α-甲基去甲肾上腺素对家兔心肺复苏后早期心功能影响的实验研究  

Effects of α - methylnorepinephrine on cardiac function at early stage of postresuscitation in rabbits

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作  者:冯友繁[1] 李培杰[1] 李惠萍[1] 杨小华[1] 张谦[1] 刘宗宝[1] 

机构地区:[1]兰州大学第二医院急救中心,730000

出  处:《中国急救医学》2009年第4期330-333,共4页Chinese Journal of Critical Care Medicine

基  金:基金项目:甘肃省自然科学基金项目(No.0710RJZA036)

摘  要:目的明确选择性α2肾上腺素能受体激动剂α-甲基去甲肾上腺素(alpha—methylnorepinephrine,α—MNE)对复苏后家兔心功能的影响,探索更有效的复苏药物。方法通过体外致颤法建立家兔心肺复苏模型。18只清洁级家兔随机分为三组,手术对照组(A组),仅行麻醉、手术、气管插管,但不致颤;肾上腺素组(B组),在复苏时使用标准剂量肾上腺素(30μg/kg);α—MNE组(C组),在复苏时使用α-MNE(100μg/kg)。动态观察致颤前15min、复苏后30、60、120、180、240min左室舒张末压(LVEDP)、左室内压上升和下降最大速率(peak±dp/dt)及血清BNP浓度的变化。结果①与A组比较,其余两组复苏成功后LVEDP和BNP明显升高(P均〈0.01),peak±do/dt显著下降(P均〈0.01);②C组与同时相B组比较,LVEDP和BNP升高幅度明显降低(P均〈0.05),peak±dp/dt降低程度减轻(P〈0.05)。结论α-甲基去甲肾上腺素可以改善心肺复苏后心功能不全,对复苏后心脏有保护作用。Objective To observe the effects of selective α2 - adrenergic receptor agonist alpha- Methylnorepinephrine( α- MNE) as a vasopressin agent on hemodynamics, β -type natriuretic peptide ( β - type natriuretic peptide, BNP) in the rabbit cardiopulmonary resuscitation. Methods After setting up rabbit model of cardiopulmonary resuscitation, 18 rabbits were randomly divided into three groups, group A. operation - control group, only anesthesia, surgery, endotracheal intubation, but was not induced ventricular fibrillation ; group B : epinephrine group, administration of the standard dose of epinephrine (30 μg/kg) during CPR; group C: α-MNE group, administration of α-MNE ( 100 μg/kg) during CPR. The left ventricular end - diastolic pressure (LVEDP) , left ventricular pressure rise and fall rate ( peak± dp/dt ) and serum concentrations of BNP were observed. Result Compared with group A, the BNP and LVEDP of the remaining two groups gradually increased respectively ( P 〈 0.01 ), ± dp/dt decreased ( P 〈 0.01 ). Increases of BNP and LVEDP in group C were less than in group B ( P 〈 0.05, P 〈 0.05 ) , whereas peak ± dp/dt in group C were higher than in group B ( P 〈 0.05 ) at the same stage. Conclusions α -methylnorepinephrine can improve postresuscitation myocardial dysfunction.

关 键 词:心肺复苏 Α2肾上腺素能受体激动剂 复苏后心功能不全 

分 类 号:R605.974[医药卫生—急诊医学]

 

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