Evaluate for other causes of<unk><unk>  (e.g. pneumonia, congenital heart disease, etc.)
CXR: homogenous opaque infiltrates, air bronchograms, decreased lung volumes
Respiratory distress syndrome
Meconium aspiration syndrome
Acute respiratory distress syndrome
Transient tachypnea of the newborn
Pneumonia
Tracheostomy complications
Sepsis
Bronchopulmonary dysplasia