Lesson 1A (Part 1) Flashcards Preview

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Flashcards in Lesson 1A (Part 1) Deck (30)
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1

What does couinauds anatomy allow?

Evaluation of liver in multiple planes so that radiologist can precisely localize a lesion to a given segment in the report to a surgeon

2

What is the couinauds anatomy based on?

The portal system

3

What does each segment in the couinauds anatomy have?

Its own blood supply
- artery
- portal vein
- hepatic vein

4

What are the functions of the liver? (7)

1. Produces most proteins needed by the body
2. Metabolizes or breaks down nutrients for food to produce energy when needed
3. Stores certain vitamins, minerals and sugars
4. Produces bile
5. Produces most of the substances that regulate blood clotting
6. Immune Function
- fight infection by removing bacteria from the blood
7. Removes potentially toxic byproducts of certain medications

5

What makes up the triad in the liver? (3)

1. Portal vein
2. Hepatic artereis
3. Bile duct

6

What does the hepatic artery do?

Supplies oxygenated blood

7

What does the portal vein do? (2)

1. Supplies WBC
2. Returns flow to the liver from the intestines for cleansing

8

What does the central vein do?

Drains old blood back to the hepatic veins

9

What are the branches of the celiac artery?

1. Common hepatic artery
2. Left gastric artery
3. Left splenic artery

10

What forms the main portal vein/portal confluence? (2)

1. SMV
2. Splenic vein

11

What does the hepatic veins do?

Drains blood from the liver into the IVC, that is deoxygenated and returns it to the cardiopulmonary system for rejuvenation

12

What is the exception for normal doppler flow in the liver?

The right descending portal
- hepatofugal

13

Hepatofugal

Flow directed away from the liver

14

Hepatopetal

Flow directed towards the liver

15

Which structure separates the medial and lateral left lobe?

Left intersegmental fissure

16

Which structures lie within the left intersegmental fissure? (3)

1. Cranially
- LHV
2. Middle
- Ascending LPV
3. Caudally
- ligamentum teres

17

The hepatic veins are visualized when scanning which portion of the liver?

Superior

18

What does the MHV separate?

Anterior right lobe and medial left lobe

19

What borders on each side of the RHV?

Anterior and posterior RL

20

What is the name of the capsule surrounding the liver?

Glisson’s capsule

21

Why is there a bare area on the liver?

Lacks peritoneum

22

What does the right lobe measure to be?

13-17cm

- varies due to body type

23

When is the liver considered an abnormal size?

>14cm
- compare to kidneys for more proof

24

What is the echogenicity of the liver compared to the kidney?

Slightly hyperechoic

25

What is the echotexture of the liver?

Homogenous

26

What is the contour of the liver?

Smooth borders

27

What is the flow of the portal venous?

Hepatopetal

28

What kind of flow are the hepatic veins? (2)

1. Phasic flow
- somewhat pulsatile due to their proximity to the heart
2. Hepatofugal

29

What kind of flow are the hepatic arteries?

Hepatopetal
- should have low resistance

30

What can the main portal vein not be greater than for an AP measurement?

13mm
- 1.3 cm