Reduction in Ventilator Acquired Pneumonia (VAP) GNSH PDF] The Clinical Diagnosis of Ventilator Associated Pneumonia Semantic Scholar Ventilator associated pneumonia (VAP) is a type of pneumonia that develops at least 48 hours after a patient was intubated and placed on the mechanical ventilator. It's a preventable lung infection that can General flowchart of the study. VAP, ventilator associated pneumonia. Download Scientific Diagram