Ischaemic colitis most commonly affects the splenic flexure because this area lies at the junction of two arterial territories. What is this watershed zone called?
- A Griffiths' point ✓
- B Sudeck's point
- C Duchenne's point
- D Treitz's angle
Correct answer: A. Griffiths' point
Explanation
Griffiths' point is the watershed at the splenic flexure where the terminal branches of the middle colic artery (superior mesenteric territory) meet the ascending branch of the left colic artery (inferior mesenteric territory). Sudeck's point is the other colonic watershed, located at the rectosigmoid junction between the last sigmoid branch and the superior rectal artery. The splenic flexure is the single most common site of colonic ischaemia.
Reference: Bailey and Love's Short Practice of Surgery, 27th ed.
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