Normative Growth Data for the External Diameters of the External and Internal Iliac Arteries in Human Fetuses - An Anatomical, Digital and Statistical Study
Journal Title: Advances in Clinical and Experimental Medicine - Year 2012, Vol 21, Issue 2
Abstract
[b]Background. [/b]Normative data on the diameters of the aorto-iliac segment are extremely useful in the diagnosis and monitoring of prenatal arterial variants and pathologies. [b]Objectives. [/b]The present study describes age-specific reference intervals and normal growth curves for the external diameters of the external and internal iliac arteries. [b]Material and Methods.[/b] Using anatomical dissection and digital-image analysis, the normal growth of the external diameters of the external and internal iliac arteries was studied in 124 spontaneously aborted human fetuses, aged 15–34 weeks. [b]Results.[/b] Neither sex differences nor laterality differences were found. The external diameters of the external iliac arteries increased from 0.31 ± 0.06 to 1.41 ± 0.31 mm on the right, and from 0.29 ± 0.04 to 1.37 ± 0.24 mm on the left, and generated the following growth curves of best fit: y = 0.665 – 0.056 x Age + 0.002 x Age2 ± 0.143 (R2 = 0.82) and y = 0.612 – 0.052 x Age + 0.002 x Age2 ± 0.118 (R2 = 0.86), respectively. The external diameters of the internal iliac arteries were found to be statistically larger than those of the external iliac arteries (p = 0.0000). The external diameters of the internal iliac arteries ranged from 0.44 ± 0.07 to 2.04 ± 0.43 mm on the right, and from 0.44 ± 0.06 to 1.83 ± 0.43 mm on the left, and modeled the following quadratic functions: y = 1.524 – 0.127 x Age + 0.004 x Age2 ± 0.242 (R2 = 0.74), and y = 1.391 – 0.117 x Age + 0.004 x Age2 ± 0.220 (R2 = 0.76), respectively. The right external iliac arteries (in 71% of the cases) and the right internal iliac arteries (in 65.3% of cases) were larger in external diameter. [b]Conclusions.[/b] The values of the external diameters of the external and internal iliac arteries are independent of sex. A strong trend towards higher values for the right external and internal iliac arteries is noted. The external diameter of the internal iliac artery is nearly 1.5 times greater than that of the external iliac artery. Surprisingly, normal growth of the external diameters of the external and internal iliac arteries follows quadratic functions.
Authors and Affiliations
Michał Szpinda, Anna Szpinda
Keywords
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