Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/5385
標題: 儲存條件對口罩過濾效能的影響之探討
The effect of storage conditions on the respirator performance
作者: 游鴻欽
Yu, Hong-Chin
關鍵字: respirator;口罩;storage conditions;respirator performance;fit test;儲存條件;過濾效能;密合度測試
出版社: 環境工程學系所
引用: 參考文獻 ANSI, “ANSI Z88.10 Fit Testing Methods” (2001). Balazy, A., M. Toivola, A. Adhikari, S. Sivasubramani, T. Reponen and S. Grinshpun, “Do N95 Respirators Provide 95% Protection Level Against Airborne Viruses, and How Adequate are Surgical Masks,” American Journal of Infection Control, Vol. 34, pp51-57 (2006). Balazy A., M. Toivola, T. Reponen, A. Podgórski, A. Zimmer and S. A. Grinshpun, “Manikin-Based Performance Evaluation of N95 Filtering-Facepiece Respirators Challenged with Nanoparticles”, Annals of Occupational Hygiene, Vol. 50, pp. 259-269 (2006). Baumgartner, H. P., and F. Loeffler,“The Collection Performance of Electret Filters in the Particle Size Range 0.01μm-10μm,” Journal of Aerosol Science, Vol. 17, pp. 438-445 (1986). Brown, R.C., D. Wake, R. Gray., D. B. Blackford and G. J. Bostock, “Effect of Industrial Aerosols on the Performance of Electrically Charged Filter Material,” Annals of Occupational Hygiene, Vol. 32, pp. 271-294 (1988). Brown, R. C., “Modern Concepts of Air Filtration Applied to Dust Respirators,” Annals of Occupational Hygiene, Vol. 33, pp.615-644 (1989). Brown, R. C., “Air Filtration: An Integrated Approach to the Theory and Applications of Fibrous Filters”, Oxford, New York, pp. 108 (1993). Chen, C. C. and S. H. Huang, “The Effects of Particle Charge on the Performance of a Filtering Facepiece,” American Industrial Hygiene Association Journal, Vol. 59, pp. 227-233 (1998). Chen, C. C., M. Lehtimaki and K. Willeke, “Aerosol Penetration through Filtering Facepieces and Respirator Cartridges,” American Industrial Hygiene Association Journal, Vol. 53, pp. 556-574 (1992). Chen, C. C., M. Lehtimaki and K. Willeke, “Loading and Filtration Characteristics of Filtering Facepiece,” American Industrial Hygiene Association Journal, Vol. 54, pp. 51-60 (1993). Coffey, C. C., D. L.Campbell, W. R.Myers, Z. Zhuang and S. Das, “Comparison of Six Respiratior Fit-Testing Methods with an Actual Measurement of Exposure in a Simulated Health Care Environoment.” American Industrial Hygiene Association Journal, Vol. 59, pp. 852-870 (1998). Coffey, C. C., R.B. Lawrence, Z. Zhuang, D.L. Campbell, P.A. Jensen and W. R. Myers, “Comparison of Five Methods for Fit-Testing N95 Filtering-Facepiece Respiratiors,” Applied Occupational and Environmental Hygiene, Vol. 17, pp. 723-730 (2002). Colton, C. E., “The Impact of Respirator Wear Time on Worker Protection,” Metal Finishing, Vol. 99, pp. 71-75 (2001). Eninger, Robert M., Takeshi Honda, Atin Adhikari, Helvi Heinonen-Tanski, Tina Reponen and Sergey A. Grinshpun, ”Filter Performance of N99 and N95 Facepiece Respirators Against Viruses and Ultrfine Particles”, Ann. Occup. Hyg., Vol. 52, No. 5, pp.385-396, (2008). European Standard EN 149:2001, “Respiratory Protective Devices-Filtering Half Masks to Protect Against Particles-Requirements, testing, marking”. Hinds, W. C., “Aerosol Technology: Properties, Behavior, and Measurement of Airborne Particles,” Second Edition, Wiley, New York, p182-205 (1999). Hsueh P. R., C. H. Hsiao, S. H. Yeh, and W. K. Wang, “Microbiology Characteristics, Serologic Responses, and clinical Manifestations in