The death of rat does not result from secretion,the period of warm ischemia is cut as short as possible.Livability and survival quality is advanced,which are in favor of experiment.

• 可避免大鼠因分泌物增多而死亡，从而尽可能缩短供体喉的热缺血时间，提高受体鼠的存活率和生存质量，有利于实验的观察。