Study on Ventilation Performance in Operating Room with Variation Ventilation Design

Abstract

Proper air conditioning and ventilation system design for control of airborne bacteria is very important to reduce surgical site infection (SSI) risks in hospital operating rooms (OR). This study used computational fluid dynamics (CFD) simulations to address the effect of ventilation and air- conditioning systems with different air-flow patterns, specifically, vertical laminar flow, horizontal laminar flow, and vertical using slot fan by measuring both ventilation and contaminant-removal efficiency. Contaminant concentrations in regions nearest to the operating table were compared and analyzed. The study found that cases 1 and 2 that are laminar airflow are very powerful in removing contaminant CO2 in the room than other case using slot fan (case 3, 4, and 5).The simulation result table obtained case 2 the best case in ventilation and removal efficiency. From the table results obtained that case 2 better 6.57 % in ventilation & 1.14 % in removal efficiency than case 1 as the second position result in simulation. The experiment results table obtained that case 2 better 9.3 % in ventilation & 1.68 % in removal efficiency than case 1 in the experiment. And also 20.75 % in ventilation & 12 % removal efficiency than case 3.However, a case using slot fan is better in terms of avoiding turbulence around the patient because of buoyancy effect. And it more affected for reducing surgical site infection (SSI) risks in hospital operating room. This happens because in that case, the areas such operations seem to create an air wall to protect contamination in the around surgical area and decreasing the buoyancy effect in the surgical area..