Suction Catheter as a Guide for Nasotracheal Intubation Under General Anesthesia

a suction catheter will be first inserted through the ETT so that about 10 cm of the catheter was protruding from the distal end of the tube. The tip of the catheter is then inserted through the selected nostril until it passes to the pharynx. If resistance is felt to the passage of catheter, the other nostril will be tried. The nostril with less resistance to the catheter passage will be chosen for the completion of the procedure. The Endotracheal tube is then advance over the catheter through the nasal passage while holding the catheter proximal to the tube to prevent its advancement with the tube. After the tube tip reach to the pharynx, the suction catheter is withdrawn and tracheal intubation will be completed.