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A portosystemic shunt or portasystemic shunt (medical subject heading term; PSS), also known as a liver shunt, is a bypass of the liver by the body's circulatory system.It can be either a congenital (present at birth) or acquired condition and occurs in humans as well as in other species of animals.
A TIPS procedure decreases the effective vascular resistance of the liver through the creation of an alternative pathway for portal venous circulation. By creating a shunt from the portal vein to the hepatic vein, this intervention allows portal blood an alternative avenue for draining into systemic circulation.
HMD is sometimes misdiagnosed as Portosystemic vascular anomaly (PSVA) or a "Liver Shunt" (portosystemic shunt). HMD can be diagnosed with an MRI, using a tracing dye in the subject's blood, and observing the flow of blood through the subject's liver and surrounding areas (stomach, intestine) for anomalies.
A portacaval shunt (portal caval shunt) is a treatment for high blood pressure in the liver. A transjugular intrahepatic portosystemic shunt (TIPS) is an artificial channel within the liver that establishes communication between the inflow portal vein and the outflow hepatic vein. It is used to treat portal hypertension.
The portacaval shunt connects the portal vein to the inferior vena cava, allowing blood to travel directly from the portal vein to the inferior vena cava, bypassing the liver entirely. The shunt is typically used to manage complications of portal hypertension, such as upper gastrointestinal bleeding. However, technological advancements have ...
Transjugular intrahepatic portosystemic shunt procedures, or TIPS involve decompressing the portal vein by shunting a portal venule to a lower pressure systemic venule, under guidance with fluoroscopy. Since it treats the root cause of portal hypertension gastropathy, it has been putatively used for the condition.
A liver shunt in dogs, also known as a portosystemic shunt (PSS), is a condition where blood bypasses the liver. Usually, blood from the digestive tract will flow through the liver before ...
Ammonia is normally metabolized by the liver; as cirrhosis causes both decreased liver function and increased portosystemic shunting (allowing blood to bypass the liver), systemic ammonia levels gradually rise and lead to encephalopathy. [139] Most pharmaceutical approaches to treating hepatic encephalopathy focus on reducing ammonia levels. [140]