Carefully watch the patient for edema of the upper airway with respiratory obstruction. The airway may be maintained by either endotracheal intubation or tracheotomy if necessary.

• 仔细观察病人是否有带有呼吸阻塞的上呼吸道水肿。如果必要的话，可以通过气管插管或气管切开术来维持呼吸道的畅通。