在COVID-19相关的ARDS患者中,氧血球分裂曲线的演变
Charlotte Dalne1, Patrick Biston1, Michaël Piagnerelli1,2
1Intensive Care. CHU-Charleroi Chimay, Université Libre de Bruxelles, Charleroi, Belgium.
Frontiers in physiology
|November 26, 2024
概括
在患有严重急性呼吸困扰综合征 (ARDS) 的COVID-19患者中,修正后的P50显着较低,这表明氧血球分离曲线左移. 这一发现与重症监护室 (ICU) 死亡率没有相关性.
科学领域:
- 临界护理医学 临界护理医学
- 肺部病理学 肺部病理学
- 生物化学 生物化学
背景情况:
- 严重的低氧化症是COVID-19相关的急性呼吸困扰综合征 (ARDS) 中重症监护室 (ICU) 入院的主要驱动因素.
- 以前的研究表明,这些患者的氧血球分离曲线向左转移,可能与较低的死亡率有关,但缺乏强大的方法和对照组.
- 精确评估氧血球分离曲线需要P50计算,并对pH,PaCO2和温度进行校正.
研究的目的:
- 为了比较重症COVID-19 ARDS (通风和非通风) 的ICU患者的修正P50,与其他原因的ARDS进行比较.
- 调查 ICU 住院最初 3 天期间纠正的 P50 的演变.
- 为了确定纠正的P50和ICU死亡率之间的关系.
主要方法:
- 从214名COVID-19ARDS患者和35名其他原因的ARDS患者的血液气体数据的回顾性分析.
- 使用Dash等人修改的Hill公式计算校正的P50,并根据pH,PaCO2和温度进行调整.
- 收集ICU死亡率数据并分析ICU前3天P50演变的情况.
主要成果:
- 分析了严重缺血的患者:PaO2 / FiO2为76mmHg (输入管中的COVID-19),79mmHg (非输入管中的COVID-19),和142mmHg (其他ARDS).
- 与其他ARDS (27.2mmHg) 相比,COVID-19ARDS患者 (21.2mmHg非输管,25.5mmHg输管) 的纠正P50显著较低.
- 经校正的P50在3天内没有显著变化 (除了非入室COVID-19ARDS) 并与ICU死亡率无关 (OR=0.98).
结论:
- 严重的COVID-19ARDS患者在ICU入院时表现出左转的氧血球分离曲线,无论其通风状态如何.
- 这种左转在初始ICU期间没有持续变化,也不是死亡率的预测指标.
- 研究结果强调了COVID-19 ARDS与其他形式的ARDS相比,血红蛋白与氧气结合的差异,但P50不是可靠的预后标志物.
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