A 3-year-old girl has had an increase in body temperature up to 38,5°C for four days. The child refuses to eat. Over the last two days, nose and mouth breathing has become difficult. Mesopharyngoscopy reveals hyperthermia and enlargement of tonsils, as well as hyperemia and bulging of the posterior wall of the oropharynx, which significantly narrows the oropharyngeal lumen. What complication of quinsy occurred in the patient?