| 何耀,邢玉斌,倪彬,姜勇,索继江,钟光林,常青,姜斌.经排风系统传播SARS可能性的示踪气体实验研究[J].中华流行病学杂志,2005,26(1):33-35 |
| 经排风系统传播SARS可能性的示踪气体实验研究 |
| Hypothesis on generating and tracer gas study regarding transmission of severe acute respiratory syndrome through ventilation system in a general hospital |
| 收稿日期:2004-02-10 出版日期:2014-09-15 |
| DOI： |
| 中文关键词: 严重急性呼吸综合征 示踪剂 传播途径 |
| 英文关键词: Severe acute r espiratory syndrome Tr acer Route of transmission |
| 基金项目:全军非典型肺炎防治重大科技基金资助项目(03F0201) |
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| 中文摘要: |
| 目的测定和分析某医院住院部病房楼空气流向及其与排风管道分布的关系并探讨和验证严重急性呼吸综合征(SARS)在医院感染可能的传播途径和影响因素。方法在某医院住院部SARS输入病例所在病房卫生间燃放植物油熏香(示踪气体);为控制病房卫生间排风扇的开启、顶层抽风机的状态和病房新风系统等主要影响因素,共设计了6种实验状态。由4组实验员分别盲法到各楼层的4、5号病房采集、测量空气样本,并分别按10等分记分法评估其气味浓度。结果在医院住院部8～13层的各病房均检测到示踪气体,在不同实验状态下,气体弥散的方向和浓度不尽相同。结论医院目前的建筑结构和通风系统具备了病原体气溶胶自下而上经排风管道垂直传播的通道和空气动力学条件,示踪气体的分布与发病分布有一定的关联性。提示SARS存在气溶胶或其他载体形式长距离传播的可能性和证据,而在现有设施条件下,针对性的预防管理措施可在一定程度上阻断病原体经排风系统的传播。 |
| 英文摘要: |
| Objective?? By measuring airflow and ventilation distributio n of w ar d building, to explore and verify the hypothesis of airbor ne transmission and risk factor o f severe acute respir ator y syndrome ( SARS) nosocomial infectio n. Methods?? T racer gas ( perfume of plant oil) was emitted to the bathroom of w ards w hen SARS index patient liv ed. Six different ex perimental situations were designed to co ntrol the status of exhaust fan in bathrooms, ex haust fan in the top of building and fresh air exchange system. The concentr at ion of perfume was separat ely measured by 4 groups o f lab workers and recorded blindly by the scores of ?? tent h degree?? . Results?? Tracer gas was detected from the wards of 8th to 13th floor. Conclusion Architecture and v entilation system of the inpatient building in the hospital contr ibuted to the aerodynamic condition of SARS nosocomial infection t hrough airborne tr ansmission. The distribution of tracer gas in the w ards was associated with SARS patients in this building . It w as possible that SARS could have been t ransmitted to for distance by aerosol or other carriers. |
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