Ventilator Associated Pneumonia (VAP) EMCrit Project Figure 7 from Common Complications in the Crit ical ly I l l Patient Semantic Scholar The 2009 US CDC NHSN clinical surveillance definition for Download Table 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