Investigation of the number of particles in an operating room at different ambient temperatures and inlet velocities

Ufat, Hande; Kaynaklı, Ömer; Yamankaradeni̇z, Nurettin; Yamankaradeniz, Recep

doi:10.1080/14733315.2017.1392107

Cited by 7 publications

(7 citation statements)

References 18 publications

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“…The application of CFD for investigating indoor air quality in operating rooms has been reported in some pieces of research. Accordingly, the ow characteristics in an operating room depend on its geometry and door opening cycles [25], ambient temperature [26], supply inlets and return outlets con guration [27], inlet di users geometry [28], ventilation air ow rate [29], location of obstacles [30], surgeons posture [31], sta clothing [32], and their activity level [33]. The results of previous studies showed that the location of return outlets was not as important as the location of supply inlets [34,35].…”

Section: Introductionmentioning

confidence: 99%

Computational modeling of the operating room ventilation performance in connection with surgical site infection

2018

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The primary source of surgical site infection is the deposition of akes released from the exposed skin of surgical sta or the patient on the exposed surgical wound. In this study, a computational model for simulating air ow and thermal conditions in an operating room is developed, and transport and deposition of particulate contaminants near the wound are analyzed. The results show the formation of a thermal plume over the wound tissue, which is typically at a higher temperature than the surrounding. The thermal plume protects the wound from the deposition of contaminants. In addition, the computational model predicts an optimum value for the inlet air velocity that is mainly maintaining protective shielding e ect of the wound thermal plume. The e ects of particle size, surgical lights characteristics, and the presence of partitions on the optimum inlet air velocity are also studied. Based on the results, the formation of thermal plume over surgical lamps may easily disturb the air ow and impress the optimum inlet air velocity accordingly. Unfavorable obstruction e ects of surgical lights can be reduced using welldesigned luminaries. The present study provides a better understanding of air ow pattern and transport process in operating rooms equipped with UCV systems and may nd application in designing more e ective ventilation strategies.

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Section: Introductionmentioning

confidence: 99%

Computational modeling of the operating room ventilation performance in connection with surgical site infection

2018

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“…Of the 86 total articles investigating OR ventilation, 30 used modeling approaches to investigate the effects of HVAC components on the built environment. 31,41,[128][129][130][131][132][133][134][135][136][137]64,[138][139][140][141][142][143][144][145][146][147][121][122][123][124][125][126][127] Twenty-seven of those 30 articles utilized computational fluid dynamics (CFD) modeling. The numerical parameters in CFD models are often validated to some degree via small-scale or simplified experimental setups, or using previously published measurements.…”

Section: Modeling Studiesmentioning

confidence: 99%

“…Six of these studied inlet airflow velocity's effects on contamination, particle count, and particle deposition, but did not come to a consensus on an optimal inlet air velocity value. 31,123,125,126,133,134 One article concluded that contamination was minimized at a velocity of 2.37 m/s, but cautioned that airflow can easily be disrupted by slight changes in the design of the OR air curtain and exhaust vents 124 . The last article studied inlet airflow and its impact on airflow patterns.…”

Section: Modeling Studiesmentioning

confidence: 99%

Influence of the Built Environment on Airflow, Contamination, and Infection in the Operating Room: A Systematic Literature Review

Klimkiewicz

Gallagher

Lambrou

et al. 2022

Preprint

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BackgroundHealthcare-associated infections (HAIs) constitute a significant financial strain on healthcare systems across the world, with surgical site infections (SSIs) being the costliest form. Despite the existence of diverse sources of infection in the operating room (OR), current literature focuses on human and procedural sources of contamination that could lead to an infection. Comparatively, the OR built environment is understudied as a potential disease transmission interface between the environment, patients, and surgical staff. This systematic literature review aims to investigate how the physical characteristics and components of the built environment impact airflow, infection risk, aerosols, particle counts, contamination, and pathogens in operating rooms.Methods and FindingsLiterature searches were conducted in the PubMed and Web of Science Core Collection databases on December 21, 2020, ultimately retrieving 2,965 articles after duplicates were removed. During abstract screening, all abstracts were independently reviewed by two authors and conflicts were resolved by a third author. All articles published since January 1, 2010, that reported primary data investigating an aspect of the built environment inside an OR in relation to airflow, contamination, and/or infection for which the full text in English was available were included. This resulted in the inclusion of 138 articles, which includes studies conducted in ORs during active surgeries, computer modeling studies, and simulations in which a real OR was used for a mock surgical procedure. Six major built environment categories were identified based on the collected literature: OR layout, disinfection systems, surgical lights, doors, ventilation, and portable airflow devices. A survey created on Qualtrics software was used to record the aspect of the built environment and the outcome of each study, as well as the relationship between the two.ConclusionsWhile OR ventilation has been studied extensively, the OR built environment as a whole is understudied in relation to airflow, contamination, and infection. The current literature is inconsistent in both its findings and subsequent recommendations, making it difficult to inform hospital design in the context of SSIs. No articles were identified that discussed respiratory infection transmission in the OR, and very few addressed healthcare worker (HCW) safety in relation to the OR built environment. The significant discrepancies in the literature identified in this review highlight the need for future studies that assess the quality and bias of these studies before firm recommendations can be made. Future work should also focus on addressing the lack information regarding respiratory infection transmission in the OR, especially in the context of HCW safety.

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“…This model was developed using renormalization. K-epsilon (k-ε) turbulence model is the most common model used in CFD to simulate mean flow characteristics for turbulence flow conditions [14,15]. Conservation of mass equation:…”

Section: Numerical Modelmentioning

confidence: 99%

Design of Air Distribution System for Operation Theatre Using Flow Visualization Techniques to Improve Flow Characteristics

Rahate

Sarode

2020

IJE

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Operation Theatre (OT) is the most important area where precise controlled on indoor air quality is required because it is directly related to patient health and its recovery period. This work aims to study and visualize the airflow distribution of conventional flat air diffuser ventilation system and newly designed angular air ventilation system in OT. Angular Air Distribution (AAD) system is designed in such way that, conditioned air is throw in OT with some angle so it can cover the maximum area of OT with laminar flow and minimum installation area. The performance of angular air distribution (AAD) system with varying inlet diffuser angle, constant 0.4m/s inlet velocity and air flow pattern are investigated with the help of numerical simulation and experimental setup of prototype OT model. Detail experimental investigation is done on a prototype with the help of a smoke test and camera target method (CTM). Both numerical and experimental results showed a similar pattern of air distribution for the various design configurations.

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Investigation of the number of particles in an operating room at different ambient temperatures and inlet velocities

Cited by 7 publications

References 18 publications

Computational modeling of the operating room ventilation performance in connection with surgical site infection

Computational modeling of the operating room ventilation performance in connection with surgical site infection

Influence of the Built Environment on Airflow, Contamination, and Infection in the Operating Room: A Systematic Literature Review

Design of Air Distribution System for Operation Theatre Using Flow Visualization Techniques to Improve Flow Characteristics

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