Product and standard overview of biosafety isolating equipment—IVC and field test results

According to the actual demand of IVC field test for high-level biosafety laboratory, analyses the existing IVC field test methods and evaluation standards, and presents the survey results of field test and check of IVC performance indices. The results show that the products of overseas brands are widely used in laboratory while some domestic brands involve in, the air change rates of different IVCs range from 20 to 100 times per hour or even more, without insufficient air change rate, about nine percent of IVCs fail to meet the standard requirement on pressure difference and about four percent of measured IVCs fail to meet the requirement on air tightness in RB/T 199-2015.  Now, the on-site leakage detection of HEPA filters for air supply and exhaust of IVC mainly adopts total efficiency method, but photometer total efficiency leakage detection can avoid the influence of downstream fan dust, with a bright application prospect.