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The Effect of a Portable Hepa-Filtered Body Exhaust System on Airborne Microbial Contamination in a Conventional Operating Room

Published online by Cambridge University Press:  02 January 2015

William W. Bohn ,
David S. McKinsey ,
Mark Dykstra  and
Susan Koppe
William W. Bohn
Affiliation:
Orthopedic Surgery, Research Medical Center Consulting Faculty, University of Missouri at Kansas City School of Medicine
David S. McKinsey
Affiliation:
Infectious Diseases, Research Medical Center, University of Missouri at Kansas City School of Medicine
Mark Dykstra
Affiliation:
Pathology, Research Medical Center, University of Missouri at Kansas City School of Medicine
Susan Koppe
Affiliation:
Orthopedic Surgery, Research Medical Center, University of Missouri at Kansas City School of Medicine
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Abstract

Objective: To study the effect of a portable HEPA-filtered air exhaust system (Stackhouse Freedom Surgical Helmet System) on airborne microbial contamination in a modern conventional operating room.

Design and Setting: Microbial air sampling was done with a two-stage Anderson sampler at the wound site during 46 total joint replacements. All operations were performed by the same surgeon in the same operating room at a large community hospital.

Results: In 18 cases done without air exhaust hoods, the number of bacterial and fungal colony-forming units (CFU) ranged from 0.6 to 11.7 (mean, 3.6). Air sampling during 28 operations with the operating team in air exhaust hoods revealed a mean of 3.6 CFU (range, 0 to 11.4). Bacterial CFU averaged 3.4 without hoods and 3.2 with exhaust hoods. Coagulase-negative staphylococci were the most common isolates (48% of isolates with hood, 55% without hood). No infections occurred.

Conclusion: We conclude that these air exhaust hoods did not lower airborne microbial contamination detectable with this air sampling method, as compared to standard head cover and mask, in a modern conventional operating room.

Type
Original Articles
Information
Infection Control & Hospital Epidemiology , Volume 17 , Issue 7 , July 1996 , pp. 419 - 422
Copyright
Copyright © The Society for Healthcare Epidemiology of America 1996

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