<prompt> Most important measure to avoid subglottic edema in children isUse of appropriate size endotracheal tubeLubricating endotracheal tube prior to intubationAdminister i.v Lidocaine for all intubationsAdminister i.v Steroids for all intubations  <response>: Larger outer diameter of endotracheal tube, multiple intubation attempts, children between 1-4 years are risk factors for subglottic edema and croup. So appropriate size endotracheal tube has tube used. 