Confirmation and reproducibility of endotracheal tube position by tracheal ultrasonography in preterms: expert versus trainee.

Abbreviations AOP Apnea of prematurity CHDS Congenital heart diseases CXR Chest X-ray DBP Diastolic blood pressure ET Endotracheal ETT Endotracheal tube EtCO 2 End-tidal carbon dioxide GA Gestational age GCS Glasgow Coma Scale HR Heart rate HS Highly significant ICS Intercostal space NICU Neonatal intensive care unit PDA Patent ductus arteriosus PHTN Pulmonary hypertension POCUS Point-of-care ultrasound RDS Respiratory distress syndrome RR Respiratory rate SAT Oxygen saturation SBP Systolic blood pressure TUS Tracheal ultrasound/ultrasonography US/USG Ultrasound/ultrasonography Authors' contributions MI and ME conceived the idea and wrote the study design; all the authors developed the study protocol.

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