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EJA:心脏手术中血栓弹性描记法评价的两种氨甲环酸剂量对纤维蛋白溶解的影响:一项随机对照研究

2014-08-18 MedSci小编 MedSci原创

心脏手术中凝血酸用于减少出血和输血的情况。然而,基于药代动力学,以最佳抑制纤维蛋白溶解的药物剂量还处于未知。考虑到高剂量凝血酸会导致癫痫发作,因此寻找最佳低剂量方案是十分有必要的。这项双盲随机对照先导试验,便是为了对比两个给药方案与安慰剂,对纤溶的临床作用。试验选取33名需要体外循环的心脏手术病人,随机分为3组。高剂量组: 一次性注射30 mg/ kg氨甲环酸,之后连续注射每小时

心脏手术中凝血酸用于减少出血和输血的情况。然而,基于药代动力学,以最佳抑制纤维蛋白溶解的药物剂量还处于未知。考虑到高剂量凝血酸会导致癫痫发作,因此寻找最佳低剂量方案是十分有必要的。项双盲随机对照先导试验,便是为了对比两个给药方案与安慰剂,对纤溶的临床作用。

试验选取33名需要体外循环的心脏手术病人,随机分为3组。高剂量组 一次性注射30 mg/ kg氨甲环酸,之后连续注射每小时16mg /kg−1 h−1,低剂量组 一次性注射5 mg/ kg氨甲环酸,之后连续注射5毫克公斤,5 mg kg−1 h−1 以及 安慰剂组氯化钠。

主要评估血栓和D-二聚体,以此来评价纤维蛋白溶解程度。次要终点是失血,输血需求和副作用。 

LY30>7.5%且在任何群体体外循环后没有观察到血栓则定义为显著纤溶。在注射鱼精蛋白后,高剂量组和安慰剂组对比,LY30差异为 0.7 [95% confidence interval (95% CI) –0.04 to 1.4];低剂量组与安慰剂相比,LY30差异为 0.78 (95% CI 0.02 to 1.5),高低两组LY30差异为–0.08 (95% CI –0.82 to 0.66) 。安慰剂组的D-二聚体显著增加,但出血或输血的要求没有明显差异。 

在这个剂量考察研究,两种剂量的氨甲环酸和安慰剂之间的纤维蛋白溶解无明显差异。仍需更大动力的研究。

原始出处:

Faraoni D1, Cacheux C, Van Aelbrouck C, Ickx BE, Barvais L, Levy JH.Effect of two doses of tranexamic acid on fibrinolysis evaluated by thromboelastography during cardiac surgery: A randomised, controlled study.Eur J Anaesthesiol. 2014 Sep;31(9):491-8. doi: 10.1097/EJA.0000000000000051.


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    2015-07-14 amyloid
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    2014-08-20 huagfeg

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