Tehran University of Medical Sciences Archives of Anesthesiology and Critical Care 2423-5849 2 2 2016 06 13 193 196 EN Nasim Alipour Department of Anesthesiology and Critical Care, School of Para-medicine, Hamadan University of Medical Sciences, Hamadan, Iran. Nahid Manouchehrian Department of Anesthesiology and Critical Care, Hamadan University of Medical Sciences, Hamadan, Iran. Mehdi Sanatkar Department of Anesthesiology and Critical Care, Farabi Eye Hospital,Tehran University of Medical Sciences, Tehran, Iran Hassan Mohammadi Poor Anvari Department of Anesthesiology and Critical Care, Emam Reza Hospital, Tabriz University of Medical Sciences, Tabriz, Iran. Mohammad Sadegh Sanie Jahromi Department of Anesthesiology and Critical Care, Jahrom University of Medical Sciences, Jahrom, Iran 2016 06 13 2016 06 13 Background: Nosocomial pneumonia is a prevalent complication in patients admitted to intensive care units (ICU). Endotracheal suction is used in cleaning the airways of secretions in patients under mechanical ventilation. Performing suction accurately is of great importance to prevent ventilation associated pneumonia. The purpose of this study was to compare the effect of open versus closed tracheal suction on the incidence of VAP. Methods: This was a clinical trial study performed on 86 intubated patients in ICU. Patients of control group (n=43) underwent conventional open suction and case group (n=43) closed suction. After 72 hours, patients were assessed regarding VAP using clinical pulmonary infection score (CPIS). Results: There was no significant difference regarding age (p=0.15) and gender (p=0.33) between the two groups. The incidence of ventilator associated pneumonia was significantly lower in closed method compared to the open method (p=0.016). Conclusion: Closed tracheal suction compared to the open method was associated with lower incidence of VAP in patients of ICU. https://aacc.tums.ac.ir/index.php/aacc/article/view/79 https://aacc.tums.ac.ir/index.php/aacc/article/download/79/202