Hepatic Portal Vein Flashcards

Explore the hepatic portal vein, including its formation, course, tributaries, intrahepatic branches, anatomical relations, and clinical significance.

Card 1 of 30Question

What is the hepatic portal vein?

A large vein that carries blood from the abdominal digestive organs, spleen, pancreas, and gallbladder to the liver.

In This Section

1. What is the hepatic portal vein?

A large vein that carries blood from the abdominal digestive organs, spleen, pancreas, and gallbladder to the liver.

2. Which two veins usually unite to form the hepatic portal vein?

The superior mesenteric vein and splenic vein.

3. Where is the hepatic portal vein usually formed?

Posterior to the neck of the pancreas.

4. At approximately which vertebral level is the hepatic portal vein formed?

Near L1 to L2, with anatomical variation.

5. What is the approximate length of the main hepatic portal vein?

Approximately 6 to 8 cm in adults, with individual variation.

6. What is the usual course of the hepatic portal vein?

It ascends superiorly and rightward toward the porta hepatis, passing behind the proximal duodenum and within the hepatoduodenal ligament.

7. Which part of the duodenum lies anterior to the hepatic portal vein?

The superior first part of the duodenum.

8. Which peritoneal ligament contains the upper portion of the hepatic portal vein?

The hepatoduodenal ligament, forming the thickened free edge of the lesser omentum.

9. What three major structures form the portal triad?

The hepatic portal vein, proper hepatic artery, and common bile duct.

10. What is the position of the hepatic portal vein within the portal triad?

Posterior to the proper hepatic artery and common bile duct.

11. Which portal triad structure usually lies anterior and to the right of the portal vein?

The common bile duct.

12. Which portal triad structure usually lies anterior and to the left of the portal vein?

The proper hepatic artery.

13. Which opening lies immediately posterior to the hepatoduodenal ligament?

The epiploic foramen, also called the omental foramen.

14. Where does the hepatic portal vein usually divide into its terminal branches?

At or near the porta hepatis of the liver.

15. What are the two principal terminal branches of the hepatic portal vein?

The right and left portal veins.

16. Which hepatic sectors are supplied by the right portal vein?

The right anterior and right posterior hepatic sectors.

17. Which Couinaud segments are primarily supplied by the left portal vein?

Segments II, III, and IV, with variable branches to segment I.

18. Which portal vein branch usually has a longer transverse intrahepatic course?

The left portal vein.

19. Which veins commonly drain directly into the main hepatic portal vein?

The left gastric, right gastric, and cystic veins, although their termination patterns vary.

20. Where does the inferior mesenteric vein usually drain before blood enters the hepatic portal vein?

Into the splenic vein, although drainage into the superior mesenteric vein or portal confluence also occurs.

21. Does the hepatic portal vein normally contain functional valves?

No. The hepatic portal vein is normally valveless.

22. What proportion of the liver's total blood flow is normally delivered by the portal vein?

Approximately 70% to 75%.

23. What happens to portal venous blood after it enters the liver?

It flows through progressively smaller portal branches into hepatic sinusoids, where it mixes with hepatic arterial blood.

24. How does blood from the hepatic portal vein eventually return to the heart?

Through hepatic sinusoids, central veins, hepatic veins, the inferior vena cava, and the right atrium.

25. How is the hepatic portal vein formed embryologically?

Through remodeling of the paired vitelline veins and their anastomoses around the developing duodenum.

26. What is portal hypertension?

An abnormal elevation of pressure within the portal venous circulation, commonly caused by cirrhosis.

27. What is portal vein thrombosis?

Formation of a thrombus within the hepatic portal vein or its branches, potentially obstructing blood flow to the liver.

28. What is cavernous transformation of the portal vein?

Development of multiple collateral veins around a chronically obstructed portal vein.

29. Which imaging technique is commonly used to assess portal vein patency and blood flow direction?

Doppler ultrasonography.

30. Why is the hepatic portal vein clinically important during the Pringle maneuver?

Compression of the hepatoduodenal ligament temporarily interrupts portal venous and hepatic arterial inflow to the liver.