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Cross Sectional > Lesson 4A > Flashcards

Lesson 4A Flashcards

1
Q

What do the couinaud segmental anatomy do? (2)

A
  1. Provides the basis for surgical resections

2. Diagnostic designation of lesions on US and CT

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2
Q

What is couinaud segmental anatomy based on?

A

Venous anatomy

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3
Q

What divides the couinaud segmental anatomy in the liver? (2)

A
  1. Both the hepatic veins

2. Portal vein

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4
Q

Why can each segment in the liver be resected without damage?

A

Because they are based on their blood supply

- each segment has its own porta hepatis

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5
Q

What is in the centre of each segment in the liver? (3)

A

A branch that consists of…

  1. Portal vein
  2. Hepatic artery
  3. Hepatic duct
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6
Q

What is in the periphery of each branch segment?

A

Vascular flow through the hepatic veins

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7
Q

How many segments are there in the couinaud segmental anatomy?

A

8

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8
Q

What is in segment 1 of the couinaud segmental anatomy?

A

Caudate lobe

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9
Q

Where is segments 2 and 3 of the couinaud segmental anatomy?

A

Left lateral lobe

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10
Q

Where is segment 4 on the couinaud segmental anatomy?

A

Medial left lobe

- divides into 4a (superiorly) and 4b (inferiorly)

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11
Q

Where is segment 5 and 8 of the couinaud segmental anatomy?

A

Right anterior lobe

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12
Q

Where is segment 6 and 7 on the couinaud segmental anatomy?

A

Right posterior lobe

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13
Q

What veins divide the segments 4a and 2 on the couinaud segmental anatomy?

A

Left hepatic vein

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14
Q

What veins divide the segments 7 and 8 on the couinaud segmental anatomy?

A

Right hepatic vein

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15
Q

What veins divide the left and right lobe of the liver?

A

Middle hepatic vein

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16
Q

What do the portal veins divide?

A

The upper (superior) and lower (inferior) portions

17
Q

What does the right hepatic vein divide?

A

The right lobe into anterior and posterior sections

18
Q

What plane does the middle hepatic veins run from?

A

The IVC to the gallbladder

- sagittally

19
Q

What does the left hepatic vein divide?

A

The left lobe into medial and lateral sections

20
Q

Which portal vein is more superior?

A

Left portal veins

21
Q

What do the hepatic veins do?

A

They drain blood from the segments and lobes of the liver into the IVC

22
Q

Where are the hepatic veins located?

A

Interlobar and intersegmental

23
Q

Where are you on the liver if you can see the hepatic veins?

A

Superior

24
Q

What are the superior segments of the liver? (5)

A
  1. 7
  2. 8
  3. 4a
  4. 2
  5. 1
25
Q

What does it mean if you can still see the portal vein?

A

This tells you you have not yet reached segments 5 and 6

- because the left portal vein is more superior than the right portal vein

26
Q

What do you see if you are more in the mid region of the liver?

A

The IVC and hepatic veins more distally

27
Q

What segments are above the portal vein? (2)

A
  1. 2

2. 4a

28
Q

What segments are below the portal vein? (2)

A
  1. 3

2. 4b

29
Q

What does it mean when you can see the right portal vein?

A

We are between segments 7 and 8 superiorly and 6 and 5 inferiorly

30
Q

What is the horizontal divider for segments 4a/4b and 2/3?

A

The left hepatic vein

31
Q

What does it mean when the hepatic veins are superficial and you can see some organs?

A

You are quite inferior

- 6, 5, 4b, and 3 segments

32
Q

What does IV mean?

A

4

33
Q

What does VI mean?

A

6

34
Q

What does VII mean?

A

7

35
Q

What does VIII mean?

A

8

Cross Sectional (54 decks)

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