呼出气溶和二氧化碳排放在呼吸活动中的关系
Benjamin Moseley1, Justice Archer2, Christopher M Orton1,3,4
1Department of Respiratory Medicine, Royal Brompton Hospital, London SW3 6NP, U.K.
Environmental science & technology
|August 13, 2024
概括
呼出的二氧化碳 (CO2) 是呼吸道颗粒排放的糟糕指标,在发声活动,如说话. 发声的声音,而不是CO2水平,主要是驱动颗粒的释放,影响疾病传播风险.
科学领域:
- 环境健康 环境健康
- 呼吸系统科学 呼吸系统科学
- 传染病传播 传染病传播
背景情况:
- 呼吸道颗粒是病原体的主要传播途径.
- 发声活动会产生呼吸道颗粒,但与呼出的二氧化碳的关系尚不清楚.
- 了解颗粒物排放对于评估各种环境中疾病传播风险至关重要.
研究的目的:
- 在不同的人类活动中同时测量呼出的二氧化碳 (CO2) 和呼吸道颗粒排放.
- 评估二氧化碳指标 (VCO2, VE) 与非声声和声声活动中的颗粒物排放率之间的相关性.
- 为了确定呼出的二氧化碳作为估计呼吸道颗粒排放的替代品的可靠性.
主要方法:
- 同时测量排气二氧化碳 (VCO2) 量和每分钟通风 (VE) 与呼吸道颗粒数量.
- 参与者进行了非语音活动 (休息时呼吸,运动) 和语音活动 (说话,唱歌).
- 分析二氧化碳参数与粒子数量/质量排放率之间的相关性.
主要成果:
- 二氧化碳和通风趋势与非vocalized 运动期间的粒子度密切匹配.
- 在非vocalized活动期间,在CO2和粒子排放之间观察到强烈的相关性 (r=0.81为数,r=0.84为质量).
- 在发声过程中发现了弱相关性 (r=0.34为数量,r=0.12为质量),表明噪音是粒子发射的主要驱动因素.
结论:
- 呼出的二氧化碳是估计发声期间呼吸道颗粒排放的糟糕替代品.
- 在现实世界中,发声的声音是控制呼吸道颗粒排放的主要因素.
- 室内二氧化碳监测可能会低估呼吸道颗粒度和疾病传播风险.
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