Defined as an increase in portal venous pressure >10 mmHg . Causes include thrombus, cirrhosis, venoocclusive disease and heart failure....
Defined as an increase in portal venous pressure >10 mmHg.
Causes include thrombus, cirrhosis, venoocclusive disease and heart failure.
The normal portal vein measures up to 13 mm in diameter with a hepatopetal flow rate of 12-30 cm/second, varying with respiration.
US
• Doppler to establish presence and direction of flow (flow <10 cm/second is abnormal).
• Portal vein diameter >15 mm is suggestive.
• Severe portal hypertension may cause flow reversal (hepatofugal).
• Check for portosystemic collaterals, splenomegaly and ascites.
CT
• Portosystemic collaterals (splenogastric, gastro-oesophageal, splenorenal, paraumbilical)
• Ascites
• Bowel/gallbladder oedema
• Splenomegaly
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