Closed suction system is a multiple -use design effective in decreasing the infection of lower respiratory tract infection and can reduce the mortality rate of nosocomial pneumonia. It is designed for removal of bronchial secretions in intubated patients if they are on mechanical ventilation. The system allows the attending health professional to suction the patient's tracheobronchial secretions with disconnecting the ventilator. It recommend daily changes of the catheter in order to reduce the incidence of ventilator associated pneumonia (VAP). Indicated for single-patient use only. Advantages of the closed suction system technique provide; Better control of infections Physiological and psychological benefits Time saving