The identified formulas were comparatively simple to apply but were validated only for pediatric patients older than 1 year. Using tubes with a cuff can minimize the problem of optimal tube size. If a tube without a cuff is intended to be used other sizes should also be available.

Insertion success rate is high with both LMA and LT in the age group studied. The airway leak pressure, serving as an estimate to judge quality of airway seal, is higher with the LT.