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目的比较汽化过氧化氢(VHP)和过氧化氢气溶胶喷雾两种技术对救护车内空气和物体表面消毒的效果。方法 3辆救护车随机分成实验A、B组和对照组,均放入嗜热脂肪芽孢和枯草杆菌黑色变种芽孢染菌钢片载体,按《消毒技术规范》要求,实验A组采用VHP消毒,实验B组采用过氧化氢气溶胶喷雾消毒,对照组不采取任何消毒处理,比较VHP和气溶胶喷雾两种消毒技术对救护车医疗舱消毒浓度、消毒时间、消毒剂残留和杀灭对数值。结果 VHP发生器完成一次消毒需要30 min,空间过氧化氢残留值为0.71 mg/m3;对枯草杆菌黑色变种芽孢、嗜热脂肪杆菌芽孢的杀灭对数值均>6。过氧化氢气溶胶喷雾完成一次消毒需要90 min,空间过氧化氢残留值为12.78 mg/m3,对枯草杆菌黑色变种芽孢、嗜热脂肪杆菌芽孢的平均杀灭对数值分别为1.03和0.80。结论与过氧化氢气溶胶喷雾技术相比,VHP消毒技术具有更强的杀孢子能力、消毒周期短、几乎无有毒残留物等优点。
Objective To compare the effects of vaporization of hydrogen peroxide (VHP) and hydrogen peroxide aerosol spray on the surface of air and objects in ambulances. Methods Three ambulances were randomly divided into experimental group A and group B, and control group. Bacillus stearothermophilus and Bacillus subtilis were inoculated into the spore-coated steel plate carrier. According to the Technical Specifications for Sterilization, group A was treated with VHP, In group B, hydrogen peroxide aerosol spray disinfection was used. In the control group, no disinfection was taken. The disinfection concentration, disinfection time, disinfectant residue and kill logarithm of ambulance medical cabin were compared between the two kinds of disinfection techniques of VHP and aerosol spray. Results It took 30 min for VHP generator to complete one sterilization and 0.71 mg / m3 for hydrogen peroxide in space. The kill logarithm for Bacillus subtilis and Bacillus stearothermophilus were all> 6. Hydrogen peroxide aerosol spray to complete a disinfection takes 90 min, the space hydrogen peroxide residue value of 12.78 mg / m3, the average Bacillus subtilis spores, Bacillus stearothermophilus kill logarithmic values were 1.03 and 0.80. Conclusions Compared with hydrogen peroxide aerosol spray technology, VHP disinfection technology has the advantages of stronger sporicidal ability, short sterilization cycle and almost no toxic residue.