ArticleSurgical and radiologic anatomy : SRA2025
Iliopubic rami morphology and its vascular relationships in percutaneous retrograde fixation.
Article in Surgical and radiologic anatomy : SRA, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposePelvic ring fractures involving the iliopubic rami can cause functional impairment. Percutaneous retrograde fixation is a less invasive procedure when compared to traditional open approaches, however precise anatomical knowledge is crucial for safe screw placement. This study aims to describe the morphology of the iliopubic rami, define a safety corridor for percutaneous screw fixation, specially focusing on the relationships between the iliopubic rami and neurovascular structures.
methodsA retrospective cross-sectional study was conducted on 29 patients using high-resolution computed tomography scans. Measurements included rami shape, narrowest diameter, and distances between the iliopubic rami and neurovascular structures. Statistical comparisons were performed using the Wilcoxon, Mann-Whitney, and Kruskal-Wallis tests.
resultsTriangular and trapezoidal rami shapes were most common being the median narrowest diameter larger in males (8.67 mm) than females (6.83 mm) (p = 0.011). The obturator neurovascular bundle was approximately 3 mm from the iliopubic rami, while the external iliac vein and artery were about 5 mm and 11 mm away, respectively. Women also had a greater external iliac vein proximity to the iliopubic rami on the left, compared to men (p = 0.032).
conclusionTherefore, preoperative imaging is essential to reduce neurovascular risks and given anatomical variations, screw selection should be sex-specific, with 6.5 mm screws for males and 4.5 mm for females. The polygonal rami shapes allow the use of straight plates. The obturator neurovascular bundle is highly vulnerable during screw placement as so it is the external iliac vein compared to the homonym artery, especially in women.
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