SMA, IMA

Question 1

Levels of celiac trunk, SMA and IMA

Answer 1

Celiac trunk - T12
SMA - L1
IMA - L3

Question 2

Origin of SMA, level where it’s seen

Answer 2

origin - L1
seen - L3

Question 3

Structures supplied by the SMA

Answer 3

• Embryological midgut
• distal duodenum to proximal 2/3 transverse colon
• part of pancreas, distal half duodenum, jejunum, ileum, cecum, appendix, ascending colon, proximal 2/3 transverse colon

Question 4

Branches of SMA

Answer 4

• Inferior pancreaticoduodenal art. (ant and post)
• Jejunal branches
• Ileal branches
• Ileocolic artery
• Right colic artery
• Middle colic artery

Question 5

Landmark of SMA

Answer 5

crosses over third part of duodenum

Question 6

Where does the celiac trunk meet the SMA (embryological foregut meets midgut)

Answer 6

Celiac trunk –> Superior pancreaticoduodenal artery (ant + post)
SMA –> Inferior pancreaticoduodenal artery (Ant + Post)

Question 7

Structures supplied by IMA

Answer 7

• Distal 1/3 of transverse colon to superior aspect of rectum
• Distal 1/3 transverse colon, descending colon, sigmoid colon, rectum

Question 8

Branches of IMA

Answer 8

• Left colic artery
• Sigmoid arteries
• Superior rectal artery

Question 9

SMA meets IMA (FIX CARD)

Answer 9

SMA –> middle colic
IMA –> left colic