Am J Obstet Gynecol:活化凝血因子Ⅶ能够减少前置胎盘产妇出血而不引起全身凝血反应!

2017-06-29 Emma MedSci原创

前置胎盘是妊娠晚期出血的主要原因之一,是妊娠期的严重并发症。多见于经产妇,尤其是多产妇。前置胎盘主要威胁是出血,少量、多次的出血,可以造成孕妇贫血,抵抗力下降,并影响胎儿的生长、发育,甚至严重的、大量的出血可危及母儿的生命,因此正确的处理十分重要。在这种情况下,胎盘组织中有很高浓度的组织因子,它能够非常有效地激活凝血,而组织因子的凝血作用需要活化凝血因子Ⅶ,研究人员希望能够通过这一特点开发针对出血

前置胎盘是妊娠晚期出血的主要原因之一,是妊娠期的严重并发症。多见于经产妇,尤其是多产妇。前置胎盘主要威胁是出血,少量、多次的出血,可以造成产妇贫血,抵抗力下降,并影响胎儿的生长、发育,甚至严重的、大量的出血可危及母儿的生命,因此正确的处理十分重要。在这种情况下,胎盘组织中有很高浓度的组织因子,它有激活凝血的作用,而组织因子的凝血作用需要活化凝血因子Ⅶ,研究人员希望能够通过这一特点开发针对出血的治疗方法。

共5例前置胎盘剖腹产病例,在切除胎盘后,用含有活化凝血因子Ⅶ(1mg/246mL)的生理盐水浸泡胎盘部位2分钟,如果出血没有充分减少就再重复一次。记录治疗录像,测量失血量,还测定了血红蛋白浓度、血小板计数、国际标准化比、活化部分凝血酶时间、纤维蛋白原(功能性),在去除胎盘之前和之后15分钟,外周血中凝块和凝血酶的生成,还检测了由于其他原因进行剖宫产的5名女性的凝血变量。对未配对数据使用Mann Whitney检验。

结果显示,5例前置胎盘剖腹产病例中,在几乎干燥的条件下进行子宫切开术,中位失血量为490mL(范围300 mL-800 mL)。活化凝血因子Ⅶ没有引起不良反应,也没有检测到其进入血液循环,亦没有观察到外周血循环中凝血酶产生、纤维蛋白原、活化部分凝血酶时间、国际标准化比值和血小板计数的显著变化(P>0.20)。
这项研究表明,对于前置胎盘患者,应用活化凝血因子Ⅶ可减少胎盘部位出血而不引起全身凝血反应,这为前置胎盘妊娠晚期出血的治疗以及相关药物的开发提供了重要参考。

原始出处:
Birgit T.B.G.,et al. Topical application of recombinant activated factor VII during cesarean delivery for placenta previa. Am J Obstet Gynecol. 2017 Jun;216(6):608.e1-608.e5.  doi: 10.1016/j.ajog.2017.02.024.

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