隔离病房隔离效果的研究（2）
Study on isolation effects of isolation wards (2)
摘要：
分析了国外文献中对压差作用的认识和压差设定值。分别用大气尘法和实验菌种法对压差和污染物外泄量的关系进行了实验研究，结果显示压差从0变到-6 Pa，污染物外泄浓度比仅减少0.03左右；而从-6 Pa变到-30 Pa，污染物外泄浓度比基本不变。建议隔离病房相对缓冲室的压差设定为-5 Pa。
Abstract：
Analyses the cognition to pressure difference function and the pressure difference values recommended in foreign literatures. Experimentally studies the relation of the pressure difference and leakage rate of contaminations separately by atmospheric dust method and experimental culture method. The results show that the leakage concentration ratio of contaminations decreases about 0.03 when the pressure difference changes from 0 to -6 Pa and that the leakage concentration ratio almost keep the same value when the pressure difference changes from -6 Pa to -30 Pa. Recommends the pressure difference value of -5 Pa.
Keywords:isolation ward, isolation effect, pressure difference, atmospheric dust, experimental culture, leakage concentration ratio of contamination