Figure 3. shows how the recurrent laryngeal nerve (translargeal) is blocked. After entering the needle into the trachea, make an air aspiration before the injection of drugs. (Taken from Artime CA, Sanchez A: Preparation of the patient for awake intubation. In Hagberg CA, editor. Benumof and Hagberg's airway management, 3* ed, Philadelphia, 2013, Saunders, p. 259.).