Effectiveness Assessments Tidal volume, train of four, heart rate, oxygen saturation, end-tidal carbon dioxide and chest rise will be used to evaluate the effectiveness of the study treatment Assessment of how difficult facemask ventilation actually was will use the method described by Warters(7). The Warters scale assigns points based on escalating levels of intervention necessary to ventilate the lungs. Additionally, the Warters scale accounts for situations in which a poor quality mask seal inhibits mask ventilation.