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静脉麻醉药对原代培养大鼠心肌细胞的毒性作用

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摘要 为探讨静脉麻醉药对原代培养大鼠心肌细胞的直接作用,将经原代培养成活4天后的大鼠心肌细胞分为9组,每组6孔;对照组为 C 组,其余8组分别为小剂量(TL,1×10^(-5)mol/L)与大剂量(TH,1×10^(-4)mol/L)硫喷妥钠组;小剂量(KL,1×10^(-5)mol/L)与大剂量(KH,1×10^(-4)mol/L)氯胺酮组;小剂量(HL,3×10^(-3)mol/L)与大剂量(HH,3×10^(-2)mol/L)羟丁酸钠组及小剂量(PL,3×10^(-5)mol/L)与大剂量(PH,3×10^(-4)mol/L)异丙酚组。各组均于实验开始后8h 评定心肌细胞搏动功能,观察细胞形态学改变,测定心肌细胞酶及电解质变化。结果;与对照组相比,KL 组心肌细胞搏动频率加快(P<0.05),TL、KH 及 PH 组,搏动频率明显减慢(P<0.05和 P<0.01);TH 组可见心肌细胞呈部分搏动或无搏动,细胞形态学亦有相应变化,LDH、AST 与 CK 释放量增加(P<0.05和P<0.01),ALP 活性下降。而 HL、HH、KL 及 PL 组对上述指标无明显影响。各组间电解质变化未见显著差异。结论:低浓度硫喷妥钠以及高浓度氯胺酮、异丙酚均有直接的心肌抑制作用,高浓度硫喷妥钠尤为明显;而羟丁酸钠及低浓度氯胺酮、异丙酚几无心肌细胞毒性作用,低浓度氯胺酮表现出正性变时性和变力性作用。
出处 《沈阳部队医药》 1999年第2期123-126,194,共5页
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