Al-Habib Amro, Albadr Fahad, Ahmed Jehad, Aleissa Abdulrahman, Al Towim Abdullah
Division of Neurosurgery, Department of Surgery, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia. E-mail:
Neurosciences (Riyadh). 2018 Apr;23(2):104-110. doi: 10.17712/nsj.2018.2.20170448.
To quantify the anatomic relationship between the Cervical pedicle screw (CPS), vertebral artery (VA), and related anatomic structures in the Saudi population.
This retrospective single center study included 50 consecutive patients (35 males) with normal neck findings on computed tomography angiography performed for trauma or vascular evaluation between 2012 and 2014. Radiologic parameters were assessed and correlated with age, weight, height, and body mass index (BMI).
Mean age, weight, height, and BMI were 45.74+/-18.93 years, 79.72+/-21.80 kg, 164.74+/-11.53 cm, and 29.38+/-6.13 kg/m2, respectively. Mean cervical pedicle diameter (PD) increased from the cranial to caudal vertebrae (p=0.0001). Mean free zone (FZ) value, defined as the distance between the lateral CP border and medial VA border, was 1 mm (range 0.95-1.16 mm). The VA entry into the transverse foramina was at C6 level on both the right 92% and left side in most patients 94%. However, the right and left side level of VA entry differed in 14% of individuals.
The PD and FZ are smaller in Saudi Arabians than in western populations. Assessment of VA entry at each level should be performed on an individual basis as the level of VA entry can differ in the same patient. Anatomic variations between different geographic areas should be studied to provide better surgical guidance.
量化沙特人群中颈椎椎弓根螺钉（CPS）、椎动脉（VA）及相关解剖结构之间的解剖关系。
这项回顾性单中心研究纳入了2012年至2014年间因创伤或血管评估而行计算机断层血管造影且颈部检查结果正常的50例连续患者（35例男性）。评估放射学参数，并将其与年龄、体重、身高和体重指数（BMI）进行关联。
平均年龄、体重、身高和BMI分别为45.74±18.93岁、79.72±21.80千克、164.74±11.53厘米和29.38±6.13千克/平方米。颈椎椎弓根平均直径（PD）从颅侧椎体向尾侧椎体逐渐增大（p = 0.0001）。平均游离区（FZ）值，即椎弓根外侧缘与椎动脉内侧缘之间的距离，为1毫米（范围0.95 - 1.16毫米）。大多数患者（右侧92%，左侧94%）椎动脉进入横突孔的位置在C6水平。然而，14%的个体左右侧椎动脉进入水平不同。
沙特阿拉伯人的椎弓根直径和游离区比西方人群小。由于同一患者的椎动脉进入水平可能不同，因此应针对个体对每个水平的椎动脉进入情况进行评估。应研究不同地理区域之间的解剖变异，以提供更好的手术指导。
