The aim of the study is to test the effectiveness of a solutions of beclomethasone repeatedly instilled through the supraglottic line of the endotracheal tube on post-extubation airway disturbances related to tracheal intubation. The primary endpoint will be the decrease of the incidence of sore-throat 15 minutes and 12 hours after extubation. Secondary endpoints will regard the effects on hoarseness and cough.