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A Reference Model and HVAC Design Criteria of Mobile Negative Pressure Isolation Room for Responding to Infectious Disease Outbreaks

효율적인 국가 감염병 대응을 위한 이동형 음압격리병실 기준모델 및 공조시스템 설계방법에 관한 연구

  • Cho, Jinkyun (Department of Building and Plant Engineering, Hanbat National University)
  • 조진균 (국립한밭대학교 설비공학과)
  • Received : 2021.11.12
  • Accepted : 2022.01.07
  • Published : 2022.01.30

Abstract

Due to climate change coupled with the increase of zoonotic diseases, infectious diseases are more likely to occur and spread in the future; therefore, new alternatives and methods related to treatment environments should be considered. Under the global landscape of the prolonged COVID-19 pandemic, the number of patients who need to be cared for through negative isolation rooms is increasing. Consequently, it is essential to secure temporary medical facilities that can remain operational during a pandemic. These facilities must be safe and secured so that public confidence is increased, and treatment expedited. This study proposes a reference model and HVAC design criteria for mobile negative pressure isolation room modular systems to minimize cross-infection inside the health care space and ensure the safety of health care workers (HCWs) as well as securing rapid medical service supplies. The mobile negative pressure isolation room module basically reflects the one-way airflow direction from clean zone to dirty zone, and appropriate differential pressure control that separates the air environment between the HCW's and the patient. If properly installed, the location of the exhaust air vents need to be directly above the patient's bed, specifically on the wall near the head of the bed. The installation of the headboard on the patient's bed as an exhaust air ventilation location was considered for infection prevention and control when performing aerosol-generating procedures (AGPs).

Keywords

Acknowledgement

본 논문은 2021년도 국토교통부 재원으로 국토교통과학기술진흥원(KAIA)의 연구비 지원을 받아 수행한 연구과제 결과의 일부임. (과제번호: 21TBIP-C161839-01)

