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When intubating a newborn, the aim was to place the endotracheal tube (ETT) in the midtrachea to allow for even distribution of ventilation and surfactant to both lungs. An ETT is considered correctly positioned if the tip is visible between the upper border of the first and the lower border of the second thoracic vertebra on chest x-ray (CXR).1 A number of methods are used to estimate the depth of insertion, including use of the vocal cord guide.2 ,3 The vocal cord guide was originally described as a 2-mm-wide solid black line added to neonatal ETTs with the upper border of the line at a distance of 24 mm, 26 mm and 28 mm …
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