the relationship between indoor air quality and ventilation system performance in operation rooms in Kosar hospital in Qazvin

Background: low air quality and airborne particles in hospital wards, particularly in operating rooms can have a negative impact on the health of patients and staff. Purpose: This study was conducted aimed to investigate the relationship between indoor air quality and performance of ventilation systems in operating rooms in Qazvin. Method: This study is a cross-sectional study conducted from January to March 2015 in operating rooms of Kosar hospital, Qazvin. In this study, samples of particles (PM2/5 and PM10) were measured using microdust-pro device, environmental factors such as temperature, humidity and carbon dioxide using Indoor Air Quality Meter, and ventilation system performance by hot wire anemometer (KIMO VT-100) and pressure gauge (Air Flow-APM 50K) in operating rooms of Kosar hospital, Qazvin. Results: The highest concentration of PM2/5 and PM10 reported in the pre-operative conditions was related to the outside (0.46 mg per cubic meter) and the highest average concentrations during and after surgery in the operating room 2 (0.57 mg per cubic meter) that were more than the WHO and EPA standards. Pearson test showed no significant correlation between the air quality inside and outside. Conclusion: The results indicate poor ventilation and no connection of the air inside the wards with air outside hospital. The most important resources of indoor and environmental pollution in this study can be attributed to the lack of air conditioning systems, high traffic of personnel, types of surgery, and the proximity of the hospital to one of the main streets of the city, and measures should be taken to reduce particulate matter and control air quality in operating rooms of Kosar hospital, Qazvin