研究生物气溶的迁移特征和负压隔离病房的通风模式的优化,考虑不同患者的姿势
Dieen Wu1, Jianji Chen1, Xihua Fu1
1Guangzhou Panyu Central Hospital, Guangzhou, China.
PloS one
|August 17, 2023
概括
优化负压隔离病房通风可以显著减少空气中的传染性生物气溶. 改进的空气流模式和排气安排可以将气溶的度降低95%以上,降低卫生保健工作者和患者的感染风险.
科学领域:
- 环境卫生工程 环境卫生工程
- 传染病控制和控制传染病
- 计算流体动力学 (CFD) 是一种计算流体动力学.
背景情况:
- 病毒传染病构成全球威胁,需要改善室内空气质量,以防止生物气溶传播.
- 负压隔离病房对于制传染性气溶至关重要,但对空气流和扩散的知识有限.
- 由于对气溶行为的理解不足,医疗保健工作者 (HCW) 和患者之间的交叉感染风险很高.
研究的目的:
- 调查隔离病房中的生物气溶的时空特征和分散模式.
- 分析不同通风模式和患者姿势对气溶分布的影响.
- 优化通风策略,以提高生物气溶的制能力,降低感染风险.
主要方法:
- 使用计算流体动力学 (CFD) 模拟来建模空气流和生物气溶分散.
- 多样化的通风布局和模拟的患者姿势 (仰卧,坐着) 来评估气溶的行为.
- 在不同的场景下,量化喷雾剂度,去除效率和表面沉积率.
主要成果:
- 患者的身体位置显著影响生物气溶释放源的位置和随后的分布.
- 优化的排气装置大大降低了躺着和坐着的气溶的度 (>95%的清除效率).
- 在病房表面,特别是患者和病床上的气溶沉积被最小化 (<1%),减少了直接接触感染途径.
结论:
- 通风优化在减轻负压隔离病房内的空气传染性生物气溶方面非常有效.
- 对通风布局的战略调整和对患者姿势的考虑对于感染控制至关重要.
- 改善的通风可以显著降低患者和医护人员感染传播的风险.
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