Extract: The total body plethysmograph method of DuBois et al. [7] for measurement of lung volume and airway resistance was adapted to the study of newborn infants. A Rendell-Baker mask directly ...

This technique was used in 15 infants and children under 6 months of age with symptoms of upper airway obstruction or apnea with a diagnosis of gastroesophageal reflux (GER) or laryngomalacia.