Lung ultrasound findings in congenital diaphragmatic hernia

Congenital diaphragmatic hernia (CDH) occurs in approximately 1 in 2500 to 5000 infants. The use of lung ultrasound (LUS) for its diagnosis has been reported in only two case reports. The aim of this study was to report the LUS pattern of CDH in a case series of infants with respiratory distress. This case series was part of a cohort enrolled in a larger prospective observational study. LUS was performed at the point-of-care during the first 24 h of life of the neonates and its operation time was measured. Seven cases (six left and one right CDH) were diagnosed. We found that the pattern of LUS for CDH diagnosis includes (1) partial absence of the hyperechoic line representing the normal diaphragmatic profile, (2) partial absence of the pleural line in the affected hemithorax, (3) absence of A lines in the affected area, (4) presence of multi-layered area with hyperechoic contents in motion (normal gut), and (5) possible presence of parenchymatous organs inside the thorax (i.e., liver or spleen).

Conclusion: A description of LUS pattern in infants with CDH is provided. LUS at the point-of-care may allow the prompt diagnosis of CDH and this is particularly useful in cases of missed prenatal diagnosis.