Asai T, Latto I P, Vaughan R S
Department of Anaesthetics, University of Wales College of Medicine, Heath Park, Cardiff.
Anaesthesia. 1993 Aug;48(8):667-9. doi: 10.1111/j.1365-2044.1993.tb07175.x.
The distance between the grille of the laryngeal mask airway and the vocal cords was measured with a fibreoptic bronchoscope in 30 male and 30 female patients. The mean distance was 3.6 cm (SD 0.5 cm; range 2.5-4.7 cm) in males and 3.1 cm (SD 0.5 cm; range 2.0-4.2 cm) in females. These results suggest that the cuff of an uncut 6.0 mm tracheal tube would often lie between the vocal cords when the tube is fully inserted through a laryngeal mask airway. To avoid this complication, the tracheal tube must protrude more than 9.5 cm beyond the grille of the laryngeal mask airway. When either neck extension or flexion is required, the laryngeal mask airway should be removed as the margin of safety is small.
使用纤维支气管镜对30例男性和30例女性患者测量喉罩气道格栅与声带之间的距离。男性的平均距离为3.6厘米（标准差0.5厘米；范围2.5 - 4.7厘米），女性为3.1厘米（标准差0.5厘米；范围2.0 - 4.2厘米）。这些结果表明，当6.0毫米未切割气管导管通过喉罩气道完全插入时，其套囊常常会位于声带之间。为避免这种并发症，气管导管必须突出于喉罩气道格栅之外9.5厘米以上。当需要颈部伸展或屈曲时，由于安全 margin 较小，应移除喉罩气道。 （注：原文中“margin of safety”直译为“安全边际”，在医学语境中可理解为安全范围等意思，这里意译为“安全范围”使译文更通顺）
