使用二氧化碳通风器等效的生理死空间的非侵入性替代品:在单中心队列中进行测试,2017-2023年
Anoopindar K Bhalla1,2, Margaret J Klein1, Justin Hotz1
1Department of Anesthesiology and Critical Care Medicine, Children's Hospital Los Angeles, Los Angeles, CA.
概括
二氧化碳呼吸器等效 (VEqCO2) 是一种与急性呼吸困扰综合征儿童死亡风险相关的非侵入性标志物,其性能与生理死空间分数 (VD/VT) 相似. 这一发现表明VEqCO2可能在临床环境中作为VD/VT的实际替代品.
科学领域:
- 儿科重症监护医学 儿科重症监护医学
- 呼吸系统生理学 呼吸系统生理学
- 临床结果研究研究
背景情况:
- 死亡空间,肺部没有参与气体交换的部分,是呼吸衰竭的关键因素.
- 准确评估死空间对于治疗急性呼吸困扰综合征 (ARDS) 患者至关重要.
- 测量死亡空间的传统方法,如生理死亡空间分数 (VD/VT),通常需要侵入性血液气体测量.
研究的目的:
- 评估二氧化碳呼吸器等效 (VEqCO2) 与ARDS儿童死亡风险之间的关联.
- 将VEqCO2的预测能力与其他死空间标记器进行比较,包括VD/VT,末潮膜死空间分数 (AVDSf) 和通风器比率 (VR).
- 确定VEqCO2是否可以作为VD/VT的非侵入性替代品.
主要方法:
- 在2017年至2023年期间,对131名ARDS儿童进行了回顾性队列研究,这些儿童被录取到四级PICU.
- 死亡空间标记 (VEqCO2,VD/VT,AVDSf,VR) 被计算在侵入性机械通风启动后的72小时内.
- 使用多变量后勤回归模型来评估死空间标记和死亡率之间的关联,调整为氧化指数 (OI) 和其他共变量.
主要成果:
- 较高的VEqCO2,VD/VT和VR显著与增加死亡率相关.
- VEqCO2与死亡风险的关联与VD/VT相似.
- 在对死空间标记进行控制后,AVDSf和死亡率之间没有发现显著的关联,OI和死亡率之间也没有发现显著的关联.
结论:
- 二氧化碳呼吸器等效 (VEqCO2) 独立地与儿科ARDS的死亡风险有关.
- VEqCO2的性能与VD/VT.等已知死空间标记器的性能相当.
- VEqCO2代表了一种有前途的静脉疾病/静脉治疗的非侵入性替代品,促进了临床评估,并可能改善临床管理.
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