Ultrasound Versus Age-Based Formula for Predicting Endotracheal Tube Size in Pediatric Patients Undergoing General Anesthesia: A Randomized Comparative Study.

Cureus · 2026 · PMC12936448 · PMID 41769566

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did not reach statistical significanceno p-value reported

The incidence of ETT exchange decreased in the ultrasound group, although this did not reach statistical significance.

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