Lungs: barotrauma (volutrauma), pulmonary embolism (PE), pulmonary fibrosis, ventilator-associated pneumonia (VAP) Gastrointestinal: bleeding (ulcer), dysmotility, pneumoperitoneum, bacterial translocation Neurological: hypoxic brain damage Cardiac: abnormal heart rhythms, myocardial dysfunction Kidney: acute kidney failure, positive fluid balance Mechanical: vascular injury, pneumothorax (by placing pulmonary artery catheter), tracheal injury/stenosis (result of intubation and/or irritation by endotracheal tube) Nutritional: malnutrition (catabolic state), electrolyte abnormalities