Final answer:
A decrease in portal hypertension indicates that the LeVeen shunt is effective in a client with cirrhosis of the liver.
Step-by-step explanation:
Following insertion of a LeVeen shunt in a client with cirrhosis of the liver, an assessment finding that indicates the shunt is effective is a decrease in portal hypertension. Cirrhosis can cause obstruction of blood flow through the liver, leading to portal hypertension. The shunt allows blood to bypass the liver and return to the heart via an alternate route, reducing portal hypertension. This can be assessed by monitoring the client's blood pressure and signs of hepatic encephalopathy, such as confusion or altered mental status.