The sequelae of anesthesia in cats are generally pulmonary edema. Symptoms usually include mouth breathing, accelerated respiratory rate, and cyanotic tongue. If the pet owner finds that the cat has the above symptoms after taking anesthesia, it is recommended to take it to the hospital immediately for oxygen inhalation. Then diuretics are used for treatment, and 24-hour dedicated care is recommended. If conditions permit, it is best to use a hyperbaric oxygen chamber for treatment.