Abstract
The air cleanliness is an important problem for preventing infection in operating room. The purpose of this study is to find out the integrated characteristic of air cleanliness through the simultaneous measurement of concentration over different particles sizes. The integration of air cleanliness is made by PCA (Principal Component Analysis) method for concentrations over particle sizes. The surveys are conducted in surgical center of a university hospital and 4 types of operating rooms are selected for measurement. Concentrations over 5 different particles sizes are measured by 7 optical particle counters simultaneously at following measuring points ; a point near operative field, 4 points near surgical doctors, and 1 point at exhaust. The results are as follows : 1. The PCA is useful method in evaluation of operating room cleanliness. 2. From the result of PCA, it is extracted that 1st pricipal component means level of contamination and 2nd principal componenet means characteristic of contamination.
