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Pediatric Airway & Anesthesia

Airway Balloon Dilation Sizing

Age-based airway dimensions for laryngotracheal balloon dilation, or estimate target diameters from a custom outer diameter (larynx = OD + 1 mm, trachea = OD + 2 mm).

Age-based dimensions

Patient age

{{ ageLabel }}

Age-appropriate ETT

OD of ETT

Larynx diameter

Trachea diameter

Select a balloon matched to the target airway diameter; avoid over-dilation. Confirm endoscopically.

Custom outer diameter

Target larynx diameter = OD + 1 mm; target trachea diameter = OD + 2 mm.

Outer diameter (mm)

Larynx target

Trachea target

Based on outer diameter {{ customOd }}.

Sizing reference

Age	ETT	OD	Larynx	Trachea
{{ r.age }}	{{ r.ett }}	{{ r.od }}	{{ r.lar }}	{{ r.tra }}

Disclaimer. For educational and reference use by qualified clinicians only. Confirm airway dimensions endoscopically and individualize balloon selection. Does not replace clinical judgment.