环氧乙烷(ETO)灭菌器附加局部排气通风系统的评价

D. J. Caldwell
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引用次数: 1

摘要

在美国陆军医疗中心对高环氧乙烷(ETO)暴露的后续研究中,对附加的局部排气通风(LEV)系统作为工程控制措施进行了评估。收集基线呼吸区和一般区域样本以表征ETO暴露,并评估现有的一般通气。被eto污染的空气由空调系统再循环回灭菌区。这种再循环,加上灭菌器区域的正差压,导致ETO迁移到其他区域。一般区域样本结果的时间加权平均值为0.95至2.80 ppm,峰值实时暴露大于50 ppm。呼吸区样本结果超过职业安全与健康管理局行动水平的10个人中有9人(如果对样本结果应用较低置信限{LCL},则10人中有7人),暴露于ETO浓度高于PEL的5个人(3人高于t…
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Evaluation of an Add-on Local Exhaust Ventilation System for an Ethylene Oxide (ETO) Sterilizer
Abstract An add-on local exhaust ventilation (LEV) system was evaluated as an engineering control measure during a follow-up study of high ethylene oxide (ETO) exposures at a U.S. Army medical center. Baseline breathing zone and general area samples were collected to characterize ETO exposure, and existing general ventilation was evaluated. ETO-contaminated air was recirculated back to the sterilizer area by the air-conditioning system. This recirculation, coupled with a positive differential air pressure in the sterilizer area, caused the ETO to migrate to other areas. General area sample results ranged from 0.95 to 2.80 ppm as a time-weighted average, with peak real-time exposures greater than 50 ppm. Breathing zone sample results exceeded the Occupational Safety and Health Administration action level for nine of ten individuals sampled (7 of 10 if the lower confidence limit {LCL} is applied to the sample results), with five individuals exposed to ETO concentrations greater than the PEL(3 greater than t...
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