2.10. Randomization and masking
Thirty-nine patients will be randomly divided into 3 groups. Patients allocated in the control group (CG) will have the tube inserted in the conventional way, that is, the head is kept in the neutral position, while the tube is gently inserted through one of the nostrils, without any maneuver or instrument.Patients selected for the first intervention group (GI1) will have their heads turned to the right lateral position. This way, the tube will be inserted through the selected nostril without any neck maneuver or instrument.For patients selected for the second intervention group (GI2), a conventional adult laryngoscope will be orally inserted. The tracheal tube and tongue will be raised to provide the best view of the larynx area. Thus, after viewing the piriform sinus or the esophagus, the tube will be inserted into the patient nostril and advanced to the esophagus under direct visualization. The patient head will be held in the neutral position and the blade will be gently lifted to avoid excessive neck extension.