To analyze the ultrasonic manifestations of congenital diaphragmatic hernia in children and to investigate its diagnostic value.

Between January 2012 and January 2019, 30 children with congenital diaphragmatic hernia admitted to Tunchang people's hospital were selected. Patients were diagnosed with left and right diaphragmatic hernia and hernia contents by ultrasonic and radiological techniques, and the accuracy of the diagnosis of congenital diaphragmatic hernia in children was confirmed by surgery.

The results of the surgery showed that among the 30 children with congenital diaphragmatic hernia, 26 had left hernia and 4 had right hernia. Hernia contents were cavity organs in 9 cases and cavity and substantial organs in 21 cases. The sonographic findings of the children with congenital diaphragmatic hernia were disruption of the diaphragm echo in the upper abdomen, and the lower boundary of the lung was shifted upward. By scanning the back and side of the thorax and waist to isolate the lung, we could see the mixed echo area of the chest cavity which was not connected with other lung tissues. Through the abdominal scan, the cavity organ hernia showed a relatively empty abdominal cavity, substantial organ hernia, and in the normal position it could not show the organ structure. The X-ray findings of the children with congenital diaphragmatic hernia showed a semicircular mass shadow above the diaphragm, the heart and trachea shifted to the healthy side, and the abdomen was relatively empty and dense. The accuracy rate of ultrasonic diagnosis for position of diaphragmatic hernia, and hernia contents (100.00% and 90.00%) was significantly higher than that of X-ray (93.33% and 56.67%, P<0.05).

Ultrasonic diagnosis can estimate the position and contents of congenital diaphragmatic hernia in children through echo and image structure, and its accuracy rate is significantly higher than that of X-ray, which is worthy of clinical promotion.