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The Effect of Arterial Elongation on Isolated Common Iliac Artery Pathologies
Ádám Szőnyi1, Balázs Bence Nyárády1, Márton Philippovich1
1Heart and Vascular Center, Semmelweis University, 1122 Budapest, Hungary.
Insights
Iliac artery occlusions occur in straighter vessels, while aneurysms develop in more elongated systems. Vessel geometry significantly impacts common iliac artery (CIA) pathologies.
Area of Science:
- Vascular Surgery
- Radiology
- Biomedical Engineering
Background:
- Common iliac artery (CIA) pathologies, including stenosis, occlusion, and aneurysms, significantly impact patient health.
- Understanding the relationship between vessel geometry and CIA pathologies is crucial for diagnosis and treatment.
Purpose of the Study:
- To investigate the influence of vessel geometry on steno-occlusive and dilatative common iliac artery (CIA) pathologies.
- To differentiate geometric characteristics between CIA stenosis, occlusion, and aneurysm groups.
Main Methods:
- Retrospective analysis of 100 participants, including 60 with unilateral CIA pathology (stenosis, occlusion, aneurysm) and 40 controls.
- 3D reconstruction of the aortoiliac region from computed tomography angiography.
- Quantification of vessel elongation (tortuosity index, absolute average curvature) and bifurcation parameters.
Main Results:
- Occlusion group showed higher tortuosity index (TI) and absolute average curvature (AAC) on the contralateral side.
- Aneurysm group exhibited higher AAC on the ipsilateral side and significantly higher TI and AAC in iliac arteries compared to other groups.
- Age influenced most elongation parameters; AAC was associated with obesity.
Conclusions:
- Common iliac artery occlusions are associated with relatively straight iliac arteries.
- Unilateral, isolated CIA aneurysms are more likely to occur in elongated aortoiliac systems.
- Vessel geometry plays a distinct role in the development of different CIA pathologies.
Purpose:
to investigate the effects of vessel geometry on steno-occlusive and dilatative common iliac artery (CIA) pathologies.
Methods:
this single-center, retrospective study included 100 participants, namely 60 participants with a unilateral, isolated CIA pathology who were divided into three pathology-based groups (a stenosis group, n = 20, an occlusion group, n = 20, and an aneurysm group, n = 20) and 40 participants without a CIA pathology (control group). All participants underwent abdominal and pelvic computed tomography angiography. The aortoiliac region of the participants was reconstructed into three-dimensional models. Elongation parameters (tortuosity index (TI) and absolute average curvature (AAC)) and bifurcation parameters (iliac take-off angle, iliac planarity angle, and bifurcation angle) were determined using an in-house-written piece of software. Demographic data, anthropometric data, cardiovascular risk factor data, and medical history data were obtained from participants' electronic health records. The following statistical methods were used: one-way ANOVA, chi-square test, t-tests, Wilcoxon test, Kruskal-Wallis test, and multivariate linear regression.
Results:
in the occlusion group, both TI and AAC values were significantly higher on the contralateral side than on the ipsilateral side (both p < 0.001), whereas in the aneurysm group the AAC values were significantly higher on the ipsilateral side than on the contralateral side (p = 0.001). The ipsilateral and contralateral TI and AAC values of the iliac arteries were significantly higher in the aneurysm group than in the other three groups (all p < 0.001). Age significantly affected all of the elongation parameters except for the TI of the infrarenal aorta (all p < 0.010 except the TI of the infrarenal aorta). In addition, the AAC values for the iliac arteries were significantly associated with obesity (ipsilateral iliac artery, p = 0.045; contralateral iliac artery, p = 0.047). Aortic bifurcation parameters did not differ significantly either within each group (ipsilateral versus contralateral side) or between the individual groups.
Conclusions:
occlusions tend to develop in relatively straight iliac arteries, whereas unilateral, isolated CIA aneurysms are more likely to occur in elongated aortoiliac systems.
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