Evaluation of characteristics of left-sided colorectal perfusion in elderly patients by angiography

Figure 4 Demonstration of the colonic hemoperfusion region by angiography of the inferior mesenteric artery. The arrows represent the inferior mesenteric artery (IMA) perfusion to the proximal region of the colon. A: IMA perfusion exceeded the splenic flexure and reached the transverse colon; B: IMA perfusion only achieved the splenic flexure and stopped; C: IMA perfusion reached only the descending colon with the left colic artery; D: IMA perfusion reached only the descending colon without the left colic artery.