Causes of Persistent Respiratory Distress in Term Neonates

Primary Respiratory Causes

The American Academy of Pediatrics recommends that meconium aspiration syndrome, neonatal pneumonia/sepsis, persistent pulmonary hypertension of the newborn, and respiratory distress syndrome are the most common causes of persistent respiratory distress in term neonates, with less common causes including pulmonary hemorrhage and congenital airway anomalies 1, 2
Meconium aspiration syndrome occurs in approximately 3-5% of neonates born through meconium-stained amniotic fluid, with post-term status significantly increasing risk 3
Surfactant replacement improves oxygenation and reduces severity of respiratory failure, air leaks, and need for ECMO in meconium aspiration syndrome, with a relative risk of 0.64 and a number needed to treat of 6 4, 5

The American Academy of Pediatrics states that congenital diaphragmatic hernia is associated with surfactant insufficiency due to altered pool sizes and kinetics, despite normal synthetic rates 4, 5
Administering surfactant to infants with congenital diaphragmatic hernia increases mortality, ECMO requirements, and chronic lung disease, and is therefore not recommended 5, 7
Bilateral choanal atresia occurs in 1 in 7,000-8,000 live births and requires immediate oropharyngeal airway or intubation within the first hours of life before surgical correction within the first days 7

The American Heart Association recommends that empiric antibiotics must be administered within 1 hour of sepsis identification 6
Inhaled nitric oxide at 20 ppm is first-line treatment for persistent pulmonary hypertension of the newborn, with ECMO reserved for refractory cases with oxygenation index >25 6
Metabolic alkalinization is critical during initial resuscitation as persistent pulmonary hypertension of the newborn can reverse when acidosis is corrected 6