Abstract
Contamination of operating room air by bacterial organisms fluctuates in direct relationship to human activity in a given operating room. In a three-year study period, an overall clean wound infection rate of 3.14% occurred. Air contamination in operating rooms varied between 1.5 and 18.3 microorganisms per cubic foot, depending on the human activity present. The peak incidence of microorganisms in the air of our operating rooms was between 8:00 a.m. and 11:00 a.m. There was a precipitous rise of organisms as personnel began activity, and a rapid drop in afternoon hours as personnel activity diminished. Concentrations of pathogenic organisms in the air of operating rooms is small, but their presence is without question. Airborne pathogens can and do contaminate and occasionally infect the clean surgical wound. Traffic control in operating rooms appears to be a valid recommendation based on this study.
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