Abstract This study characterized the intraosseous arterial architecture of the trapezoid using micro-computed tomography (micro-CT) imaging and three-dimensional (3D) reconstruction techniques. Six normal cadaveric upper limbs were perfused with lead oxide-turpentine agent solution. Micro-CT angiography was then performed to obtain enhanced scans of the trapezoid, followed by 3D reconstruction to characterize its intraosseous artery distribution. Statistical comparisons were conducted regarding the number, diameter, and location of the enhanced arteries and nutrient foramina, as well as the blood supply to the different parts of the trapezoid. Two distinct vascular patterns were observed: the majority of specimens exhibited a Binary type (independent blood supply of dorsal and palmar regions with few anastomoses, type B), while the remainder showed an Anastomosis type (abundant interconnecting branches between dorsal and palmar intraosseous arteries, type A). The dorsal blood supply occupies the dominant position. The dorsal blood supply area is significantly larger than the palmar side (p < 0.05). The diameter and length of the dorsal main trunk arteries are significantly greater than those of the palmar main trunk arteries (p < 0.05). The diameters of the dorsal nutrient foramina and enhanced arteries are also significantly larger than those of the palmar side (p < 0.05). This study reveals the characteristics of the intraosseous arteries distribution in the trapezoid, providing guidance for minimizing intraosseous vascular disruption during surgical interventions.
Yu et al. (Mon,) studied this question.