Severe Acute Respiratory Syndrome, Taiwan,” Emerging Infectious Diseases, Vol.9, pp. 116-3-1167 (2003). Li Y., T. Wong, J. Chung, Y. P. Guo, J.Y. Hu, Y. T. Guan, L. Yao, Q. W. Song and E. Newton, “In Vivo Protective Performance of N95 Respirator and Surgical Facemask,” American Journal of Industrial Medicine, Vol. 49, pp.1056-1065 (2006). Lisa, M., “Brosseau, ScD, CIH university of Minnesota School of Public Health”, IOHA conference, Taiwan (2008). Martin, S. B. Jr. and E.S.Moyer, “Electrostatic Respirator Filter Media: Filter Efficiency and Most Penetrating Particle Size Effects,” Applied Occupational and Environmental Hygiene, Vol. 15, pp. 609-17 (2000). Miles, W. D., “The Velvet-Lined Gas Mask of John Stenhouse,” Armed Forces Chemical Journal, Vol. 12, pp. 24-25 (1958). Moyer, E. S. and G. A. Stevens, “Worst Case Aerosol Testing Parameters: II. Efficiency Dependence of Commercial Respirator Filters on Humidity Pretreatment,” American Industrial Hygiene Association Journal, Vol. 50, pp. 265-270 (1989). NIOSH, “Guide to Industrial Respiratory Protection”, Atlanta, USA (1987). NIOSH, “Code of Federal Regulations: Respiratory Protective Devices. Title 42, Part. 84”, pp. 30336-30404, Atlanta, USA (1995). OSHA, “Respiratory Protection Standard (29 CFR 1910.134)”, New York, USA (1998). Tennal K. B., M. K. Mazumder, A Siag and R. N. Reddy, “Effect of Loading with Aim Oil Aerosol on the Collection Efficiency of an Electret Filter,” Particulate Science and Technology, Vol. 9, pp19-29 (1991). TSI Inc. “CERTITEST Model 8110 Automated Filter Testers Operation and Service Manual”, USA. (1993) TSI Inc, “Model 8095 N-95-CompanionTM to the PORTACOUNT® Plus Operation and Service Manual”, USA. (2005) TSI Inc, “Model 8118A Salt Aerosol Generator Instruction Manual” , USA. (2004) Willeke, K., Y. Qian, J. Donnelly, S. Grinshpun and V.Ulevicius, “Penetration of Airborne Microorganisms through a Surgical Mask and a Dust/Mist Respirator,”. American Industrial Hygiene Association Journal, Vol. 57, pp. 348-355 (1996). Willeke, K., H. E., Ayer and J. D., Blanchard, “New Methods For Quantitative Respirator Fit Test With Aerosols,” American Industrial Hygiene Association Journal, Vol. 42, pp. 121-125 (1981). WHO, “Hospital Infection Control Guidance for Severe Acute Respiratory Syndrome (SARS)”, Geneva, Switzerland (2003). WHO, “WHO Global Influenza Preparedness Plan”, (2005). 陳春萬,張家豪,楊淑晶,黃盛修, “拋棄式口罩密合度測試落實方案探討”,勞工安全衛生研究所季刊,第十六卷,第三期,pp. 304-314(2008)。 黃盛修,陳春萬,葉文裕,“市售防塵口罩濾材對奈米微粒捕集效率研究”,勞工安全衛生研究所季刊,第十二卷,第三期,pp. 264-274(2004)。 劉宣良,許家銘, “口罩與過濾”,科學發展月刊,第三六八期,pp.66-71(2003)。 衛生署疾病管制局,傳染病防制工作手冊,台北,(2008)。 陳春萬,“呼吸防護具使用管理問題探討-奈米微粒洩漏問題及儲存環境之影響研究”,行政院勞工委員會勞工安全衛生研究所期末報告,IOSH94-H308 (2005)。 陳春萬,黃盛修,“拋棄式口罩洩漏因素研究”,行政院勞工委員會勞工安全衛生研究所期末報告,IOSH93-H307(2004)。 陳春萬,“防塵口罩防護效能探討”,行政院勞工委員會勞工安全衛生研究所期末報告,IOSH89-H308 (1999)。 陳志傑,林文印,“防塵呼吸防護具試驗規範研究-濾材對粉塵霧滴之補集效果探討”,勞工安全衛生研究所計畫,IOSH88-H104(1999)。 陳志傑,黃盛修,賴永怡,黃奕孝,“氣懸微粒防護濾材防護機制研究”,工業技術研究院期末報告(1996)。 陳春萬,陳友剛,“勞工頭型與呼吸防護具密合度研究”,行政院勞工委員會勞工安全衛生研究所期末報告,IOSH85-H307 (1996)。 陳春萬,陳友剛,陳志傑,“負壓式半面體口罩密合度測試”,IOSH84-H309,勞工安全衛生研究所期末報告(1995)。 陳春萬,”你帶的口罩有效嗎?”,勞工安全衛生簡訊,第42期,p.p 18(2000) 經濟部標準檢驗局:拋棄式防塵口罩(CNS14755,Z2125),(2003) 美國疾病管制局, http://www.cdc.gov/ncidod/sars/respirators.htm (2003)。 美國疾病管制局, influenza Pandemic Operation Plan, 2005, http://www.cdc.gov/flu/pandemic/ (2005)。 美商3M公司台灣分公司職業安全衛生與環保產品部門網站,http://3m.e-safety.com.tw/ 美商3M公司職業安全衛生與環保產品部門網站, http:// www.3m.com/OccSafety 衛生署疾病管制局,”流感防制網”, http://flu.cdc.gov.tw/ TSI Inc. http://www.tsi.com/en-1033/index.aspx
