511. Next-Generation UV: Evaluation of a Robotic Ultraviolet-C Room Disinfection Device
Session: Poster Abstract Session: HAI: The Environment
Thursday, October 5, 2017
Room: Poster Hall CD
  • Moonbeam ID Week 2017 final.pdf (1.2 MB)
  • Background: Mobile ultraviolet-C (UV-C) light room decontamination devices are commonly used as an adjunct to standard cleaning in healthcare facilities. However, the efficacy of UV-C is significantly reduced at increased distance from the device and by shadowing.

    Methods: In hospital rooms, we compared the efficacy of a standard UV-C room disinfection device operated in one location and a robotic, UV-C device with 3 adjustable lamps that automatically navigates around the patient room to minimize distance from the device and shadowing. The test organisms were methicillin-resistant Staphylococcus aureus (MRSA) and Clostridium difficile spores in 5% fetal calf serum on steel disk carriers that were placed in multiple locations in hospital rooms and exposed to 10 minute UV-C cycles. For the robotic device, we evaluated a 10-minute stationary cycle positioned adjacent to the bed and a mobile cycle in which the unit was programed to navigate the room.     

    Results: As shown in the figure, the robotic device operated in a stationary position was as effective as the standard device against organisms in close proximity to the device (~2-3 feet from the device), but significantly less effective at greater distances. However, operating the robotic device with the mobile cycle significantly improved performance, resulting in a ≥3.0 log reduction in C. difficile spores and MRSA at all sites tested.

    Conclusion: A robotic UV-C device programed to automatically navigate the room was effective in reducing contamination at sites throughout the room. 

    Jennifer Cadnum, B.S.1, Christina Piedrahita, B.S.2, Annette Jencson, BSMT(ASCP)SM, CIC2, J. Itty Mathew, MLS3 and Curtis J. Donskey, MD4, (1)Research Service, Cleveland VA Medical Center, Cleveland, OH, (2)Research Service, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, (3)School of Medicine, Case Western Reserve University, Cleveland, OH, (4)Infectious Diseases, Case Western Reserve University, Cleveland, OH


    J. Cadnum, None

    C. Piedrahita, None

    A. Jencson, None

    J. I. Mathew, None

    C. J. Donskey, None

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