**5. Surgical airway**

Surgical airway intervention is applied in case of unsuccessful tracheal intubation and cannot intubate-cannot oxygenate situation. Percutaneous cricothyrotomy is the most commonly used procedure. Laceration development in the posterior tracheal wall is a mortal complication. Life-threatening tension pneumothorax, pneumomediastinum, mediastinitis, and progressive respiratory failure can occur when the posterior membranous part of the trachea is injured. Ultrasonography reduces the developmental risk of these complications [13]. However, Siddiqui et al. reported that airway damage might develop despite ultrasound guidance. Also, ultrasoundguided cricothyrotomy takes longer than the conventional technique [14].
