Abstract: This study discusses the application value of ultrasound in the diagnosis and treatment of neonatal obstructive jaundice. Eighty-two neonates with obstructive jaundice were selected. There were 39 cases of biliary atresia and 43 cases of hepatitis syndrome. The diameter of gallbladder in children with biliary atresia was significantly smaller than that in children with hepatitis syndrome (P<0.05), while the diameter of right hepatic artery, the diameter ratio of right hepatic artery to portal vein and TC syndrome were significantly higher than those in children with hepatitis syndrome (P<0.05). The flow velocity of portal vein in children with biliary atresia was significantly lower than that in children with hepatitis syndrome (P<0.05), while the portal vein congestion index and hepatic artery resistance index were significantly higher than those in children with hepatitis syndrome (P<0.05). Logistic regression analysis was established for gallbladder length, right hepatic artery diameter, right hepatic artery/portal vein diameter ratio, TC sign, portal vein velocity, portal vein congestion index and hepatic artery resistance index, the sensitivity and specificity of diagnosis of biliary atresia were 94.87% and 93.02%. Ultrasound has good application value in the diagnosis of neonatal obstructive jaundice and can provide help for differential diagnosis of biliary atresia and hepatitis syndrome.

Key words: neonatal, obstructive jaundice, biliary atresia, hepatitis syndrome, differential diagnosis