The best position of endotracheal tube in trachea is:-: (A) 3-4 cm above carina, (B) On carina, (C) Midway in trachea, (D) At cricoid
Answer is A. The proximal tip of endotracheal tube is best kept 3-4 cm above carina. If it is too deep it will become endobronchial. If it is too out then accidental extubation can happen.