1708. Inter-hospital Variation in Time Required for Hospital Room Ultraviolet (UV)-C Irradiation: Preliminary Experience from the Benefits of Enhanced Terminal Room (BETR) Disinfection Study
Session: Poster Abstract Session: Role of the Healthcare Environment in HAIs
Saturday, October 5, 2013
Room: The Moscone Center: Poster Hall C
  • Tru-D times poster FINAL 9-25-13.pdf (485.5 kB)
  • Background:  “No touch” room decontamination techniques such as UV-C irradiation are used increasingly to improve the effectiveness of room cleaning but pose implementation challenges.  We herein describe preliminary experience from the use of UV-C emitting devices in an ongoing multicenter interventional study.

    Methods:   Eight hospitals used 1-4 automated UV-C emitting devices (Tru-D SmartUVCÔ; Lumalier Corporation) from 5/1/12-4/1/13.  Trained environmental services (EVS) personnel at each hospital followed specific protocols to operate the UV-C devices.  One of two UV-C dose cycles was used: 12,000 µWs/cm2 for vegetative bacteria or 22,000 µWs/cm2 for spores.  Automated UV-C devices measured the delivered doses of UV-irradiation before automatically turning off.  EVS personnel recorded irradiation run times and whether or not the cycle was interrupted.  Differences in run times across hospitals were compared using factorial ANOVA.

    Results:   A total of 9,935 rooms were irradiated using the UV-C emitting devices during the 11-month study period.  The median run time per room was 33 minutes (IQR 25-44).  Run times varied significantly among study hospitals (p<0.001, Figure 1).  7,709 (78%) rooms were irradiated using the vegetative bacteria cycle; 1,309 (13%) rooms were irradiated using the spore cycle. Cycle type was not recorded for 917 (9%) rooms.  The median run time for the vegetative bacteria cycle was 31 minutes (IQR 24.5-41).  The median time for the spore cycle was 52 minutes (IQR 39-66).  Run times varied significantly among study hospitals for both vegetative (p<0.001) and spore cycles (p<0.001). 

    Conclusion:   The cycle time to complete UV-C decontamination varied between hospitals.  Time variation was likely related to differences in the amount and type of materials in rooms and room design, layout, and size.  These data illustrate that UV-C emitters without built-in programs to measure the total dose of irradiation may either under or overestimate the time necessary to adequately disinfect patient rooms.  

    Description: H:\Studies\Scientific Meetings\ID Week 13\Tru-D run times -DJA\Box plot-figure 1 with title.tif


    Deverick J. Anderson, MD, MPH1,2, William Rutala, PhD, FSHEA3, Lauren Knelson, MSPH2, Rebekah W. Moehring, MD, MPH1,2, Luke F. Chen, MBBS, MPH, CIC, FRACP1,4, David J. Weber, MD, MPH, FIDSA, FSHEA3, Daniel J. Sexton, MD, FIDSA1,4 and the CDC Prevention Epicenters Program, (1)Duke Infection Control Outreach Network, Durham, NC, (2)Division of Infectious Diseases, Duke University Medical Center, Durham, NC, (3)Department of Hospital Epidemiology, University of North Carolina Health Care, Chapel Hill, NC, (4)Duke University Medical Center, Durham, NC


    D. J. Anderson, None

    W. Rutala, None

    L. Knelson, None

    R. W. Moehring, None

    L. F. Chen, None

    D. J. Weber, Pfizer: Consultant and Speaker's Bureau, Consulting fee and Speaker honorarium
    Merck: Consultant and Speaker's Bureau, Consulting fee and Speaker honorarium

    D. J. Sexton, None

    Findings in the abstracts are embargoed until 12:01 a.m. PST, Oct. 2nd with the exception of research findings presented at the IDWeek press conferences.