Figure 1From: A feasibility study on bedside upper airway ultrasonography compared to waveform capnography for verifying endotracheal tube location after intubation Tracheal intubation. The images show endotracheal intubation (ETT) in correct position, as seen in the horizontal view (I); the arrow indicates two hyper-echoic lines, which means the ETT is inside the trachea. On the vertical view (II), two symmetrical hyper-echoic lines indicate the ETT.Back to article page