TableĀ 1

SMA injuries, Fullen zone classification, and their associated bowel segments1 27

ZoneSegment SMAIschemic riskBowel affected
ITrunk proximal to 1st branchMaximalJejunum, ileum, right colon
IITrunk between inferior pancreaticoduodenal and middle colicModerateMajor segment, small bowel, right colon
IIITrunk distal to middle colicMinimalMinor segment or segments, small bowel or right colon
IVSegmental branches (jejunal, ileal, colic)NoneNone
  • SMA, superior mesenteric artery.