lecture 7 Flashcards
Abdominal scarecrow:
- Abdominal aorta (starts at T12) = continuation of thoracic aorta
- Use the scarecrow – all single, unpaired structures supply the gut (2,3 and 6 not 9)
- All paired branches – supply abdominal wall and other structures
Abdominal aorta aneurysms
- Localised enlargement of the abdominal aorta, where the diameter of the aorta at that particular level is more than 50% of its normal size
- Or the Diameter > 3cm
- Different types
- Back pain, pulsations in abdomen
- Associated with thoracic aorta and popliteal aneurysms
- Risk factors: Male, smoking, high blood pressure, family history
Celiac artery origin
arises from the aorta and passes below the median arcuate ligament
Sup mesenteric artery origin
originates from the aorta between the celiac artery and renal arteries
Inf mesenteric artery origin
comes off the anterolateral aspect of the left side of the aorta.
Foregut contains
Lower part of oesophagus, stomach, 2/3rds duodenum
Liver, spleen, gallbladder, pancreas
Foregut arteries:
Supplied by coeliac trunk; drained by splenic artery
Note anastomosis around stomach:
Left and right gastric arteries and left and right gastroomental* arteries
Celiac trunk branches
left gastric artery
splenic artery
common hepatic artery
- Left gastric artery
-Smallest branch
Its ascends across the diaphragm, giving rise to the oesophageal branches before continuing anteriorly along the lesser curvature of the stomach
It forms an anastomosis with the R gastric artery
- Splenic artery
- Direct branch of celiac trunk
- Travels towards the spleen, behind the stomach
- On its course, it gives off →left gastroomental artery and short gastric arteries
- Supplies the larger curve of the stomach
- Common hepatic artery
- Goes to general area of liver
→ Proper hepatic artery (only supplies liver) → cystic artery (gall bladder); left and right hepatic arteries
→ Right gastric artery (origin may vary) – supplies other part of the lesser curvature of the stomach
→ Gastroduodenal artery (part of stomach and duodenum)
→ Supradudenal artery
→ Right gastroomental artery (forms anist. With L on greater curve of stomach)
→ Superior pancreaticoduodenal artery (pancreas and duodenum)
Midgut
- Midgut stretches from last 1/3rd of duodenum, jejenum, ileum, cecum & appendix, ascending colon, 1st 2/3rd of tv colon
Midgut blood supply
Supplied by superior mesenteric artery; drained by superior mesenteric vein
Superior mesenteric artery
(midgut)
- Jejenual and ileal branches (small intestine)
- Ileocolic artery → appendicular br (ilium and colon)
- Right colic artery (ascending colon)
- Middle colic artery (transverse colon)