Background
The aim of this study was to evaluate the performance of a focused multivector ultraviolet
(FMUV) system employing shadowless delivery with a 90-second disinfection cycle for
patient care equipment inside and outside the operating room (OR) suite without manual-chemical
disinfection.
Methods
A 5-point multisided sampling protocol was utilized to measure the microbial burden
on objects inside and outside the OR environment in a 3-phase nonrandomized observational
study. Surface sampling was performed pre- and postdisinfection in between cases (IBCs)
to assess the performance of manual-chemical disinfection. FMUV system performance
was separately assessed pre- and postdisinfection before the first case and IBCs.
Additionally, visibly clean high-touch objects were sampled outside the OR, and the
microbial burden reductions after FMUV disinfection were quantified without manual-chemical
disinfection.
Results
Manual-chemical disinfection reduced the active microbial burden on sampled objects
IBCs by 52.8%-90.9% (P < .05). FMUV reduced the active microbial burden by 92%-97.7% (P < .0001) before the firstcase and IBCs combined, and 96.3%-99.6% (P < .0001) on objects outside the OR without chemical disinfection.
Conclusions
Five-point multisided sampling proved effective for assessing disinfection performance
on all exterior sides of equipment. FMUV produced significant overall reductions of
the microbial burden on patient care equipment in all study phases and independent
of manual cleaning and chemical disinfection.
Key Words
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Article info
Publication history
Published online: November 27, 2018
Footnotes
Funding/support: This study was supported by Northwell Ventures.
PurpleSun Inc received grant support from Health 2.0 and New York City Economic Development Corporation.
Conflicts of interest: PurpleSun is a portfolio company of Northwell Ventures.
T.J.W. and V.P. are paid advisors to PurpleSun, and the fees will go to Weill Cornell Medicine.
Identification
Copyright
© 2018 Association for Professionals in Infection Control and Epidemiology, Inc. Published by Elsevier Inc. All rights reserved.
