Airflow patterns due to door motion and pressurization in hospital isolation rooms

Mousavi, Ehsan; Grosskopf, K. R.

doi:10.1080/23744731.2016.1155959

Cited by 39 publications

(31 citation statements)

References 18 publications

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“…Most of the other studies have visualized the door operation generated flows e.g. with small-scale water models using different dyes as tracers [19,22,24] or with CFD approaches in various scenarios using several different boundary conditions and methods [23,26,31,32,34]. Nevertheless, they all concluded that opening of the hinged door can generate notable flow through the doorway and hence disperse airborne contaminants across the doorway.…”

Section: Flow Visualizationsmentioning

confidence: 99%

“…However, it is not yet precisely clear how effective it is in reducing the air from escaping an isolation room as it has been more in common to examine the effect of pressure difference although it vanishes when the door is opened. For instance, Adams et al [28] and Mousavi and Grosskopf [32] have pointed out that pressure difference significantly reduces the aerosol transfer through the doorway during hinged door operation. However, only few have estimated or measured the effect of flow rate differentials for both hinged and sliding doors.…”

Section: The Effect Of Supply-exhaust Flow Rate Differentialmentioning

confidence: 99%

“…Enhanced usage has led to increased interest in containment testing and to door operation induced air and contaminant transport [19e34]. A wide variety of different methods have been used to study the issue, including: computational fluid dynamics (CFD) [23,26,30e32,34], small-scale models [19,22,24,29], full-scale models [20] and field studies [21,25,27,28,32,33].…”

Section: Introductionmentioning

confidence: 99%

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Airflow patterns through single hinged and sliding doors in hospital isolation rooms – Effect of ventilation, flow differential and passage

Kalliomäki

Saarinen

Tang

et al. 2016

Building and Environment

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a b s t r a c tNegative pressure isolation rooms are used to house patients with highly contagious diseases (e.g. with airborne diseases) and to contain emitted pathogens to reduce the risk for cross-infection in hospitals. Airflows induced by door opening motion and healthcare worker passage can, however, transport the potentially pathogen laden air across the doorway. In this study airflow patterns across the isolation room doorway induced by the operation of single hinged and sliding doors with simulated human passage were examined. Smoke visualizations demonstrated that the hinged door opening generated a greater flow across the doorway than the sliding door. Tracer gas measurements showed that the examined ventilation rates (6 and 12 air changes per hour) had only a small effect on the air volume exchange across the doorway with the hinged door. The results were more variable with the sliding door. Supply-exhaust flow rate differential reduced the door motion-induced air transfer significantly with both door types. The experiments showed that the passage induced substantial air volume transport through the doorway with both door types. However, overall, the sliding door performed better in all tested scenarios, because the door-opening motion itself generated relatively smaller air volume exchange across the doorway, and hence should be the preferred choice in the design of isolation rooms.

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Section: Flow Visualizationsmentioning

confidence: 99%

Section: The Effect Of Supply-exhaust Flow Rate Differentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Airflow patterns through single hinged and sliding doors in hospital isolation rooms – Effect of ventilation, flow differential and passage

Kalliomäki

Saarinen

Tang

et al. 2016

Building and Environment

View full text Add to dashboard Cite

show abstract

“…Studies have shown that opening the doors of ISRs can generate flow across the doorway. [25][26][27] Inducing a pressure difference, however, across a door can decrease the air volume exchange across the door. 25,28 For this demonstration, it would have been optimal to construct an ante-room at each hallway entrance to the temporary isolation ward (we only constructed one to minimize project complexity).…”

Section: Discussionmentioning

confidence: 99%

“…[25][26][27] Inducing a pressure difference, however, across a door can decrease the air volume exchange across the door. 25,28 For this demonstration, it would have been optimal to construct an ante-room at each hallway entrance to the temporary isolation ward (we only constructed one to minimize project complexity). With 2 hallway anterooms, one would be used as a clean anteroom for ingress and PPE donning, and the other would be a potentially contaminated anteroom for egress and PPE doffing.…”

Section: Discussionmentioning

confidence: 99%