① Dyspnea and suffocation(呼吸困难&窒息)----most critical
Causes: hemorrhage,
laryngeal edema
malacia of tracheal ring,
Bilateral laryngeal nerve injured.
Clinical manifestations: progressive dyspnea, restlessness,
cyanosis, even sudden suffocation
Prevention: hemostasis、tracheotomy、prepare tracheotomy pack.
Treatment: treat in the bed, tracheotomy.