Delayed Resorption of Pulmonary Alveolar Fluid in the Neonate

Abstract

Chest radiographs obtained on neonates within two hours after birth were evaluated to determine the radiographic findings associated with delayed resorption of pulmonary alveolar fluid. Findings included prominent central vascular markings, widened or prominent interlobar fissures, hyperaeration, mild cardiomegaly, and pleural effusions. These findings were common in asymptomatic neonates. Infants with abnormal findings were evaluated for associated conditions; none except hypoproteinemia were demonstrated to be significant. This suggests that reduced oncotic pressure in pulmonary capillaries and lymphatics causes delayed resorption of pulmonary alveolar fluid. Tachypnea is not a constant clinical feature in this syndrome.