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对静脉动脉外体膜氧化患者进行自由或限制性输血:使用OBLEX研究数据进行目标试验模拟
Le Thi Phuong Thao1, Hergen Buscher2, Tri-Long Nguyen3
1School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia. thao.le@monash.edu.
对静脉脉外体膜氧化 (VA-ECMO) 患者的自由红细胞输血策略显示了早期生存益处. 然而,这种好处仅限于VA-ECMO支持的最初几天.
科学领域:
- 心血管研究研究心血管研究
- 关键护理医学 关键护理医学
- 血液学 血液学 血液学
背景情况:
- 对于静脉外体膜氧化 (VA-ECMO) 患者的最佳输血值尚未得到明确定义.
- 现有的证据不足以指导这种脆弱人群的输血实践.
研究的目的:
- 模拟一个目标试验,比较VA-ECMO患者的自由与限制性红细胞输血策略.
- 评估输血值对在VA-ECMO启动七天内住院死亡率的影响.
主要方法:
- 利用了来自国际前性观察性OBLEX研究 (NCT03714048) 的数据.
- 模拟了一个目标试验,使用顺序试验方法来估计因果对比.
- 定义自由输血为血红蛋白≥90g/L,限制性为血红蛋白≤70g/L.
主要成果:
- 包括534名VA-ECMO患者; 46%的患者在医院死亡.
- 自由输血在前2-3天内显示了适度的生存益处 (NNT 7-8).
- 在第3天之后没有观察到显著的生存差异;在所有灵敏度分析中发现一致.
结论:
- 自由的输血门可能在VA-ECMO早期阶段提供短期生存优势.
- 生存益处不会超过VA-ECMO支持的最初几天.
- 需要进一步的前性研究来验证发现并探索机制.
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