Blood Suppy to GIT Flashcards
What is the blood supply to the cervical part of the oesophagus?
Inferior Thyroid Artery - From thyrocervical trunk - From 1st part of subclavian a.
What is the blood supply to the thoracic part of the oesophagus
Esophageal branch from the Thoracic Aorta
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
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.
What is the main arterial supply of the mouth
External Carotid A
Common Carotid A
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
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
Which part of the stomach does the left gastric a. supply
Lesser curvature
What are the branches of the Left Gastric A
Oesophageal and Gastric branches
What are the branches of the Splenic A.
Numerous pancreatic A
Short gastric
Post. gastric
Left gastro-omental
Which artery runs in the gastrosplenic ligament
Left gastro-omental
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)
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
Which is the artery that supplies the gallbladder
Cystic A. from the Right Hepatic A.
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
What is the origin of the superior mesenteric artery
1cm below coeliac trunk
At L1 vertebra
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
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
What is the origin of the Inferior Mesenteric Artery
At L3 vertebra
4cm above bifurcation of Aorta
What are the branches of the Inferior Mesenteric Artery
Left Colic
Sigmoidal
Superior Rectal (essentially continuation of IMA)
What does the Left Colic A. supply
Branch of Inferior Mesenteric A.
Supplies Distal 1/3 of Transverse Colon
What is the embroylogical derivative of the GIT
Endodermal in origin
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)
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)
