Where is the Portacaval anastomosis?
A portocaval anastomosis is a specific type of anastomosis that occurs between the veins of the portal circulation and those of the systemic circulation. The inferior end of the esophagus and the superior part of the rectum are potential sites of a harmful portacaval anastomosis.
Where does portal vein drain into?
the liver
The portal vein (PV) is the main vessel of the PVS, resulting from the confluence of the splenic and superior mesenteric veins, and drains directly into the liver, contributing to approximately 75% of its blood flow [1]. Hepatic artery provides the remaining hepatic blood flow.
What is the difference between hepatic vein and portal vein?
The liver has a dual blood supply. The portal vein (which is rich in nutrients and relatively high in oxygen) provides two thirds of blood flow to the liver. The hepatic artery (which is oxygen-rich) supplies the rest. The hepatic veins drain the liver into the inferior vena cava.
What are the 3 hepatic veins?
Three large intrahepatic veins drain the liver parenchyma, into the inferior vena cava (IVC), and are named the right hepatic vein, middle hepatic vein and left hepatic vein. The veins are important landmarks, running in between and defining the segments of the liver.
What hepatic veins carry?
hepatic vein, any of a group of veins that transports blood from the liver to the inferior vena cava, which carries the blood to the right atrium of the heart.
Where are Portacaval nodes?
Portacaval lymph nodes, in the narrow space between the portal vein and inferior vena cava were identified as well-defined oval soft tissue structures. The nodes were identified as separate from vascular structures, dilated common bile duct, or enlarged medial papillary process of the caudate lobe of the liver.
Where is the Portacaval located?
The portacaval space is a relatively narrow region between the portal vein and the inferior vena cava that is usually well seen on cross-sectional abdominal imaging studies [1].
Which is the best description of portacaval anastomosis?
Portacaval anastomosis. Other names. Porto-systemic anastomosis Portal caval system. A portocaval anastomosis is a specific type of anastomosis that occurs between the veins of the portal circulation and those of the systemic circulation .
Where are the two systems of anastomosis located?
The major areas where the two systems anastomose are the following: Is the area where veins of the abdomen meet the azygos system. The esophageal branch of the portal circulation includes the left gastric vein which arises from the the portal vein.
Where is the anastomosis between the omental and colonic veins?
The anastomosis between omental and colonic veins (portal veins) with the retroperitoneal veins (systemic veins) in the region of hepatic and splenic flexure. Another anastomosis is between the ductus venosus (portal vein) and the inferior vena cava (systemic vein). This is very rare and at the site of patent ductus venosus.
What happens to the anastomoses in portal hypertension?
Portacaval anastomosis. In portal hypertension, as in the case of cirrhosis of the liver, the anastomoses become congested and form venous dilatations. Such dilatation can lead to esophageal varices and hemorrhoids. Caput medusae can also result. Clinical presentations of portal hypertension include: