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机械通风的COVID-19患者中缺氧的病理生理学:计算机断层扫描研究
Alessandro Santini1, Alessandro Protti1, Michele Ferrari2
1Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, Pieve Emanuele, Milan 20072, Italy; IRCCS Humanitas Research Hospital, Via Alessandro Manzoni 56, Rozzano, Milan 20089, Italy.
Respiratory physiology & neurobiology
|September 13, 2023
概括
在COVID-19急性呼吸窘迫综合征 (C-ARDS) 中的低氧化症可能源于通过小肺切线的高血流,而不仅仅是通风-透气不匹配. 这一发现为C-ARDS患者提供了新的治疗点.
科学领域:
- 肺部医学 肺部医学
- 关键护理医学 关键护理医学
- 传染性疾病 传染性疾病
背景情况:
- 在COVID-19急性呼吸窘迫综合征 (C-ARDS) 中缺氧的主要原因仍在争论中.
- 假设包括通风 - perfusion (V/Q) 不匹配与解剖间隔.
- 了解确切的机制对于有效治疗至关重要.
研究的目的:
- 为了研究C-ARDS患者输管后早期低血症的决定因素.
- 为了区分解剖学分流和静脉添加剂对低氧症的贡献.
- 探索分流特征和通风策略之间的关系.
主要方法:
- 在输管治疗后1天内对24名C-ARDS患者进行观察性研究.
- CT扫描分析以量化解剖学短路.
- 静脉添加剂的临床测量,以不同的吸入氧 (FiO2) 分数来分离非转移机制.
- 对比静脉添加剂高于解剖间隔的患者与具有平等/较低的患者.
主要成果:
- 在24名患者中的10名患者中,静脉添加剂在50%和100%的FiO2.2时都超过了解剖学分流.
- 这些患者接受了较高的阳性终端呼气压 (PEEP) 呼吸.
- 与另一组相比,他们也表现出较低程度的解剖学突变.
结论:
- 在C-ARDS患者的一个小组中,早期的低氧症可能是由通过有限的解剖间隙进行高 perfusion 驱动的.
- 这挑战了仅仅依赖于V/Q不匹配作为C-ARDS中低氧症的解释.
- 这些发现表明有针对性治疗的潜力,以解决C-ARDS中的输液异常.
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