Morphological considerations on the origin and morphometry of the internal iliac arteries

The origin of the internal iliac artery, right and left, was studied in 76 cases, 58 cases of male (76.32% of all cases) and 18 female cases (23.68% of all cases). The origin of the internal iliac arteries was considered in relation to the spine (lumbar-sacral). The right internal iliac artery males originates in a range from the upper edge of L4 vertebra - the lower part of fin sacral. It is found that in males, in most cases, 43 cases (74.14% of male cases), right internal iliac artery originates at different levels of sacral fin. We considered that the right iliac artery low origin only the cases in the lower part of the fin sacral, 10 cases (17.24% of male cases). Cases of high origin of the artery, above the fin sacral we found it in 15 cases (25.86% of male cases). From high origins, in the upper edge of the L4 vertebra and intervertebral disc at L4-L5, I met only one single case. Right internal iliac artery in females originated in a range between the upper edges of L5 - the lower part of sacral fin. In females, the right internal iliac artery origin, is located within narrower than in men, but in women, most frequently, 14 cases (77.78% of female the cases) was the origin of the internal iliac located at different levels of sacral fin. The females have not met internal iliac origin above the L5 vertebra or intervertebral disc level L4-L5. High origin was met it in 4 cases (22.22% of female the cases) and low origin in 6 cases (33.33% of female the cases). The level of the left internal iliac artery origin we studied 78 cases, finding it in the same range as in males, i.e., the upper edge of L4 vertebra - the front of the sacrum. In males, on a number of 57 cases (73.08% of all cases) the origin of the left internal iliac artery was made between the upper edge of the vertebra L4 - the front face of the sacrum, most commonly, in 44 cases (77 19% of male the cases) located in the sacral fin. The artery high origin I found it in 9 cases (15.79% of male the cases) and low origin in 18 cases (31.58% of male the cases). I have not met artery origin at L5-S1 intervertebral disc. In terms of low origin, only in males, the left internal iliac artery originated from the anterior to the sacrum, something not found the right internal iliac artery.

In females, the 18 cases followed, had their origins in the range lower half of the L5 - middle sacral fin, 17 cases (94.44% of female the cases), terminating at the sacral fin. It is found that in women the origin of the left internal iliac artery is within narrower than the other cases described so far, showing the highest level of origin, this artery in females do not possess low origin. The high origin is present in a small percentage, only 5.56% of cases, encountering any case the origin of the left internal iliac artery is located at the L4 vertebra or the intervertebral discs at L4-L5 or L5-S1. Internal iliac artery diameter was followed on 90 cases, 44 cases for the right internal iliac artery and 46 cases for left internal iliac artery. In males, the right internal iliac artery I found a caliber between 3 to 9.8 mm. In women the right internal iliac artery caliber found between 3.9 to 6.9 mm.