Forced Oscillations Technique During a Metacholine Test in Children

Inclusion Criteria: * Age between 6 and 16 years * FEV1 \> 60% * Child referred to the pulmonary function test laboratory for a non-specific bronchial hyperactivity test with methacholine * Child under treatment with inhaled corticosteroids stopped for at least 3 weeks * Oral consent from the child and at least one of the legal representatives * Child affiliated or benefiting from a social security plan Exclusion Criteria: * Use of a short-acting beta-adrenergic bronchodilator within the last 6 hours or anticholinergic bronchodilator within the last 12 hours * Use of a long-acting beta-adrenergic bronchodilator (licensed for use in children) in the past 36 hours * Upper or lower respiratory tract infections within 3 weeks prior to inclusion * Epilepsy under treatment * Subject's participation in another interventional study that may alter respiratory function * Patient unable to give consent, vulnerable