Portacaval shunt

Medical Dictionary

portacaval shunt n.
Any of various communications between the portal vein and the general circulation, especially a surgical anastomosis between the portal vein and the vena cava.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
portacaval shunt

noun
shunt that is created surgically between the portal vein and the inferior vena cava so that blood from the abdominal organs can bypass the liver 
WordNet® 3.0, © 2006 by Princeton University.
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