Gender and Proper Size of Oropharyngeal Airway: Pilot Study

The purpose of this study is to assess the adequacy of mask ventilation with the different sized-oropharyngeal airway.

Inclusion Criteria:

• adult patients undergoing surgery that requires general anesthesia

Exclusion Criteria:

• anticipated difficult intubation
• patients without teeth or with loose teeth
• cervical spine disease
• body mass index over 35 kg/m2
• pregnancy