adj.环甲(软骨)的

J. Caution: Do not cut or remoe the cricothyroid cartilage. 注意事项：手术时应避免切伤环状软骨，以免术后出现喉狭窄。

J. Caution: Do not cut or remove the cricothyroid cartilage. 注意事项：手术时应避免切伤环状软骨，以免术后出现喉狭窄。

Objective:To investigate the feasibility of Selsctive cricothyroid laryngotomy instead of incision of trachea. 目的:环甲膜切开选择性代替气管切开的可行性。

Methods: 251 cases performed cricothyroid largngotomy instead of incision of trachea. 方法:251例需行气管切开用环甲膜切开代替。

Conclusion:Cricothyroid laryngotomy is rapid,less hemorrhase,precige,precise.The technique should be recommeded. 结论:环甲膜切开速度快,出血少,定位准确,可长期戴管,在有适应证的情况可在临床推广。

The External Laryngeal Nere is a motor nere, innerating the cricothyroid muscle and part of the transerse arytenoid muscle. 喉上神经外侧支为运动神经，支配环甲肌和部分杓横肌。