Blood:血小板计数高于25x109/L时,给新生儿输注血小板反而会增加出血和死亡风险

2019-10-25 QQY MedSci原创

新生儿血小板减少症输注血小板的试验(PlaNeT-2)显示,与以50x109/L为阈值相比,以25x109/L为预防大出血和(或)早产儿死亡的输注血小板的阈值获得了意想不到的总体效益(绝对风险降低7%)。但该试验中的部分新生儿可能从25x109/L阈值中获益甚少,甚至会受到伤害。

中心点:

近期的一个随机对照试验显示,血小板计数>25x109/L时,新生儿输注血小板反而会增加死亡或出血风险。

摘要:

新生儿血小板减少症输注血小板的试验(PlaNeT-2)显示,与以50x109/L为阈值相比,以25x109/L为预防大出血和(或)早产儿死亡的输注血小板的阈值获得了意想不到的总体效益(绝对风险降低7%)。但该试验中的部分新生儿可能从25x109/L阈值中获益甚少,甚至会受到伤害。

现研究人员对PlaNet-2试验中治疗效果的异质性进行评估,以明确是否所有早产儿都能从低阈值中获益。研究人员以PlaNet-2数据建立了一个多变量的逻辑回归模型,来预测所有653名新生儿大出血和(或)死亡的基础风险。随后,根据预测的基础风险,将新生儿分至四个风险分位。然后在这些分位中评估50x109/L阈值组和25x109/L阈值组间的绝对风险差异。

共146位新生儿死亡或发生大出血。模型内部验证的c统计量为0·63。25x109/L阈值与所有风险层的绝对风险降低相关,从最低的4.9%到最高风险组的12.3%。

上述结果表明25x109/L为预防性输注血小板的血小板计数阈值可适用于所有的早产儿,且与基础预测风险无关。未来的研究需进一步提高基础风险的预测准确性。

原始出处:

Susanna Frederika Fustolo-Gunnink, et al.Preterm neonates benefit from low prophylactic platelet transfusion threshold despite varying risk of bleeding or death.Blood.2019000899. https://doi.org/10.1182/blood.2019000899

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    2020-05-07 xinmeili
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    2019-10-27 1ddf0692m34(暂无匿称)

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