The cervical collar is fitted and positioned once the patient is asleep in addition to a dedicated oropharyngeal cannula (Ovassapian fiberoptic intubating airway cannula) in order to guide the aScope® or fiberscope in the oropharynx. The timer is activated once the investigating physician takes the aScope® or fiberscope in his hands. The device is advanced into the airway with visual control on the LCD screen for the aScope® or on an external dedicated screen for the fiberscope. Once in the trachea, the device will serve as a guide for introduction of the orotracheal tube, according to standard fiberscopic intubation technique. Tracheal intubation is confirmed through visualization of the distal end of the tube into the trachea, the onset of an end tidal CO2 curve and auscultation. The timer will be stopped at the onset of the end tidal CO2 curve.