Ventilator Associated Pneumonia (VAP) is a serious lung infection that occurs in patients on mechanical ventilation for over 48 hours. It is often caused by bacteria entering the lungs through the ventilator, leading An in depth look at ventilator associated pneumonia in trauma patients and efforts to increase bundle compliance, education and documentation in a surgical trauma critical care unit American Journal of Infection Control Study participants. VAP ventilator associated pneumonia. Download Scientific Diagram Study flowchart. MV, mechanical ventilation; VAP, ventilator associated Download Scientific Diagram