Lesson 5B (Part 1) Flashcards Preview

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Flashcards in Lesson 5B (Part 1) Deck (33)
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1

What makes the portal venous system unique? (4)

1. Liver has dual blood supply
2. System includes all veins that drain blood from the spleen, pancreas, GB and GI tract
3. Supplies approximately 80% of the liver's blood supply
4. Disruption to the flow can cause multiple adverse effects

2

What happens when blood gets to the liver?

It goes through detoxification and metabolize

3

How much oxygen is supplied to the livers blood supply?

About half

4

What does the portal venous system include? (8)

1. SMV
2. IMV
3. SV
4. MPV
5. Intrahepatic portal veins
6. HVS
7. IVC
8. Tributaries

5

What happens to the portal venous blood?

It gets filtered twice

6

Where does the portal venous blood get filtered? (2)

1. Capillaries
2. Liver

7

Where do portal veins terminate?

In the sinusoids of the liver

8

What doe portal veins do?

Deliver blood to the hepatic veins and in turn to the IVC
- which then transports blood to the heart

9

Is the MPV intra or extrahepatic?

Both
- when its not in the liver its extra and when its in the liver its intra

10

How long is the MPV?

5-6cm long

11

What is the diameter of the MPV?

< 13mm

12

Confluence is directly posterior to which part of pancreas?

Neck

13

What can be seen anterior to MPV near hilum?

CBD

14

What make up the portal triad? (3)

1. Hepatic artery
2. Bile ducts
3. Portal veins

15

Why is the MPV easy to distinguish?

Because it is enclosed by a sheath of connective tissue with a high collagen content that gives it a echogenic appearance

16

What does the SMV drain? (4)

1. Small and large intestine
2. Stomach
3. Pancreas
4. Appendix

17

How does the SMV run? (2)

1. Right lateral to SMA
2. Parallel and RT lateral to IMV

18

What is rare for the SMV?

Thrombosis

19

What can thrombosis in the SMV cause?

Mesenteric ischemia
- can be fatal

20

How does the IMV lie?

Vertical oblique orientation

21

How does the SMV lie?

Vertical oblique orientation

22

What does the IMV drain? (3)

1. Large intestines
2. Sigmoid colon
3. Rectum

23

Where does the IMV terminate?

Upon entry into the splenic vein

24

Where does the IMV run?

Left lateral to SMV

25

Is the splenic vein intra or retroperitoneal?

Intraperitoneal

26

What does the splenic vein drain? (3)

1. Spleen
2. Branches of pancreas
3. Stomach

27

Where does the splenic vein lie compared to the splenic artery?

Inferoposterior

28

Where does the splenic vein run?

Medially from the spleen and unites posterior to pancreas neck with the SMV at the confluence

29

Which portal vein is longer?

Left

30

Which portal vein is larger?

Right