目的：环甲膜切开选择性代替气管切开的可行性。
Objective: to investigate the feasibility of Selsctive cricothyroid laryngotomy instead of incision of trachea.
目的：比较行环甲膜穿刺表麻与否对全麻鼻腔盲探插管的影响。
VE:To compare the effect between general anesthesia by nasal cavity blindly intubation with and without topical anesthesia through thyrocricocentesis in maxillofacial operations.
结论：环甲膜穿刺置管术治疗紧急喉梗阻安全有效、简便易行。
No complication was found after operation. Conclusion: This surgical procedure is safe, effective and easy for acute laryngeal obstruction.
结论：环甲膜穿刺置管术治疗紧急喉梗阻安全有效、简便易行。
No complication was found after operation. Conclusion: This surgical procedure is safe, effective and easy for acute laryngeal obstruction.
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