Oropharyngeal leak pressure is defined as the airway pressure at which air leaks into the mouth or enters the stomach (Hughes et al., 2012). This feature is the most common primary outcome parameter used to evaluate the safety and efficacy of supraglottic airway devices because high pressures generally indicate that adequate ventilation can be achieved without air leakage during positive pressure ventilation at high inspiratory pressures (Teoh et al., 2010).