What is Known:
• Bronchiolitis is the main cause of lower respiratory tract infection in children younger than 24 months.
• Ultrasound can evaluate the lung parenchyma without ionizing radiations.
What is New:
• Lung ultrasound may be a useful diagnostic tool to define the prognosis of the infants affected by bronchiolitis if performed at the first assessment in the emergency department.
• The score obtained at the ultrasound evaluation is higher in those who will need oxygen therapy during admission for more time and in those who will need respiratory support with helmet continuous positive airway pressure.