Tool for Evaluation of Vaporized Hydrogen Peroxide Disinfection of N95 Masks in Rooms

The SARS-CoV-2 virus has put a strain on the supply and distribution of N95 masks, with some hospitals electing to reuse masks after disinfection. Currently, vaporized hydrogen peroxide (VHP) mask disinfection systems are being deployed at multiple locations throughout the United States, for example in shipping containers and in small rooms. Such enclosures will be of a different size, have different surface materials and have varying air change rates; all these parameters will impact the VHP dose that the masks receive. This spreadsheet tool can be used to estimate the VHP concentration in air of such a room. The tool employs a single-zone mass balance analysis that accounts for room size, VHP losses to surfaces and air change rate. This tool is intended to support VHP disinfection efforts by providing estimates of VHP concentrations in the room being employed, but it does not describe or provide guidance on VHP disinfection applications.新型冠状病毒（SARS-CoV-2）给N95口罩的供应与配送带来了沉重压力，部分医院选择在消毒后重复使用该类口罩。当前，汽化过氧化氢（Vaporized Hydrogen Peroxide, VHP）口罩消毒系统已在美国多地部署，例如在海运集装箱及小型房间中。此类封闭空间的尺寸、表面材质与换气率均存在差异，上述所有参数均会影响口罩所接收的VHP剂量。本电子表格工具可用于估算此类空间内空气中的VHP浓度，其采用单区域质量平衡分析方法，可纳入空间尺寸、表面对VHP的损耗以及换气率等参数。本工具旨在通过估算当前使用空间内的VHP浓度，为VHP消毒工作提供支持，但并未对VHP消毒应用场景作出说明或提供操作指导。