戴呼吸器对颗粒物的心血管影响:一个随机交叉试验
Xin Meng1, Meilin Yan2, Meijie Jiang3
1Key Joint Laboratory of Environmental Simulation and Pollution Control, International Joint Laboratory for Regional Pollution Control (IJRC), Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
The Science of the total environment
|June 2, 2023
概括
佩戴N95呼吸器有效过细颗粒物 (PM2.5),但可能对心血管健康产生负面影响,特别是在低污染条件下. 整体健康影响取决于空气污染水平,这表明需要个性化保护策略.
科学领域:
- 环境健康 环境健康
- 心血管生理学心血管生理学
- 呼吸系统保护 呼吸系统保护
背景情况:
- 微粒 (PM2.5) 对心血管健康构成重大风险.
- N95呼吸器被广泛用于颗粒物保护,但它们在现实世界中对心血管的影响尚不清楚.
研究的目的:
- 评估PM2.5暴露期间佩戴N95呼吸器对心血管的影响.
- 了解佩戴呼吸器时对PM2.5暴露的心血管反应的机制.
主要方法:
- 一个随机,双盲交叉试验,涉及52名健康成年人在北京.
- 参与者被暴露在室外的PM2.5中2小时,交替使用真 (过) 和假 (未过) N95呼吸器.
- 测量包括环境PM2.5,呼吸器过效率,心率变化 (HRV),血压和动脉硬.
主要成果:
- 真正的N95呼吸器实现了90.1%的过效率;假呼吸器实现了18.7%.
- 在污染较小的日子里 (PM2.5 < 75μg/m3),与假装使用相比,真正的呼吸器使用与更低的HRV和更高的心率有关.
- 这些差异在严重污染的日子里 (PM2.5 ≥75μg/m3) 不那么明显.
- 在PM2.5中增加10μg/m3与HRV下降2.2-6.4%相关,主要是在暴露后的第一个小时内.
结论:
- N95呼吸器有效降低PM2.5暴露,短期暴露严重影响自主神经功能.
- 呼吸器使用对心血管的影响可能是不利的,并且取决于环境空气污染水平.
- 基于污染水平的呼吸器使用的个性化建议是合理的.
相关概念视频
01:22Cardiopulmonary Resuscitation II: ACLS Airway Management
25
Airway management is a key skill in emergency and critical care settings, as maintaining a clear airway is essential for adequate oxygenation and ventilation.Head Tilt-Chin Lift TechniqueThe head tilt-chin lift maneuver is an essential technique primarily used in patients without suspected cervical spine injuries. To perform this maneuver, one hand is placed on the patient’s forehead, and gentle pressure is applied backward to tilt the head. The fingertips of the other hand are positioned...
25
01:24Respiratory Capacities
857
Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters.
The Functional Residual Capacity (FRC) represents the air in the...
One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters.
The Functional Residual Capacity (FRC) represents the air in the...
857
01:19Respiratory Assessment: Purpose and Indications
1.1K
Respiratory assessment is a cornerstone of nursing assessments, crucial for the early detection of patient deterioration. This evaluation transcends routine procedures, representing a critical skill nurses must master to ensure optimal patient care.
Objectives and Importance:
The primary goal of respiratory assessment is to evaluate patients at early risk of clinical deterioration. Since respiratory distress often precedes other signs of declining health, breathing patterns and sounds become a...
Objectives and Importance:
The primary goal of respiratory assessment is to evaluate patients at early risk of clinical deterioration. Since respiratory distress often precedes other signs of declining health, breathing patterns and sounds become a...
1.1K
01:23Physiological Control of Respiration
2.2K
Introduction
Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
Regulation of Ventilation
The body maintains ventilation by monitoring levels of carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration (pH) in the arterial blood. Among these factors, the level of CO2 plays a crucial...
Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
Regulation of Ventilation
The body maintains ventilation by monitoring levels of carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration (pH) in the arterial blood. Among these factors, the level of CO2 plays a crucial...
2.2K
01:23Acute Respiratory Failure-IV
183
Respiratory failure can manifest suddenly or gradually, characterized by a rapid decline in PaO2 and a rapid rise in PaCO2. This situation indicates a severe respiratory problem that may quickly become a life-threatening emergency. One of the early signs of hypoxemic Acute Respiratory Failure (ARF) is a change in mental status due to the brain's sensitivity to oxygen levels and changes in acid-base balance. Symptoms such as restlessness, confusion, and agitation suggest inadequate oxygen...
183