有个案系列和个案报告指出喉头罩在面罩苏醒球和气管插管两者皆无效时，可以建立有效的气道。

Case series and case reports suggest that the LMA can provide an effective rescue airway during resuscitation if both BMV and ETT have been unsuccessful.

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喉头罩和气管插管之间没有统计学上显著的差异，除了插管完成的时间稍快一些，但并无明显差异。

There was no statistically significant difference between the LMA and ETT with the exception of a clinically insignificant difference in time to complete insertion of the device favouring the ETT.

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