Fig. 1From: Bedside rapid placement of nasointestinal feeding tube via ultrasound-guided stylet positioning in critical COVID-19 patientsThe location of the trachea (T), carotid artery (A), nasointestinal tube (T1), and esophagus (E) (a). Tram-track signs with stylet (S) in the longitudinal section (b). The stylet (S) tip in pylorus in the longitudinal section (c). Abdominal plain radiograph showed the tip of the tube (d)Back to article page