Boidin M P
Br J Anaesth. 1985 Mar;57(3):306-10. doi: 10.1093/bja/57.3.306.
Airway patency was explored in patients breathing spontaneously under deep halothane anaesthesia. Opening and closing of the airway was observed with a flexible bronchoscope looking proximally from the nasopharynx at the epiglottis and the tongue. With the occiput elevated at various angles the smallest angle of retroflexion of the neck necessary to open the airway was measured. The influence of artificial airways on this angle of retroflexion was measured. Cadaveric preparations of the upper airway were studied to assess the mechanisms involved in airway patency. The results indicate that the epiglottis and not the tongue is the main cause of obstruction of the upper airway. When methods are applied to displace the hyoid anteriorly, the airway will be cleared on most occasions.
在深度氟烷麻醉下自主呼吸的患者中探讨气道通畅情况。使用可弯曲支气管镜从鼻咽部向近端观察会厌和舌头，以观察气道的开放和关闭情况。将枕部抬高到不同角度，测量打开气道所需的最小颈部后屈角度。测量人工气道对该后屈角度的影响。对上气道进行尸体解剖研究，以评估气道通畅所涉及的机制。结果表明，上气道阻塞的主要原因是会厌而非舌头。当采用方法向前移位舌骨时，在大多数情况下气道会通畅。
