量化策略,以最大限度地减少牙科诊所的气溶分散
Shamudra Dey1, Maryam Tunio2, Louis C Boryc2
1Joint Department of Biomedical Engineering, Marquette University, Medical College of Wisconsin, Milwaukee, 53226 USA.
概括
牙科气溶缓解策略,如通风和吸气,可以有效地减少空气中的颗粒. 这项研究量化了它们的效率,显示了最佳的流速和缩短的擦洗时间,以提高患者对COVID-19等疾病的安全性.
科学领域:
- 环境健康 环境健康
- 牙科公共卫生 牙科公共卫生
- 传染病控制和控制传染病
背景情况:
- 产生气溶的牙科手术对传播空气传播疾病,包括COVID-19的风险很大.
- 现有的缓解策略,如通风,HEPA过和口外吸,需要进一步优化,以获得最大的效果.
- 关键的未回答问题涉及最佳设备流速和牙科环境中安全的患者周转时间.
研究的目的:
- 用计算流体动力学 (CFD) 来量化牙科诊所各种气溶减缓策略的有效性.
- 为了确定室内通风,HEPA过和口外吸管设备的最佳参数.
- 确定降低气溶度95%所需的"洗时间".
主要方法:
- 计算流体动力学 (CFD) 模拟用于模拟气溶分散和缓解.
- 在模拟牙科钻孔过程中,用于量化气溶度的微粒小于10微米 (PM10).
- 模拟包括一个15分钟的程序,然后在不同的缓解场景下休息30分钟.
主要成果:
- 如果没有缓解,PM10达到30μg/m3,然后慢慢下降. 增加通风 (6.3到18 ACH) 将擦洗时间从20分钟缩短到5分钟.
- HEPA过 (8到20 ACH) 减少了从10到1分钟的擦洗时间.
- 额外口腔吸收装置在超过400L/分钟的流量下显示100%的颗粒捕获.
结论:
- 气溶缓解策略显著降低了牙科环境中的空气中的颗粒度.
- 优化通风,HEPA过和额外口腔吸气对于最小化疾病传播风险至关重要.
- 调查结果提供了基于证据的指导,用于加强牙科诊所对空气传播病原体的安全协议.
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