^{The aim of the study is to determine the correct insertion depth of tracheal tube by measuring distance between vocal cords and upper end of endotracheal tube cuff by ultrasound when the black marker on the endotracheal tube is placed just below the vocal cords.}

^{Seventy three patients will be enrolled for the study.}

^{Written informed consent will be taken from patients.}

^{Patients will be selected according to the inclusion and exclusion criteria.}

^{Preoperatively USG to identify vocal cords will be done and post intubation,ETT cuff will be inflated with saline and post intubation USG to identify distance between Vocal cords and Proximal end of ETT cuff will be done.}

^{Primary objective is to measure the distance from the vocal cords to proximal end of ET tube by USG when the black marker on the endotracheal tube is placed just below the vocal cords.}