口腔颌面部手术后发生上呼吸道梗阻时,病人不能平卧,常呈端坐呼吸,或头垂向前下方,不敢改变体位或烦燥不安。虽可采用粗针头插入环甲膜的急救措施,但毕竟通气量有限,难于维持有效的呼吸,紧急气管切开努在必行。但常规手术体位为平卧、头后仰。如采取这种体位必然加重呼吸困难,窒息感更明显。尽管时间不长,病人也无法 Oral and maxillofacial surgery, upper airway obstruction, the patient can not lie down, often was sitting and breathing, or head down to the front, not to change the position or irritable. Although the needle can be inserted into the ring of rough first aid measures, but after all, ventilation is limited, difficult to maintain effective breathing, emergency tracheostomy is imperative. However, the general surgical position for supine, head back supine. Such as taking this posture will inevitably increase breathing difficulties, a sense of asphyxia more obvious. Even though the time is not long, the patient can not