Experimental study of blood supply of the left half of colon for prevention of ischemic complications in resection of infrarenal abdominal aortic aneurysm

The purpose of this study was to examine the characteristics of blood supply of the left half of the colon in the experiment using a novel technique to prevent ischemic complications after resection of infrarenal abdominal aortic aneurysm. The study was performed on 18 human corpses. Newlydesigned special marker compound (MC) was intraarterially injected subsequently into the superior mesenteric, internal iliac and inferior mesenteric arteries. Upon every injection, the samples of the proximal sigmoid colon wall at the certain anatomical levels were taken for further examination by the method of INCA Energy 250 energydispersive microanalysis using the electron microscope JSM6390 LV JEOL. Lead concentrations in the samples from the tested parts of the colon were estimated. Maximal lead concentration level in the wall of the proximal sigmoid colon was found after the MC injection into the inferior mesenteric artery (17.27±2.68%) followed by the lower lead concentrations in the territories of the internal iliac (1.60±0.64%) and superior mesenteric (1.01±0.28%.) arteries. It was found that the blood supply of the distal part of the colon (descending colon, sigmoid colon, and rectum) through the internal iliac arteries was the second in order of value after the inferior mesenteric artery. Our observations confirm the importance of determining the indications for reimplantation of these arteries into the vascular prosthesis branches in the aortic aneurism resection to prevent ischemic complications. The developed method based on intra arterial MC infusion provides an opportunity for reliable assessment of the degree of arterial involvement in the blood supply of selected areas of biological tissue.