To evaluate the effect of polyethylene glycol-bovine hemoglobin(PEG-bHb)-containing cardioplegic solution on cardiac function in isolated animal hearts.METHODS The hearts of 32 male S-D rats were harvested and transferred to langendorff circuit.They were divided into 4 groups according to cardioplegia: St.Thomas or 3 different concentrations of PEG-bHb in St.Thomas solution.After 20 min balance period,hearts were perfused with cold(4℃) cardioplegic solutions,and preserved at 30℃ for 60 min,then reperfused.RESULTS After reperfusion,left ventricular developed pressure(LVDP),derivative of pressure(±dp/dtmax) and coronary flow(CF) were higher in PEG-bHb groups(P〈0.05).Ultrastructures were better preserved in PEG-bHb groups.There was no difference among 3 PEG-bHb groups except CF.CONCLUSION PEG-bHb in cardioplegic solutions can improve hemodynamic values and ultrastrctures in hearts after ischemia.
出处
《中国体外循环杂志》
2008年第2期100-103,共4页
Chinese Journal of Extracorporeal Circulation
关键词
聚乙二醇-牛血红蛋白
停搏液
心脏功能
血流动力学
超微结构
Polyethylene glycol-bovine hemoglobin
Cardioplegic solution
Myocardial function
Hemodynamics
Ultrastructure