Ventilator Associated Pneumonia (VAP): Why is it so difficult to define? In real world practice: The diagnosis of VAP remains more an exercise in clinical integration than strict adherence to criteria. A retrospective evaluation of multiple definitions for ventilator associated pneumonia (VAP) diagnosis in an Australian regional intensive care unit Infection, Disease & Health VENTILATOR ASSOCIATED PNEUMONIA PPTX Ventilator Associated Pneumonia (VAP) or Hospital Acquired Pneumonia (HAP) PDF ()? is a lung infection that can cause serious health complications, especially in patients with weakened immune systems. When a patient is