摘要: 
摘要
N95口罩在大流行傳染病的防護工作中扮演著重要的角色,所以很多國家都已經把N95口罩納入防疫物資的一環,國內衛生單位亦然。所以N95口罩到底能夠存放多久?儲存條件的溫濕度是否會影響口罩效能,也是醫療單位非常關心的問題。因此,本研究在國內首次以存放五年的N95口罩做為研究對象,探討其過濾效能以及口罩密合度的影響,另外也探討溫濕度對口罩過濾效能的影響。
口罩過濾效能的測試係使用自動濾材測試器測試A、B、C、D、E與F六款五年口罩和A、B與C三款新口罩的穿透率和阻抗,另外也分別測試於90°C、-10°C以及常溫下放置24小時後的過濾效率變化。口罩效能的測試是以30 psi的壓力使霧化器將2%氯化鈉水溶液霧化乾燥後,使氯化鈉粒徑呈現在0.07 μm (count median diameter),以流量85 L/min測試口罩的過濾效能。
口罩密合度是使用定量密合度測試組合系統以真人分別配戴三款五年口罩A、B與C和同樣型號新口罩來測試其密合度,測試方法主要是利用差異電移動度分析儀篩選粒徑為40nm的微粒,而N95口罩的特性幾乎可以完全過濾40 nm的微粒,所以口罩內量測到40nm粒徑的微粒可被認定是洩漏造成。
結果顯示,存放五年的口罩其過濾效率有C與E兩款低於95%,分別佔該款口罩的10%和5%。高溫90°C對C口罩的過濾效率和阻抗明顯降低。而口罩密合度方面五年口罩通過率平均41.7%,新口罩通過率平均45%,這表示口罩密合度仍有很大改善空間,所以建議醫護人員第一次使用N95口罩時必須實施口罩密合度測試並選擇適合的口罩。

Abstract
N95 respirators play an important role in epidemic diseases protection. Therefore, many countries have included N95 respirators as epidemic prevention materials, so have domestic public health offices. As a result, how long N95 respirators could be preserved and whether the temperature and humidity in the storage environment would affect the respirator''s performance, have become a concerning issue by medical organizations. Due to these concerns, this research is the first domestic study that used N95 respirators stored for five years as research subject. This research studied effect of the temperature and humidity on the filtration efficiency and the fitness of the respirator.
To test the respirators filtration efficiency, an automatic filter tester was used to test the penetration and pressure drop of six different models of A, B, C, D, E, and F of five-year respirators and three models of A, B, and C of new respirators. In addition, the change of filtration efficiency of the new respirators treated over 24 hours under 90℃, 25℃, and -10℃ was also tested. This test was conducted by automizing a 2% sodium chloride solution by using an atomizer operated under 30 psi to generate the droplets. After drying the droplets, the count median diameter of the particles is 0.07μm. The filtration efficiency of a respirator is tested with the gas flow rate at 85L/min.
To test the respirators fitness, we used quantitative fit test system to measure the fitness of the three models of new respirators worn by real person. The testing method is to use a differential mobility analyzer to select the particles of 40nm in diameter. N95 respirators are capable of filtering out almost all 40nm particles, therefore, the 40 nm particles measured within the respirator would be considered due to the leakage caused by poor fitness.
Base on the experiment of results, it was found that the respirators filtration efficiency of model C and E of five year respirators are lower than 95%, these inefficient respirators accounted for 10% and 5% of model C and E respirators, respectively. High temperature at 90℃ significantly decreased the filtration efficiency and pressure drop of model C respirators. As to the respirator fit test, in average over 50% of testees failed. This implies the tested respirators did not fit the testees. Therefore it is necessary to test the fitness of the respirators of different sizes when the medical personnel first time use an N95 respirator.
URI: http://hdl.handle.net/11455/5385
其他識別: U0005-0602200900004400
Appears in Collections:環境工程學系所

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