Hulka: Intestine Flashcards Preview

Block 3 Week 2 Meg > Hulka: Intestine > Flashcards

Flashcards in Hulka: Intestine Deck (78)
Loading flashcards...
1

First portion of the small intestine

duodenum

2

Where does the duodenum begin?
Where does it end?

after the pylorus of the stomach
ends at the ligament of Trietz

3

What is the duodenum considered in relation to the peritoneum?

It is retroperitoneal

4

How many divisions is the duodenum divided into?

four divisions

5

The first portion of the duodenum is referred to as the duodenal (blank). How long is this segment? What is it continuous with? What is its relation to the peritoneum?

bulb; 2-3cm; pylorus; intraperitoneal

6

What three structures lie posterior to this first portion of the duodenum?

1. common bile duct
2. gastroduodenal artery
3. inferior vena cava

7

What can cause ulcers to develop in the duodenal bulb?

Increased acid from the stomach entering the bulb

8

Ulcers of the posterior side of the duodenum can perforate or bleed. What artery is typically the source of the bleeding?

gastroduodenal

9

The second portion of the duodenum is referred to as the (blank)

The C loop

10

How long is the second portion of the duodenum? What is its relation to the peritoneum?

8-10cm
retroperitoneal

11

What two significant things drain into the second portion of the duodenum? Through what structure do they enter?

common bile duct and pancreatic duct
enter through the ampulla of Vater

12

The third portion of the duodenum is referred to as the (blank) portion

horizontal

13

Where does the third portion of the duodenum end?

Where the superior mesenteric vessels cross

14

The third portion of the duodenum is where the duodenum proceeds over the (blank) from right to left

spine

15

Where does the fourth portion of the duodenum begin? Where does it end?

Begins to the left of the superior mesenteric vessels
Ends at the ligament of Trietz

16

How long is the fourth portion of the duodenum in length? What is it referred to as?

2-3cm; ascending portion

17

The fourth portion of the duodenum becomes the (blank)

jejunum

18

2 arteries that supply the duodenum

superior pancreaticoduodenal from the gastroduodenal artery
inferior pancreaticoduodenal from the SMA

19

Where does most of the venous drainage from the duodenum go?

into the superior mesenteric vein to enter the portal system (recall, blood from bowels is filtered by the liver before entering the IVC)

20

What is malrotation of the gut? What is a symptom of this?

When the intestine fails to return to the fetus in a rotated position during development; bilious vomiting

21

Where do the jejunum and ileum begin and end?

Begin at the ligament of Trietz and end at the ileocecal valve

22

How long are the jejunum and ileum together? How much of the total is thought to be jejunum?

6-7 meters; first 2/5ths

23

External differences between the jejunum and ileum

jejunum is thicker and more muscular
jejunum is more proximal
ileum is more distal

24

Internal differences between jejunum and ileum

circular folds (plicae) are large and well developed in the jejunum

25

What do the jejunum and ileum hang from?

A mesentery with blood vessels and lymphatics

26

Emanates from superior mesenteric vessels and fans out with the bowel along the edge of the mesentery

Root of mesentery

27

When you lift up the transverse colon, what do you expose? (PIMP question)

ligament of Trietz

28

What artery supplies the entire jejunum and ileum?

Superior mesenteric artery

29

How many branches does the SMA branch into to supply the jejunum and ileum?

15-18 branches

30

What two arrangements of vessels arise in the mesentery supplying the jejunum and ileum?

arterial arcades and straight vessels (vasa recta)