The investigators will compare conventional intubation using Macintosh laryngoscope, blind
endotracheal intubation using i-gel for conduit and bronchoscopic intubation using
Ambu-aScope and i-gel. All situation assumed as cardiac arrest. i.e, someone give chest
compressions continuously without interruption.
Moreover the investigators will compare the type of endotracheal tube. Reinforced tube has
more soft tube tip, so the investigators think it is more acceptable for intubation using
i-gel as conduit.