With the left hand, insert the endotracheal tube along the left side of the patient's mouth and between the two fingers (Figures 16-1 & 16-2).1,5 Alternatively, the endotracheal tube can be advanced between the two fingers and the tongue. Gently advance the tip of the endotracheal tube into the patient's trachea (Figure 16-2). Do not advance the endotracheal tube if any resistance is encountered. Partially withdraw the endotracheal tube and reattempt to insert it into the patient's trachea. Alternatively, withdraw the endotracheal tube completely, bend it more sharply, and then attempt to insert it into the trachea. Have an assistant withdraw the stylet if one was used. Advance the endotracheal tube approximately 3 to 4 cm.1,8 While securely holding the endotracheal tube with the left hand, gently withdraw the right hand from the patient's mouth. Inflate the cuff of the endotracheal tube. Begin ventilating the patient while securely holding the endotracheal tube and confirming proper placement.