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首页> 美国卫生研究院文献>Pathogens >Microbiological Air Quality in Heating Ventilation and Air Conditioning Systems of Surgical and Intensive Care Areas: The Application of a Disinfection Procedure for Dehumidification Devices
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Microbiological Air Quality in Heating Ventilation and Air Conditioning Systems of Surgical and Intensive Care Areas: The Application of a Disinfection Procedure for Dehumidification Devices

机译：外科和重症监护区供暖通风和空调系统中的微生物空气质量：除湿设备的消毒程序的应用

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International literature data report that the increase of infectious risk may be due to heating, ventilation and air conditioning (HVAC) systems contaminated by airborne pathogens. Moreover, the presence of complex rotating dehumidification wheels (RDWs) may complicate the cleaning and disinfection procedures of the HVAC systems. We evaluated the efficacy of a disinfection strategy applied to the RDW of two hospitals’ HVAC systems. Hospitals have four RDW systems related to the surgical areas (SA1 and SA2) and to the intensive and sub-intensive care (IC and sIC) units. Microbiological air and surface analyses were performed in HVAC systems, before and after the disinfection treatment. Hydrogen peroxide (12%) with silver ions (10 mg/L) was aerosolized in all the air sampling points, located close to the RDW device. After the air disinfection procedure, reductions of total microbial counts at 22 °C and molds were achieved in SA2 and IC HVAC systems. An Aspergillus fumigatus contamination (6 CFU/500 L), detected in one air sample collected in the IC HVAC system, was eradicated after the disinfection. The surface samples proved to be of good microbiological quality. The results suggest the need for a disinfection procedure to improve the microbiological quality of the complex HVAC systems, mostly in surgical and intensive care areas.
机译：国际文献数据报告，传染风险增加可能是由于被空气传播的病原体污染的供暖，通风和空调（HVAC）系统所致。此外，复杂的旋转除湿轮（RDW）的存在可能会使HVAC系统的清洁和消毒程序复杂化。我们评估了将消毒策略应用于两家医院的HVAC系统的RDW的功效。医院有四个与手术区域（SA1和SA2）以及重症监护室和亚重症监护室（IC和sIC）有关的RDW系统。在消毒处理之前和之后，在HVAC系统中进行微生物空气和表面分析。在靠近RDW设备的所有空气采样点中，雾化了含银离子（10 mg / L）的过氧化氢（12％）。经过空气消毒程序后，在SA2和IC HVAC系统中，在22°C和霉菌下，总微生物数量减少了。消毒后，根除在IC HVAC系统中收集的一个空气样本中检测到的烟曲霉污染（6 CFU / 500 L）。表面样品被证明具有良好的微生物质量。结果表明，需要进行消毒程序以改善复杂的HVAC系统的微生物质量，这种情况主要发生在外科和重症监护区域。

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