Author:
Mikael Häggström [notes 1]
Evaluation
Signs of portal vein hypertension are:
- Portal vein measurement and Doppler:
- Dilated portal vein: >13 mm (sensitivity 42%, specificity 95-100%)[1]
- Slow portal venous flow on Doppler: <15 cm/sec[1]
- Reversal or alternating directions of portal venous flow[1]
- Portal venous thrombosis
- cavernous transformation of the portal vein,[1] appearing like multiple veins.
- Increased velocity in hepatic artery[1]
- Corkscrew appearance of hepatic arteries[1]
Doppler ultrasonography of the portal vein over 5 seconds, showing peaks of
maximal velocity, as well as points of
minimal velocity.
- Superior mesenteric and splenic vein Doppler:
- Dilated superior mesenteric vein and splenic vein of > 10mm.[1] These should be measured during deep inspiration since it may vary with respiration.[1]
- Loss of respiratory variation in superior mesenteric vein and splenic vein on spectral Doppler[1]
- Re-canalisation and hepatofugal paraumbilical venous flow.[1]
- Portalisation of hepatic vein flow on Doppler[1]
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.
References
