The Oro-Helical Length Accurately Predicts Endotracheal Tube Insertion Depth in Neonates

We evaluated the reliability of the oro-helical length in predicting the ideal endotracheal tube depth in neonates and found the oro-helical length was a consistently more reliable and better predictor of the ideal endotracheal tube depth on chest radiograph than the 7-8-9 rule, especially in infants weighing ≤1500 g.

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