Where does the nurse expect the obstruction to be in a patient with extrahepatic portal hyperten-sion?
a. Sinusoids
b. Bile ducts
c. Hepatic portal vein
d. Hepatic artery
ANS: C
Extrahepatic (prehepatic) portal venous obstruction causes extrahepatic portal hypertension in children. Sinusoids can be inflamed but would not lead to hypertension. Obstruction of the bile ducts would lead to interruption in the flow of bile to the duodenum; it would not cause hyper-tension. The obstruction is in the vein, not the artery.
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