Interarytenoid Notch Height Relative to the Vocal Folds Pilot Study

Abstract
We measured interarytenoid notch height (IANH) in 20 young children who required direct laryngoscopy under general anesthesia. By means of a specifically designed instrument, we found that the average IANH approximated 3 mm. Laryngeal incompetence on swallowing or in the presence of gastroesophageal reflux is associated with a low ianh (p < .0001). Therefore, ianh may be a measure of relative laryngeal incompetence.

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