The purpose of this study is to determine whether a specific airway clearance technique, l'Expiration Lente Prolongée (ELPr), induces or aggravates gastro-oesophageal reflux in infants under the age of one year. Infants referred to hospital for a multichannel intraluminal impedance pH (pH-MII) monitoring are included in this study. Participation is only possible after signing the informal consent by one of the parents.
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number of refluxes
Timeframe: 20 minutes