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Flashcards in Blood Suppy to GIT Deck (35):
1

What is the blood supply to the cervical part of the oesophagus?

Inferior Thyroid Artery - From thyrocervical trunk - From 1st part of subclavian a.

2

What is the blood supply to the thoracic part of the oesophagus

Esophageal branch from the Thoracic Aorta

3

What are are the main arteries that supply the Intra-abdominal part of the GIT

Branches from the Aorta on the anterior aspect

Foregut: Celiac Trunk

Midgut: SMA

Hindgut: IMA

4

What makes up the foregut, midgut and hindgut

The midgut is from below the Major Duodenal Papillae up until the distal 1/3 of the Transverse Colon
Work out the rest.

5

What is the main arterial supply of the mouth

External Carotid A
Common Carotid A

6

What is the origin of the Celiac Trunk and what are its branches?

From just below the aortic hiatus at T12

Branches:
Left gastric
Common hepatic
Splenic

7

What are the relations of the Celiac Trunk

Anterior:
-Omental bursa

Right side:
-Right CCeliac Ganglion
-Right Crus of the Diaphragm
-Caudate Process of Liver

Left side:
-Left celiac Ganlion
-Left crus of Diaphragm
-Cardia of Stomach

Inferior:
-Upper border of Pancreas
-Splenic vein

8

Which part of the stomach does the left gastric a. supply

Lesser curvature

9

What are the branches of the Left Gastric A

Oesophageal and Gastric branches

10

What are the branches of the Splenic A.

Numerous pancreatic A
Short gastric
Post. gastric
Left gastro-omental

11

Which artery runs in the gastrosplenic ligament

Left gastro-omental

12

What are the branches of the Common Hepatic A

Right gastric

Gastroduodenal:
-Right gastro-omental
-Ant/post superior pancreaticoduodenal

Small Pyloric
Hepatic Artery Proper (Terminal and then splits)
Cystic A (from Right Hepatic A)
Supraduodenal (sometimes)

13

In which functional lobe does the caudate and quadrate lobes lie

Functional Left Lobe
Sections 1-4

Sections 5-8 make up the Functional Right Lobe

14

Which is the artery that supplies the gallbladder

Cystic A. from the Right Hepatic A.

15

What makes up the foregut that the coeliac trunk supplies

Abdominal GIT until the part of descending duodenum at the opening of the bile duct.

Liver and Gall Bladder
Greater Part of Pnacreas (Head, Neck and Body)
Spleen

16

What is the origin of the superior mesenteric artery

1cm below coeliac trunk
At L1 vertebra

17

What are the SMA relations

Posterior to:
-neck of pancreas
-Splenic vein

Anterior to:
-Left renal vein
-Uncinate process of pancreas
-3rd part of duodenum

18

What are the branches of the SMA

Inferior Pancreatocoduodenal
Middle Colic
Right Colic (Marginal Colic comes off this)
Jejulnal Branches
Ilieal Branches

Ileocolic Trunk
-Ileal branch
-Caecal branch
Appendicular branch

19

What is the origin of the Inferior Mesenteric Artery

At L3 vertebra
4cm above bifurcation of Aorta

20

What are the branches of the Inferior Mesenteric Artery

Left Colic
Sigmoidal
Superior Rectal (essentially continuation of IMA)

21

What does the Left Colic A. supply

Branch of Inferior Mesenteric A.

Supplies Distal 1/3 of Transverse Colon

22

What is the embroylogical derivative of the GIT

Endodermal in origin

23

What supplies the Distal Segment of the Anal Canal

Middle Rectal A (From the Inferior Vesical A of Internal Iliac)
Inferior Rectal A (of Internal Pudendal A of Internal Iliac)

24

What are the points of Arterial Anastomoses of the GIT

1:
-Superior Pancreaticoduodenal A. (of Coeliac)
-Inferior Pancreaticoduodenal A (of SMA)

2:
-Middle Colic A (of SMA)
-Left Colic A (of IMA)

3:
-Superior Rectal A (of IMA)
-Inferior Rectal A (of Internal Pudendal A)

25

What are the sites of Porto-systemic Anasomoses

Gastro-oesophageal Junction
Anorectal Junction
Paraumbilical Region
Bare Area of Liver
Colic Flexures
Visceral Surface of Liver

26

Explain the anastomosis at the Gastro-oesophageal junction

Portal:
-Oesophageal tributaries from Left Gastric Vein

Systemic:
-Oesophageal br. (drain into Azygous Vein)

Clinical:
-Oesophageal or gastric varices

27

Explain the anastomosis at teh Anorectal Junction

Portal:
-Superior Rectal V

Systemic:
-Middle and Inferior Rectal Veins

Clinical:
-Rectal varices / Haemorroids / Piles

28

Explain the anastomosis at the Paraumbilical Junction

Portal:
-Persistant Umbilical V (due to high pressure)

Systemic:
-Peri-umbilical brances (of Sup. and Inf. Epigastric Veins)

Clinical:
-Caput Medusae

29

Explain the anastomosis at the Bare Area of the Liver

Portal:
-Branches of the Right Portal Vein, lying in liver tissue exposed to bare area

Systemic:
-Retroperitoneal Veins (drain into Lumbar, Azygos and Hemiazygos Veins)

Clinical:
-Dilated veins at risk during surgery

30

Explain the anastomosis at the Colic Flextures

Portal:
-Omental V.
-Colonic V.

Systemic:
-Retroperitoneal V. (drain into veins of Ant. Abd. Wall)

Clinical:
No clinical name

31

Explain the anastomosis at the visceral surface of liver

Portal:
-Patent ductus venosus (patent due to high pressure)

Systemic:
-IVC

Clinical:
-Is rare

32

Which artery can get in the way of surgery due to duodenal ulcerations

Gastroduodenal Artery

33

Which arteries of the GIT are "end arteries" that can cause fibrosis to organs if occluded?

Splenic Artery
Appendicular Artery

34

What is the cause of Left Sided Varicocele

Pressure of SMA on Left Renal Vein

35

What is the cause of Chronic Duodenal Ileus?

Pressure of SMA on duodenum.
Also called Superior Mesenteric Syndrome