References

  1. Asad, H., Johnston, C., Blyth, I., Holborow, A., Bone, A., Porter, L., Tidswell, P., & Healy, B. (2020). Health care workers and patients as trojan horses: a COVID19 ward outbreak, Infection Prevention in Practice, 2(3), 100073. https://doi.org/10.1016/j.infpip.2020.100073
  2. ASHRAE. (2019). ANSI/ASHRAE Standard 62.1-2019: Ventilation for acceptable indoor air quality, American Society of Heating, Refrigerating and Air-conditioning Engineers.
  3. ASHRAE/ASHE. (2017). ANSI/ASHRAE/ASHE Standard 170-2017: Ventilation of health care facilities, American Society of Heating, Refrigerating and Air-conditioning Engineers / the American Society for Health Care Engineering.
  4. CDC. (2003). Guidelines for environmental infection control in health-care facilities, Centers for Disease Control and Prevention.
  5. CDC. (2020a). Clinical questions about COVID-19: questions and answers, Centers for Disease Control and Prevention (Updated December 4, 2020).
  6. CDC. (2020b). Interim infection prevention and control recommendations for healthcare personnel during the coronavirus disease 2019 (COVID-19) Pandemic, Centers for Disease Control and Prevention (Updated November 4, 2020).
  7. CDC. (2021). Scientific brief: SARS-CoV-2 transmission, Centers for Disease Control and Prevention (Updated May 7, 2021).
  8. Cho, J., Woo, K., & Kang, H. (2017). Experimental study of an AIIR ventilation system for effective removal of airborne contamination in hospitals, Journal of the Architectural Institute of Korea Structure & Construction, 33(3), 85-90. https://doi.org/10.5659/JAIK_SC.2017.33.3.85
  9. Cho, J., Woo, K., & Kim, B.S. (2018). Removal of airborne contamination in airborne infectious isolation rooms, ASHRAE Journal, 61(2), 8-21.
  10. Hick, J.L., Barbera, J.A., & Kelen, G.D. (2009). Refining surge capacity: conventional, contingency, and crisis capacity. Disaster Medicine and Public Health Preparedness, 3(1), 59-67.
  11. Hick, J.L., Christian, M.D., & Sprung, C.L. (2010). Chapter 2. Surge capacity and infrastructure considerations for mass critical care. Intensive Care Medicine, 36(1), 11-20 https://doi.org/10.1007/s00134-009-1650-x
  12. Jo, S.M., Kim, G.H., & Sung, M.K. (2017). Analysis on contaminant migration from negative pressure isolation ward during door opening and human movement using CFD simulation, Journal of the Architectural Institute of Korea Structure & Construction, 33(10), 61-68. https://doi.org/10.5659/JAIK_SC.2017.33.10.61
  13. Jung, M., & Hong, J.K. (2019). A numerical study on cough particle dispersion and deposition according to the location of exhaust air diffuser in airborne infection isolation room, Korean Journal of Air-Conditioning and Refrigeration Engineering, 31(12), 559-567. https://doi.org/10.6110/kjacr.2019.31.12.559
  14. KADC. (2019). Operation and management guidelines for nationally-designated inpatient beds, Korea Disease Control and Prevention Agency / The Ministry of Health and Welfare.
  15. Kim, D.G., & Nam, T.J. (2021). COVID-19 management in medical facilities - mobile negative pressure module system, Air Cleaning Technology, 34(2), 46-61.
  16. Kim, J., & Hong, J.K. (2018). A Numerical study on pressure fluctuation and air exchange volume of door opening and closing speeds in negative pressure isolation room, Journal of The Korea Institute of Healthcare Architecture, 24(1), 51-58. https://doi.org/10.15682/JKIHA.2018.24.1.51
  17. Kwon, S., & Sung, M. (2016). Isolation effectiveness by progressive space organization in negative pressured isolation unit, Journal of The Korea Institute of Healthcare Architecture, 22(4), 79-86. https://doi.org/10.15682/JKIHA.2016.22.4.79
  18. Lee, B., Yoon, J., Yoon, C., Lee, K., Min, K.B., Yeo, M.S., & Kim, K-W. (2017). Comparative analysis of domestic and foreign guidelines for airborne infection isolation rooms (AIIRs), Journal of Korean Institute of Architectural Sustainable Environment and Building Systems, 11(3), 230-237.
  19. Lee, S., & Lee, J.W. (2017). A Design methodology for the temporary isolation room based on the MERS-Cov infection control guideline - In case of temporary negative pressure isolation room using shipping container, Journal of the Architectural Institute of Korea Planning & Design, 33(12), 19-28. https://doi.org/10.5659/JAIK_PD.2017.33.12.19
  20. Lurie, N., Dausey, D.J., Knighton, T., Moore, M., Zakowski, S., & Deyton, L. (2008). Community planning for pandemic influenza: lessons from the VA health care system, Disaster Medicine and Public Health Preparedness, 2(4), 251-257. https://doi.org/10.1097/DMP.0b013e31817dd143
  21. Mead, K., Feng, A., Hammond, D., & Shulman, S. (2012). Expedient methods for surge airborne isolation within healthcare settings during response to a natural or manmade epidemic, Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, EPHB Report No. 301-05f
  22. Miller, S.L., Clements, N., Elliott, S.A., Subhash, S.S., Eagan, A., & Radonovich, L.J. (2017). Implementing a negative -pressure isolation ward for a surge in airborne infectious patients, American Journal of Infection Control, 45(6), 652-659. https://doi.org/10.1016/j.ajic.2017.01.029
  23. OSHA. (2021). Protecting Workers: guidance on mitigating and preventing the spread of COVID-19 in the Workplace, Occupational Safety and Health Administration (Updated August 13, 2021).
  24. Peavey, E., Kim, M., Roark, J. Holton, S., Schroer, J., Scrantom, B. Evans, J. Beebe, C., & Flannery, J. (2021). The pandemic-resilient hospital: How design can help facilities stay operational and safe, HKS, Arup and the American Society for Health Care Engineering.
  25. REHVA. (2020). REHVA COVID-19 guidance document; How to operate HVAC and other building service systems to prevent the spread of the coronavirus (SARS-CoV-2) disease (COVID-19) in workplaces, the Federation of European Heating, Ventilation and Air Conditioning Associations.
  26. Suvanjan, B., Kunal, D., Akshoy, R.P., & Ranjib, B. (2020). A novel CFD analysis to minimize the spread of COVID-19 virus in hospital isolation room, Chaos, Solitons & Fractals, 139, 110294. https://doi.org/10.1016/j.chaos.2020.110294
  27. Tran, K., Cimon, K., Severn, M., Pessoa-Silva, C.L., & Conly, J. (2012). Aerosol generating procedures and risk of transmission of acute respiratory infections to healthcare workers: a systematic review, PLoS One, 7(4), e35797. https://doi.org/10.1371/journal.pone.0035797
  28. WHO. (2020). COVID-19 Virtual press conference, The World Health Organization (July 7, 2020).