The American Academy of Pediatrics recommends a permissive hypoxaemic target for an oxygen
saturation of 90% for children with bronchiolitis, which is consistent with the WHO recommendations for targets in
children with lower respiratory tract infections. No evidence exists to support this threshold. We aimed to assess
whether the 90% or higher target for management of oxygen supplementation was equivalent to a normoxic 94% or
higher target for infants admitted to hospital with viral bronchiolitis