Week 6 - Anatomy of Intestines Flashcards Preview

GI > Week 6 - Anatomy of Intestines > Flashcards

Flashcards in Week 6 - Anatomy of Intestines Deck (30):
1

What is the most common site of duodenal ulcers?

-Superior duodenum (duodenal cap)

2

Which part of the duodenum contains the major duodenal papilla?

-Descending

3

What is DJ flexure?

-Deuodenaljejunal flexure between ascending duodenum and jejunum

4

What is the suspensory muscle of duodenum?

-Located at DJ flexure contration of this muscle increases the angle to facilitate movement of intestinal contents

5

What are the two major causes of duodenal ulcers?

-H.Pylori
-Chronic NSAID use

6

What are 2 possible complications of duodenal ulcers?

-Erosion into the gastroduodenal artery
-Perforation of the bowel leading to peritonitis

7

What is the ileocecal junction?

-Where ileum invaginates into cecum to form ileocecal valve

8

What is the function of ileocecal valve?

-Prevent reflux

9

Describe the arterial supply and venous drainage of the small bowel

-Duodenum before major duodenal papilla ->gastroduodenal
-Duodenum after MDP-> inferior pancreaticoduodenal
-Jejunoileum -> SMA branches into arcades ->vasarecta
-Venous drainage follows the arteries into HPV

10

Where does the IMV drain into?

-Splenic vein

11

Describe the branches of the SMA

-Ileocecal
-Right colic
-Middle colic
->anastamose to form marginal artery

12

From which side of the aorta does the SMA arise?

-Right

13

What are paracolic gutters?

-Empty spaces next to the ascending/descending colon where fluid can collect

14

Where would to cecum be palpated if enlarged?

-RIF

15

What are the flexures in the colon?

-Hepatic on the right
-Splenic on the left

16

What are the 3 types of tenia? What is there function?

-Omental
-Mesocolic
-Free
-Large strips of muscle which contract to shorten the wall of the bowel and form haustra

17

Where is the appendix?

-Joint to the cecum

18

What are haustra?

-Pouches formed by tenia coli

19

What is the rectal ampulla?

-Widest part of the rectum

20

What are omental appendices?

-Small fat filled pouches of peritoneum which cover the colon

21

What is the watershed area in the colon?

-Splenic flexure -> Most susceptible to ischaemia when bp is low as there is no direct blood supply -> only served by anastamoses

22

What is the pouch of douglas?

-A space in women formed by the posterior wall of the uterus and the rectum

23

What is the retro-vesicle pouch?

-A space in men formed by posterior wall of bladder and colon

24

What is the significance of the pouches in the pelvis?

-Fluid can accumulate here during disease

25

What is the main function of the colon?

-Water reabsorption

26

What is appendicitis?

-Acute inflammation of the appendix

27

Where is the tenderness felt in appendicitis once localised?

-Mc Burneys point

28

What is the cause of appendicitis?

-Proliferation of lymphoid tissue, faecolif, helminth, causes blockage
-Stasis of contents and multiplication of bacteria

29

Describe the branches of the IMA

-Left colic
-Sigmoid
-Becomes superior rectal
-> anastamose to form marginal artery

30

How is the duodenum connected to the liver?

-Hepatoduodenal ligament