The Articulating Oral Airway (AOA) is a novel oral airway which actively displaces the tongue, allowing for a greater cross-sectional area for mask ventilation. The investigators hypothesize that, in patients with predictors for difficult mask ventilation, the AOA will be non-inferior to the Geudel oral airway in terms of expired tidal volumes.
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Expiratory Tidal Volume (Breaths 6-10)
Timeframe: Measured immediately after placement of each oral airway; an average of 2-5 minutes.