Journal of The Korea Institute of Healthcare Architecture (의료ㆍ복지 건축 : 한국의료복지건축학회 논문집)

Korea Institute of Healthcare Architecture (한국의료복지건축학회)
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A Numerical Study on Pressure Fluctuation and Air Exchange Volume of Door Opening and Closing Speeds in Negative Pressure Isolation Room

음압격리병실에서의 병실 문의 개폐속도에 따른 실간 압력변동 및 공기교환량에 대한 해석적 연구

  • Kim, Jun Young (Department of HVAC & Firefighting Engineering, Gachon University) ;
  • Hong, Jin Kwan (Department of HVAC & Firefighting Engineering, Gachon University)
  • Received : 2018.01.17
  • Accepted : 2018.02.09
  • Published : 2018.03.15
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Abstract

Purpose: In this study, through the comparison of the pressure fluctuation and air exchange volume in negative isolation room according to the type of the door and door opening/closing speeds, which is one of the main factors causing the cross contamination of the negative pressure isolation room, establishes standard operating procedures to prevent cross contamination in high risk infectious diseases and isolation room design. Methods: In this study, the air flow each of the room is analyzed using ANASYS CFX CODE for flow analysis. In addition, the grid configuration of the door is constructed by applying Immersed Solid Methods. Results: The pressure fluctuation due to the opening and closing of the hinged door was very large when the moment of the hinged door opened and closed. Especially, at the moment when the door is closed, a pressure reversal phenomenon occurs in which the pressure in the isolation room is larger than the pressure in the anteroom. On the other hand, the pressure fluctuation due to the opening and closing of the sliding door appeared only when the door was closed, but the pressure reversal phenomenon not occurred at the moment when the sliding door was closed, unlike the hinged door. As the opening and closing speed of the hinged door increases, the air exchange volume is increased. However, as the opening and closing speed of the sliding door is decreased, the air exchange volume is increased. Implications: According to the results of this study, it can be concluded that the pressure fluctuation due to the opening and closing of the hinged door is greater than the pressure fluctuation due to the opening and closing of the sliding door. In addition, it can be confirmed that the pressure reversal phenomenon, which may cause to reduce the containment effect in negative pressure isolation room, is caused by the closing of the hinged door. Therefore, it is recommended to install a sliding door to maintain a stable differential pressure in the negative isolation room. Also, as the opening and closing speed of the hinged door is slower and the opening and closing speed of the sliding door is faster, the possibility of cross contamination of the room can be reduced. It is therefore necessary to establish standard operating procedures for negative isolation room for door opening and closing speeds.

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References

  1. AIA, 2001, The Guideline for Design and Construction of Hospital and Health Care Facilities, 2001 edition, pp. 56.
  2. Victoria, 2007, Guideline for The Classification and Design of Isolation Rooms in Health Care Facilities, Victoria Advisory Committee on Infection Control, pp. 5-6.
  3. 질병관리본부, 2016, 2016 메르스 대응지침, 메르스 대응지침[4-1판], pp. 3-5.
  4. J.W.Tang, I.Eames, Y.Li, Y.A.Taha, P.Wilson, G.Bellingan, K.N.Ward, J.Breuer, 2005, Door Opening Motion Can Potentially Lead to a Transient Breakdown in Negative-Pressure Isolation Condition: The Importance of Vorticity and Buoyancy Airflows, Journal of Hospital Infection (2005) 61, 283-286. https://doi.org/10.1016/j.jhin.2005.05.017
  5. P.Kalliomaki, P.Saarinen, J.W.Tang, H.Koskela, 2016, Airflow Patterns through Single Hinged and Sliding Doors in Hospital Isolation Rooms - Effect of Ventilation, Flow Differential and Passage, Budiling and Environment 107 (2016) 154-168. https://doi.org/10.1016/j.buildenv.2016.07.009
  6. 조성민, 김기훈, 성민기, CFD 해석을 이용한 출입문 개폐와 인체이동에 따른 음압격리병실에서의 오염물질 유출량 분석, 대한건축학회논문집 구조계, 33(10), pp.61-68, 2017.10
  7. J.Adams, L.David, Johnson, A.Robert, Lynch, 2011, The Effect of Pressure Differential and Care Provider Movement on Airborne Infectious Isolation Room Containment Effectiveness, Am J Infect Control 2011;39:91-7. https://doi.org/10.1016/j.ajic.2010.05.025
  8. CDC, 2007, Guideline for Isolation Precaution: Preventing Transmission of Infectious Agents in Healthcare Settings.
  9. ANASYS, ANASYS CFX CODE manual ver.16.2.
  10. R.Mittal, G.Iaccarino, 2005, Immersed Boundary Methods, Annu. Rev. Fluid Mech. 2005. 37:239-61. https://doi.org/10.1146/annurev.fluid.37.061903.175743
  11. T.Ganesan, M.Awang, 2015, Large Eddy Simulation (LES) for Steady-State Turbulent Flow Prediction, Springer International Publishing Switzerland 2015.
  12. CDC, 2005, Guidelines for Preventing the Transmission of Mycobacterium Tuberculosis in Health-care Settings, vol. 54, MMWR.
  13. I.Eames, D.shoaib, C.A.Klettner, V.Taban, 2009, Movemant of Airborne Contaminants in a Hospital Isolation Room, J. R. Soc. Inerface(2009) 6, S757-S766 doi:10.1098. https://doi.org/10.1098/rsif.2009.0319.focus
  14. J.I.Choi, J.R.Edwards, 2011, Large Eddy Simulation of Human Induced Contaminant Transport in Room Compartments, Indoor Air 2012; 22:77-87. https://doi.org/10.1111/j.1600-0668.2011.00741.x