What are the sites of Portacaval anastomosis?
The site of this anastomosis is the upper part of the anal canal. The anastomosis between the paraumbilical veins, which run in the ligamentum teres as portal veins, and small epigastric veins, which are systemic veins. The site of this anastomosis is the umbilicus.
Where are the four sites of the portal systemic anastomoses?
|Site of Anastomosis||Clinical Sign||Portal ↔ Systemic|
|Umbilicus||Caput medusae||Paraumbilical ↔ superficial, inferior, and superior epigastric|
|Rectum||Anorectal varices (someterims referred to as internal hemorrhoids though they are different)||Superior rectal ↔ middle and inferior rectal|
Which veins form the Portacaval anastomosis?
- Portal Vein Formed by union of (behind the neck of pancreas) 1. Superior Mesenteric Vein 2. Splenic vein Tributaries: 1. Left gastric vein 2.
- SITES OF PORTACAVAL ANASTOMOSIS Five sites of portal/systemic circulation : 1. Lower third of the Esophagus 2. Paraumbilical Area 3.
What are included in the portal systemic anastomoses?
The major portal-systemic anastomoses include: 1) esophageal branches of left gastric vein with esophageal veins, 2) superior rectal vein with middle and inferior rectal veins, 3) paraumbilical veins with subcutaneous veins of anterior abdominal wall, 4) retroperitoneal veins with venous branches of veins of the colon …
What is Portacaval lymph node?
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.
What is a portal vein?
(heh-PA-tik POR-tul vayn) A blood vessel that carries blood to the liver from the intestines, spleen, pancreas, and gallbladder. Also called portal vein.
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 is Cava caval anastomosis?
Portocaval anastomoses (or portocaval shunts) are connections between portal system and the system of superior and inferior vena cava. Importance of portocaval clutches applies in the case of portal hypertension. Extended and varicose veins pose a risk of rupture and life- threatening bleeding.
Where are paraumbilical veins?
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.
What is the portacaval area?
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 .
Where are portacaval nodes?
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 is another name for portocaval 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 .
What is portacaval anastomosis 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:
What is the function of the porto systemic anastomosis?
Function of the porto-systemic anastomosis. Provide alternative routes of venous blood circulation when there is a blockage in the liver or portal vein. Ensure that venous blood from the gastrointestinal tract still reaches the heart through the inferior vena cava without going through the liver.
Where is the anastomosis located?
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.