当使用冲洗速率氧气时,到足够的氧化前时间
Alec J Bunting1, Brian E Driver1, Andrew M Pearson1
1Department of Emergency Medicine, Hennepin County Medical Center, Minneapolis, MN 55404, USA; Department of Emergency Medicine, University of Minnesota Medical School, Minneapolis, MN 55455, USA.
在冲洗速度的氧气下,使用非反呼吸面具 (NRB) 达到充足的氧化前期,平均需要90秒. 这项研究表明,3分钟是紧急气道管理中有效的氧化前期的合理目标时间.
科学领域:
- 紧急医疗 紧急医疗
- 呼吸系统生理学 呼吸系统生理学
背景情况:
- 在紧急气道管理中,非再呼吸 (NRB) 面具在最大流速时预氧化是常见的.
- 目前对3分钟氧化前的指导是基于在紧急情况下不典型的设备.
研究的目的:
- 用NRB面膜用冲洗率氧气来确定充足的氧化前期的中位时间.
- 为了评估NRB面具在模拟紧急环境中预氧化的有效性.
主要方法:
- 健康的志愿者接受了5分钟的氧化前试验,使用NRB口罩和冲洗率氧气.
- 潮末氧气 (EtO2) 每15秒测量一次,充足的氧化前值定义为EtO2 ≥85%.
主要成果:
- 达到85%的EtO2的中位时间是90秒 (IQR 60-135s).
- 所有50名参与者均达到EtO2>80%,平均EtO2的最大值为87%.
- 在3分钟后,86%的参与者达到适当的氧化前水平.
结论:
- 使用带有冲洗率氧气的NRB口罩进行充分的氧化前期的中位时间为90秒.
- 86%的健康参与者在3分钟内实现了足够的氧化前.
- 在这种方法中,三分钟似乎是一个合理的氧化前目标时间.
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