Anatomy · MU Sofia

Cardiovascular system · 130. System of the hepatic portal vein. Porto-caval anastomoses.

Describes the hepatic portal venous system, starting with the portal vein and its formation behind the neck of the pancreas, then the splenic, superior mesenteric and inferior mesenteric veins and their tributaries. Gives the anterior relations of the portal vein by duodenal part and lists the tributaries with their drainage areas. Ends with the porto-caval anastomoses, set out as four numbered routes through gastric, abdominal wall, posterior abdominal wall and rectal veins, with notes on varices.

Inside: 6 sections · 6 labelled pictures · 14 flashcards · 5 min

Topic 118 of 264 in the MU Sofia syllabus for Anatomy (Dental Medicine, Year 2). The free AceMed note covers it in 6 sections, about 688 words (5 min of reading), with 14 flashcards.

In this note

  1. SYSTEM OF THE HEPATIC PORTAL
  2. Portal vein :
  3. The Splenic vein :
  4. The superior mesentric vein :
  5. The inferior mesentric vein :
  6. PORTA-CAVAL ANASTMOSES

SYSTEM OF THE HEPATIC PORTAL

  • The portal venous system
  • Portal vein
  • Splenic vein
  • Mesentric veins

neck of pancreas (+)

  • The abdominal part of gut tube, spleen, pancreas, and gall bladder are drained by the portal venous system.
  • The portal venous syste delivers blood from these structures to liver to pass through hepatic sinusoids, then to the hepatic veins wich return the venous blood to the inferior vena cava just below the diaphragm.

* The lower part of the rectum is not drained by the portal venous system.

Portal vein :

Begins : behind the neck of pancreas by union of splenic and and superior mesentric veins.

Ends by giving right and left branches wich enter the liver parenchyma.

Portal vein is unique because it begins as vein (form by tubitires) but ends as an artery (gives branches).

The Splenic vein :

Begins : at the hilum of the spleen by union of many small splenic veins.

  • It passes to the right side in an straight course, in contact with the body of pancreas.
  • Ends : behind the neck of the pancreas by union with superior mesentric vein to form the portal v.

- Anterior relations of the portal v. :

Infra-duodenal Part : behind the neck of pancreas

Retro-duodenal Part : behind 1st part of duode, common bile duct, gastroduodenal artery.

Supra duodenal part : It is behind common bile duct and hepatic artery proper.

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