Mobile zoned/exponential LAF screen - a promising new concept in ultra-clean air technology for additional operating room ventilation

A new concep t in the fo rm of a mobi le sc reen (0 .5 x 0 .4 m) produc ing u l t ra -c lean exponent ia l LAF (a i r f low cent ra l zone 0 .6 m/s and pe r iphera l zone 0 .4 m/s) was inves t iga ted as an addi t ion to convent iona l turbulent /mix ing opera t ing room vent i l a t ion . The evalua t ion was per formed dur ing s t r ic t ly s tandard ised sham opera t ions re f lec t ing condi t ions dur ing major surgery . The s tudy consi s ted of a p i lo t exper iment (n 2 ) des igned to g ive h igh counts o f sediment ing ae rob ic colony fo rming uni t s . In a second main s tudy (n 10) , record ing dus t pa r t ic le s , a i r -borne and sediment ing ae rob ic c fu the sc reen was chal lenged wi th opt imal opera t ing room c lo th ing .