Items tagged “portal vein”

Portal vein thrombosis may be seen in a variety of clinical contexts, and when acute can be a life-threatening condition. It is a major cause of non-cirrhotic presinusoidal portal hypertension. Portal vein thrombus may be either bland and/or malignant (i.e. tumour thrombus), and it is a critical...

Cavernous transformation of the portal vein (CTPV) is a sequela of portal vein thrombosis and is the replacement of the normal single channel portal vein with numerous tortuous venous channels. For a discussion of demographics and presentation, please refer to the article on portal vein thrombo...

​Congenital portosystemic shunts are rare, extrahepatic or intrahepatic, anatomical abnormalities shunting blood from the portal venous system to the systemic venous system and, thus, avoiding passage through the hepatic acinus. Terminology The term “portosystemic shunt” can be used to refer t...

This congenital intrahepatic portosystemic shunt classification was proposed by Park et al. in 1990 1: type 1: single large vessel of constant diameter connecting the right portal vein to the Inferior vena cava type 2: localised, peripheral shunt with one or more communications in a single hep...

This congenital extrahepatic portosystemic shunt classification was proposed by Morgan and Superina in 1994 1: type 1: complete diversion of portal blood into the Inferior vena cava with congenital absence of the portal vein 1a: superior mesenteric vein and splenic vein do not join to form a c...

The portosystemic shunt ratio is a measure performed using ultrasound to quantify the abnormal flow of portal venous blood that is shunted away from the hepatic sinusoidal circulation in the context of a congenital portosystemic shunt 1. Ultrasound The ratio is determined using the following e...