What does the Paraumbilical vein drain into?

Superior and inferior epigastric veins are the efferents of umbilical varices. However, paraumbilical vessels may also anastomose with internal thoracic veins and drain into the superior vena cava.

Where does Paraumbilical veins drain into?

The paraumbilical veins are small veins around the falciform ligament that drain venous blood from the anterior part of the abdominal wall and diaphragm directly into the liver, and communicate with other anterior abdominal wall veins.

Which vein drains directly into the portal system?

liver sinusoid
Approximately 75% of total liver blood flow is through the portal vein, with the remainder coming from the hepatic artery proper. The blood leaves the liver to the heart in the hepatic veins….

What drains into the portal system?

The portal venous system drains the intestines, pancreas, and spleen with numerous collateral anastomoses to other venous beds of the abdomen.

What are paraumbilical veins?

The paraumbilical veins are thick-walled and of similar structure to the umbilical vein. Together they constitute an accessory portal system which is confined between the layers of the falciform ligament and is in communication with the veins of the ventral abdominal wall.

What is Hepatoportal system?

The hepatic portal system is the venous system that returns blood from the digestive tract and spleen to the liver (where raw nutrients in blood are processed before the blood returns to the heart).

What vein drains into the inferior vena cava?

Because the inferior vena cava is located to the right of the midline, drainage of the tributaries is not always symmetrical. On the right, the gonadal veins and suprarenal veins drain into the inferior vena cava directly. On the left, they drain into the renal vein which in turn drains into the inferior vena cava.

What veins make up the portal vein?

The portal vein forms from the confluence of the superior and inferior mesenteric veins, the splenic vein, gastric vein, and cystic vein.

Does the portal vein drain into the IVC?

The portal vein thus drains blood from most of the gastrointestinal tract. Blood then traverses the liver in the hepatic sinusoids and empties into the central veins through which it reaches the inferior vena cava.

Which veins drain into the hepatic portal vein?

Explanation: The hepatic portal vein is formed from the superior mesenteric vein, the inferior mesenteric vein, and the splenic vein.

Which vein connects with the paraumbilical veins?

In the course of the round ligament of liver, small veins (paraumbilical) are found which establish an anastomosis between the veins of the anterior abdominal wall and the hepatic portal, hypogastric, and iliac veins….

What is patent Paraumbilical vein?

A patent paraumbilical vein (PUV) is a frequent finding in patients with cirrhosis when studied by duplex Doppler ultrasound. There is controversy regarding the clinical significance of this finding.

Why does the paraumbilical vein drain to the femoral vein?

In patients with portal hypertension, the paraumbilical veins may become enlarged in order to reduce hepatic portal vein pressure by shunting blood to the superficial epigastric vein. The superficial epigastric vein drains to the femoral vein which ultimately drains into the inferior vena cava directly through…

Where are para-umbilical veins located in the body?

Para-umbilical veins – drain the skin of the umbilical region. The splenic vein is formed from a variety of smaller vessels as they leave the hilum of the spleen. Unlike the splenic artery, the splenic vein is straight and it maintains contact with the body of the pancreas as it crosses the posterior abdominal wall.

What causes recanalization of the paraumbilical vein?

Recanalization of the paraumbilical veins is mainly secondary to portal hypertension, which is defined as elevation of hepatic venous pressure gradient of >5 mmHg. Portal hypertension is a consequence of increased hepatic vascular resistance that can broadly be classified as prehepatic, intrahepatic or posthepatic.

Is the umbilical vein obliterated after birth?

Subsequently, there is atrophy of the right umbilical vein with the placental blood entering the liver via the left umbilical vein, which, following birth, is obliterated and the ductus venosus becomes the ligamentum venosum. 1 Contrary to popular belief, the umbilical vein itself generally does not recanalize with portal hypertension.