Biliary atresia echocardiography or ultrasound

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Ultrasound shows:

  • echogenic fibrous tissue anterior to the portal vein: triangular cord sign 5
    • represents ductal remnant of extrahepatic bile duct
  • hepatic artery changes
    • larger hepatic arterial caliber 2
    • subcapsular hepatic arterial flow on Doppler
    • right proximal hepatic artery diameter >1.5 mm
    • hepatic artery to portal vein diameter ratio >0.45
  • gallbladder ghost triad 4
  • gallbladder contraction index decreased for the age

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