Ischaemic colitis

Question 1

blood supply to the colon

Answer 1

superior + inferior mesenteric arteries

Question 2

which areas are most susceptible to ischeamia?

Answer 2

watershed areas in the splenic flexure + caecum

Question 3

RF

Answer 3

**elderly (underlying atherosclerosis + vessel occlusion)

young (contraceptives, thrombophilia + vasculilts)

Question 4

Px

Answer 4

lower left sided abd pain + rectal bleeding, occasionally shock

Question 5

sigmoidoscopy

Answer 5

normal apart from blood

Question 6

Tx

Answer 6

conservative: fluid replacement + antibiotics

surgery for gangrene, perforation or stricture formation

Question 7

gold standard tests

Answer 7

colonoscopy + biopsy

Question 8

what usually causes it?

Answer 8

low flow in the inferior mesenteric artery

Question 9

what does the SMA supply

Answer 9

from the lower part of the duodenum through two-thirds of the transverse colon, as well as the pancreas

Question 10

what supplies the left 3rd of the transverse colon to proximal rectum

Answer 10

IMA