Surgcal approach was median laryngotomy for 2 cases and lateral pharyngotomy for 1 case. 3例中，2例经喉裂开、1例经咽侧切开予以切除，均治愈，无复发。
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。
She would rather ask the doctor to take away her tube from her mouth and have an operation of laryngotomy. 她宁愿选择盖手指模代替签名，要求医生拔掉她口中的插喉，在喉咙处开辟一个洞口，用呼吸机帮助她生存。
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。
Results:Tracheotomy was applied in 171 cases,and cricothyroid laryngotomy was performed in 7 cases among these patients. 结果171例困难气管切开病例均成功进行气管切开术,其中环甲膜切开7例,气管切开成功率100%25,无术中死亡病例发生。
Results: Tracheotomy was applied in 171 cases, and cricothyroid laryngotomy was performed in 7 cases among these patients.The achievement ratio was 100%. 结果：171例困难气管切开病例均成功进行气管切开术，其中环甲膜切开7例，气管切开成功率100%25，无术中死亡病例发生。
