Special Feature: Prevention of Ventilator Associated Clinician.com Figure 9 from Common Complications in the Crit ical ly I l l Patient Semantic Scholar What is VAP?, Ventilator Associated Pneumonia is a lung infection that develops 48 hours or more after endotracheal intubation. It increases ventilator days, costs, and mortality., The Power of What does VAP mean? Definition of VAP VAP stands for Very Annoying Person. By AcronymsAndSlang.com