Asthma Clinical Trial
Official title:
Factors Issued From Functional Exploration Associated to SAHOS in Asthmatic Children
There is an increase in the prevalence of obstructive apnea-hypopnea syndrome (OSA) in children for which the pathophysiological explanation is unknown. The main objective is to compare pharyngeal collapsibility in asthmatic children with SHS score > 2.75 or ≤ 2.75 (OSA prediction score validated in French). Secondary objectives: Compare pharyngeal size, tracheal size, loop gain and its components (controller, plant), lung volumes and expired and nasal NO in asthmatic children with SHS score > 2.75 or ≤ 2.75. The bias due to the possible existence of an alveolar hyperventilation syndrome associated with asthma will be taken into account.
Detailed measurements and questionnaires: Measurement of pharyngeal volume by acoustic pharyngometry in sitting and lying position with calculation of pharyngeal compliance. Measurement of ventilation (15 minutes) and transcutaneous PCO2 measurement, three apnea tests at the end of the test, hyperventilation test. PFT with spirometry and static volume measurement. Multiple flow measurement of exhaled NO with calculation of bronchial flow and alveolar fraction of NO. Nasal NO measurement. Questionnaires for OSA: the Pediatric Sleep Questionnaire (PSQ) and the SCR (Sleep Clinical Record). Questionnaires for functional respiratory disorder: French hyperventilation questionnaire SHAPE and the Nijmegen score ;
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