JAMA:对于极低出生体重儿,严重贫血增加了坏死性小肠结肠炎的风险

2016-03-04 MedSci MedSci原创

关于红细胞(RBC)输血和贫血而引起坏死性小肠结肠炎(NEC)的数据是相互矛盾的。这些关联还没有前瞻性评估,计算那些反复,随时间变化的风险。原始出处:Ravi M. Patel,Andrea Knezevic,Neeta Shenvi,et al.Association of Red Blood Cell Transfusion, Anemia, and Necrotizing Enterocol

关于红细胞(RBC)输血和贫血而引起坏死性小肠结肠炎(NEC)的数据是相互矛盾的。这些关联还没有前瞻性评估,计算那些反复,随时间变化的风险。

该研究的目的是确定RBC输血,严重贫血,和NEC之间的关系。

在一项二级,前瞻性,多中心观察队列研究中(在2010年1月至2014年2月进行),极低出生体重儿(VLBW,≤1500g),在出生后5天,被送到了亚特兰大3个III级新生儿重症监护病房。两家为所学术医院,1家为社区医院。婴幼儿接受了直到90天的随访,出院,转移到一家非研究附属医院,或死亡(以先发生哪种情况为准)。多变量竞争风险Cox回归,包括调整出生体重,中心,母乳喂养,疾病严重程度,以及初始抗生素治疗时间,被用来评估RBC输血,严重贫血,和NEC之间的关联。

主要结果是RBC输注。二级结果是严重贫血,定义为先验血红蛋白水平8g/dL或更低。这两次结果是在每周的间隔时间以时间变化的协变量被评估。

坏死性小肠结肠炎,定义为Bell 2期或更大,通过预先计划进行设定。死亡率作为一个竞争风险被评价。

600名VLBW婴儿被纳入研究,598名被进行了评价。44(7.4%)名婴儿患有NEC。32(5.4%)名婴儿死亡(所有原因)。53%的婴儿(319名)共接受1430次RBC输血。 在第8周所有的RBC输血暴露的婴儿中NEC未经调整的累积发生率为9.9%(95%CI,6.9%-14.2%) vs 未经RBC输血暴露的为4.6%(95%CI,2.6%-8.0%)。在多变量分析中,在给定的一周中RBC输血与NEC率没有显著相关(调整具体原因后的风险比,0.44[95%CI,0.17-1.12]; P=0.09)。基于血红蛋白的4565纵向测量评估(平均,7%的婴幼儿),与那些没有严重贫血的VLBW相比,在给定一周中,有严重贫血的VLBWNEC率显著增加(调整具体原因后的危险比,5.99[95%CI,2.00-18.0]; P=0.001)。

在VLBW婴儿中,严重贫血,但不进行红细胞输血,增加了NEC的风险。还需要进一步的研究来评估是否预防严重贫血比减少红细胞输血更重要。

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    2018-03-19 1e145228m78(暂无匿称)

    学习了.谢谢作者分享!

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    2016-03-05 millore
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