@article{ART003210227},
author={Sihn, Dongmin and Jo, Yelim and Bang, Jong-Il and Sung, Minki},
title={Analysis of Airborne Bacteria Control Efficacy of UR-UVGI Systems in General Hospital Wards Mock-up},
journal={JOURNAL OF THE KOREA INSTITUTE OF HEALTHCARE ARCHITECTURE},
issn={2733-8649},
year={2025},
volume={31},
number={2},
pages={7-14}
TY - JOUR
AU - Sihn, Dongmin
AU - Jo, Yelim
AU - Bang, Jong-Il
AU - Sung, Minki
TI - Analysis of Airborne Bacteria Control Efficacy of UR-UVGI Systems in General Hospital Wards Mock-up
JO - JOURNAL OF THE KOREA INSTITUTE OF HEALTHCARE ARCHITECTURE
PY - 2025
VL - 31
IS - 2
PB - Korea Institute Of Healthcare Architecture
SP - 7
EP - 14
SN - 2733-8649
AB - Purpose: This study aimed to experimentally analyze the effectiveness of an Upper-Room Ultraviolet Germicidal Irradiation (UR-UVGI) system in reducing airborne bacteria in a mock-up of a multi-bed general ward. Multi-bed hospital wards pose a high risk of cross-infection via airborne pathogens. Since existing ventilation systems alone have limitations in infection control, evaluating the applicability of UR-UVGI systems is essential. Methods: The experiment was conducted by varying ventilation rates and UR-UVGI operation conditions. Bacillus subtilis (ATCC 6633) was aerosolized from one bed using a nebulizer, and airborne bacteria were collected from the other beds and the HVAC terminal using an impact sampler. UV-C intensity was measured to evaluate its spatial distribution across the room. The quantified bacterial concentrations were used to calculate reduction rates and equivalent air change rates (eACR). Results: Operation of the UR-UVGI system significantly reduced airborne bacterial concentrations under all conditions. A correlation between UV-C intensity and bacterial reduction rates was observed. The equivalent air change rate (eACR) increased by up to 2.97 ACH. Implications: This study experimentally demonstrated that UR-UVGI systems can effectively complement existing ventilation systems as an infection control measure in multi-bed wards. These findings provide scientific evidence supporting the implementation of UR-UVGI systems in hospital settings and are expected to contribute to improved infection control and energy efficiency in healthcare facilities.
KW - Upper-Room Ultraviolet Germicidal Irradiation(UR-UVGI);General Ward;Airborne Bacteria;Infection Control
DO -
UR -
ER -
Sihn, Dongmin, Jo, Yelim, Bang, Jong-Il and Sung, Minki. (2025). Analysis of Airborne Bacteria Control Efficacy of UR-UVGI Systems in General Hospital Wards Mock-up. JOURNAL OF THE KOREA INSTITUTE OF HEALTHCARE ARCHITECTURE, 31(2), 7-14.
Sihn, Dongmin, Jo, Yelim, Bang, Jong-Il and Sung, Minki. 2025, "Analysis of Airborne Bacteria Control Efficacy of UR-UVGI Systems in General Hospital Wards Mock-up", JOURNAL OF THE KOREA INSTITUTE OF HEALTHCARE ARCHITECTURE, vol.31, no.2 pp.7-14.
Sihn, Dongmin, Jo, Yelim, Bang, Jong-Il, Sung, Minki "Analysis of Airborne Bacteria Control Efficacy of UR-UVGI Systems in General Hospital Wards Mock-up" JOURNAL OF THE KOREA INSTITUTE OF HEALTHCARE ARCHITECTURE 31.2 pp.7-14 (2025) : 7.
Sihn, Dongmin, Jo, Yelim, Bang, Jong-Il, Sung, Minki. Analysis of Airborne Bacteria Control Efficacy of UR-UVGI Systems in General Hospital Wards Mock-up. 2025; 31(2), 7-14.
Sihn, Dongmin, Jo, Yelim, Bang, Jong-Il and Sung, Minki. "Analysis of Airborne Bacteria Control Efficacy of UR-UVGI Systems in General Hospital Wards Mock-up" JOURNAL OF THE KOREA INSTITUTE OF HEALTHCARE ARCHITECTURE 31, no.2 (2025) : 7-14.
Sihn, Dongmin; Jo, Yelim; Bang, Jong-Il; Sung, Minki. Analysis of Airborne Bacteria Control Efficacy of UR-UVGI Systems in General Hospital Wards Mock-up. JOURNAL OF THE KOREA INSTITUTE OF HEALTHCARE ARCHITECTURE, 31(2), 7-14.
Sihn, Dongmin; Jo, Yelim; Bang, Jong-Il; Sung, Minki. Analysis of Airborne Bacteria Control Efficacy of UR-UVGI Systems in General Hospital Wards Mock-up. JOURNAL OF THE KOREA INSTITUTE OF HEALTHCARE ARCHITECTURE. 2025; 31(2) 7-14.
Sihn, Dongmin, Jo, Yelim, Bang, Jong-Il, Sung, Minki. Analysis of Airborne Bacteria Control Efficacy of UR-UVGI Systems in General Hospital Wards Mock-up. 2025; 31(2), 7-14.
Sihn, Dongmin, Jo, Yelim, Bang, Jong-Il and Sung, Minki. "Analysis of Airborne Bacteria Control Efficacy of UR-UVGI Systems in General Hospital Wards Mock-up" JOURNAL OF THE KOREA INSTITUTE OF HEALTHCARE ARCHITECTURE 31, no.2 (2025) : 7-14.
