VAP, VAC, IVAC and Ventilator Associated Events: The Need for Objectivity for Surveillance 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 Full article: The pathogenesis of ventilator associated pneumonia: old and new mechanisms What is VAP? (Ventilator Associated Pneumonia) Medical Definition Ventilator associated pneumonia (VAP)