What is Cavocaval anastomosis?
Cavocaval anastomoses They are the links between v. cava superior and v. cava inferior. Blood can flow in both directions, depending on the placement of the obstacle.
Where do Portosystemic anastomosis occur?
The site of this anastomosis is the lower oesophagus. The anastomosis between the superior rectal veins, which are portal veins, and the inferior and middle rectal veins, which are systemic veins. The site of this anastomosis is the upper part of the anal canal.
What is caval caval shunt?
A portacaval shunt (or portal caval shunt) is a treatment for portal hypertension. A connection is made between the portal vein, which supplies 75% of the liver’s blood, and the inferior vena cava, the vein that drains blood from the lower two-thirds of the body.
What are retroperitoneal veins?
portacaval anastomoses formed from veins in the walls of retroperitoneal viscera, such as the ascending and descending colon, passing to the tributaries of the inferior vena cava in the posterior body wall instead of those of the portal vein.
Is Portacaval anastomosis harmful?
The inferior end of the esophagus and the superior part of the rectum are potential sites of a harmful portacaval anastomosis. In portal hypertension, as in the case of cirrhosis of the liver, the anastomoses become congested and form venous dilatations.
What are portosystemic collaterals?
Portosystemic shunts, also known as portosystemic collaterals, are abnormal communications between the portal system and the systemic circulation, and such shunts can be congenital or acquired(7,8). Congenital shunts can be intrahepatic or extrahepatic, and their classification is complex.
Where does left gastric vein come from?
The left gastric vein (or coronary vein) is a vein that derives from tributaries draining the lesser curvature of the stomach.
What is Gastrocaval shunt?
ANATOMIC CLASSIFICATION SYSTEM FOR VARICES The second most common pathway is through a direct gastrocaval shunt where the gastric varices drain through the inferior phrenic vein or pericardiophrenic vein directly into the inferior vena cava (IVC).
What is caval system?
Definition. A type of anastomoses which occurs between the veins of portal circulation and veins of systemic circulation. Supplement. Examples of this are: esophageal varices, haemorrhoids, and caput medusae.
What vein drains the small intestine?
The mesenteric veins parallel their corresponding arteries. The SMV drains the small intestine, cecum, and ascending and transverse colon via the jejunal, ileal, ileocolic, right colic, and middle colic veins.
What is the mesenteric vein?
The superior mesenteric vein (SMV) is a large blood vessel in the abdomen. Its function is to drain blood from the small intestine as well as the first sections of the large intestine and other digestive organs. This large vein receives blood from several other veins (tributaries) in the digestive tract.