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Young children with bronchiolitis must rely largely on supportive care because few treatments have proved effective. Nasal continuous positive airway pressure (CPAP) has shown promise as a treatment for infants with bronchiolitis, but it is often poorly tolerated. Treatment with high-flow nasal cannulae (HFNC) allows delivery of up to 8 liters per minute of heated, humidified air with or without an increased oxygen concentration and has been proposed as a treatment option. In a retrospective chart review, researchers compared infants (age, <24 months) with bronchiolitis who were admitted to a pediatric intensive care unit (PICU) during successive winters before (57 infants) and after (58 infants) HFNC treatment was available (51 infants act…