Publication in refereed journal
香港中文大学研究人员 ( 现职)
| 沈祖尧教授 (内科及药物治疗学系) |
| Professor Tony GIN (麻醉及深切治疗学系) |
| 周家明教授 (建筑学院) |
| 陈德威教授 (麻醉及深切治疗学系) |
| 许树昌教授 (内科及药物治疗学系) |
全文
| 数位物件识别号 (DOI) http://dx.doi.org/10.1378/chest.07-0636 |
引用次数
Web of Sciencehttp://aims.cuhk.edu.hk/converis/portal/Publication/19WOS source URL
Scopushttp://aims.cuhk.edu.hk/converis/portal/Publication/28Scopus source URL
其它资讯
摘要Background: Pneumonia viruses such as influenza may potentially spread by airborne transmission. We studied the dispersion of exhaled air through a simple oxygen mask applied to a human patient simulator (HPS) during the delivery of different oxygen flow in a room free of air currents. Methods: The HPS represented a 70-kg adult male individual in a semi-sitting position on a hospital bed inclined at 45°. A simple oxygen mask was fitted to the HPS in the normal fashion. The head, neck, and internal airways of the HPS were configured to allow realistic airflow modeling in the airways and around the face. The HPS was programmed to breathe at a respiratory rate of 14 breaths/min with a tidal volume of 0.5 L. Airflow was marked with intrapulmonary smoke for visualization. A leakage jet plume was revealed by a laser light-sheet, and images were captured by high-resolution video. Smoke concentration in the exhaled plume was estimated from the total light intensity scattered by smoke particles. Findings: A jet plume of air leaked through the side vents of the simple oxygen mask to lateral distances of 0.2, 0.22, 0.3, and 0.4 m from the sagittal plane during the delivery of oxygen at 4, 6, 8, and 10 L/min, respectively. Coughing could extend the dispersion distance beyond 0.4 m. Conclusion: Substantial exposure to exhaled air occurs generally within 0.4 m from patients receiving supplemental oxygen via a simple mask. Health-care workers should take precautions when managing patients with community-acquired pneumonia of unknown etiology that is complicated by respiratory failure.
着者Hui D.S., Hall S.D., Chan M.T.V., Chow B.K., Ng S.S., Gin T., Sung J.J.Y.
期刊名称Chest
详细描述2007.
出版年份2007
月份8
日期1
卷号132
期次2
出版社Elsevier Inc.
出版地United States
页次540 - 546
国际标準期刊号0012-3692
语言英式英语
关键词Dispersion, Exhaled air, Influenza, Oxygen therapy, Severe acute respiratory syndrome
