Assessing a Novel Method to Reduce Anesthesia Machine Contamination: A Prospective, Observational Trial

Author:

Biddle Chuck J.12,George-Gay Beverly1ORCID,Prasanna Praveen12,Hill Emily M.3,Davis Thomas C.12,Verhulst Brad4

Affiliation:

1. Department of Nurse Anesthesia, Virginia Commonwealth University, Richmond, VA, USA

2. Department of Anesthesiology, Virginia Commonwealth University Medical Center, Richmond, VA, USA

3. Department of Clinical Lab Sciences, Virginia Commonwealth University, Richmond, VA, USA

4. Department of Psychology, Michigan State University, East Lansing, MI, USA

Abstract

Background. Anesthesia machines are known reservoirs of bacterial species, potentially contributing to healthcare associated infections (HAIs). An inexpensive, disposable, nonpermeable, transparent anesthesia machine wrap (AMW) may reduce microbial contamination of the anesthesia machine. This study quantified the density and diversity of bacterial species found on anesthesia machines after terminal cleaning and between cases during actual anesthesia care to assess the impact of the AMW. We hypothesized reduced bioburden with the use of the AMW. Methods. In a prospective, experimental research design, the AMW was used in 11 surgical cases (intervention group) and not used in 11 control surgical cases. Cases were consecutively assigned to general surgical operating rooms. Seven frequently touched and difficult to disinfect “hot spots” were cultured on each machine preceding and following each case. The density and diversity of cultured colony forming units (CFUs) between the covered and uncovered machines were compared using Wilcoxon signed-rank test and Student’s t-tests. Results. There was a statistically significant reduction in CFU density and diversity when the AMW was employed. Conclusion. The protective effect of the AMW during regular anesthetic care provides a reliable and low-cost method to minimize the transmission of pathogens across patients and potentially reduces HAIs.

Funder

American Association of Nurse Anesthetists

Publisher

Hindawi Limited

Subject

Infectious Diseases,Microbiology (medical)

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