UNASSIGNED: Prospective study of 522 ambulatory patients (256 males, 266 females, mean age 55±18 years; range, 20-89 years) who underwent computed tomography (CT) neck examinations. Using a manually operated segmentation program, spinal canal, and vertebral body cross-sectional area (CSA), anteroposterior (AP) sagittal diameter, and width were measured at each level from C3-C7. Patient height and weight were measured.
UNASSIGNED: Considerable variation in spinal canal size existed with, for example, a 164-168% variation exists for males and females between the largest and smallest spinal canal CSA at C5. All spinal canal measurements increased slightly with height (r=0.25-0.36, P<0.001), while vertebral body AP sagittal diameter increased with age (r=0.48-0.51, P<0.001). All spinal canal measurements were larger (<0.0001) in males. Although spinal canal CSA was larger in males (at C5, males 276.0±41.5 mm2; females 252.6±38.4 mm2), relative to vertebral body CSA, spinal canal CSA was larger in females. Arbitrary population thresholds indicating the smallest 25% spinal canal CSA and AP sagittal diameter as well as other parameters were defined.
UNASSIGNED: There is a large variation in developmental cervical spinal canal size within the Hong Kong population. A reference range of developmental spinal canal size was developed which will enable an objective assessment of an individual\'s cervical spinal canal size relative to the wider population.
■对522名门诊患者(256名男性,266名女性,平均年龄55±18岁;范围,20-89岁)接受计算机断层扫描(CT)颈部检查。使用手动操作的分割程序,椎管,和椎体横截面积(CSA),前后(AP)矢状径,和宽度在C3-C7的每个水平处测量。测量患者身高和体重。
■椎管大小存在相当大的变化,例如,男性和女性在C5最大和最小的椎管CSA之间存在164-168%的差异。所有椎管测量值随身高的增加而略有增加(r=0.25-0.36,P<0.001),椎体AP矢状径随年龄增加而增大(r=0.48~0.51,P<0.001)。男性的所有椎管测量值均较大(<0.0001)。尽管男性的椎管CSA较大(C5,男性276.0±41.5mm2;女性252.6±38.4mm2),相对于椎体CSA,女性椎管CSA较大。定义了任意人群阈值,表明最小的25%椎管CSA和AP矢状直径以及其他参数。
■在香港人口中,发育性颈椎管的大小差异很大。开发了发育性椎管大小的参考范围,这将能够相对于更广泛的人群客观评估个体的颈椎管大小。