Comparison Between a Standard Tube and the Ultra-thin Tritube for Intubation of the Trachea and for Maintaining Access to the Trachea After Anaesthesia, in Patients With an Expected Difficult Direct Laryngoscopy

Exclusion Criteria

• •Patient with increased secretions in the airway (Pneumonia, bronchitis, productive cough)
• •Patients planned for awake intubation
• •Patients where mask-ventilation is judged to could become impossible
• •Patients where access to the cricothyroid membrane is judged to be difficult or impossible
• •Patients in ASA (american Society of Anaesthesiologists) physical classification status \>3
• •Patients who are scheduled for rapid sequence induction (RSI) due to risk of aspiration
• •Patients with stridor
• •Patients with hypoxemia (Saturation \< 90 % in room air)
• •Operation duration planned to \> 2.5 hours
• •Patients with the need for a nerve-stimulation-tube during surgery