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Year : 1991  |  Volume : 9  |  Issue : 4  |  Page : 202-206

Air Microbial Counts In Neurosurgical Operation Theatre (Conventional Ventilation VS Laminar Flow)



Correspondence Address:
Geeta Mehta


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Source of Support: None, Conflict of Interest: None


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The quantity and types of settling micro-organisms in two neurosurgical operating theatres were compared over a period of ten months. One theatre had conventional exhaust ventilation whereas in the other a laminar air flow unit was fitted. Settle plate counts in the conventionally ventilated theatre were over ten times higher than the counts in the theatre protected by laminar air flow (mean 13.95 and 1.21 fct/ft /min respectively). A variety of micro-organisms were isolated under conventional ventilation while under laminar air flow the organisms were mainly to the coagulase negative staphylococci and diphtheroids. At the resting stage, the number of setting organisms was low under both types of ventilation, However, as activity in the theatre progressed the level of contamination rose sharply to unacceptable levels in the conventionally ventilated theatre. The stage of activity did not influence the level of air contamination in the theatre with laminar air flow ventilation.






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2004 - Indian Journal of Medical Microbiology
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