Department of Interventional Neuroradiology, West Virginia University Hospital, Morgantown, West Virginia, USA.
J Neurointerv Surg. 2013 Jul;5(4):371-5. doi: 10.1136/neurintsurg-2012-010314. Epub 2012 Apr 4.
A study was undertaken to determine the typical length, diameter and taper of vessels in the anterior cerebral circulation.
The sample size was calculated at 100 patients based on similar measurements in the literature and divided into cohorts based on gender and side. These patients were consecutively collected from a population that had undergone CT angiography and did not have any vascular abnormality. The arterial diameter was measured at the proximal cavernous internal carotid artery (ICA), the ICA terminus, the middle cerebral artery (MCA) origin and an M2 origin. The length between these endpoints was calculated along the center line. The vessel taper was calculated for the ICA as the change in caliber per unit length.
The mean length of the ICA from the proximal cavernous segment to the ICA terminus was 33.1 ± 6.1 mm. The mean diameter at the cavernous ICA and the ICA terminus was 5 ± 0.6 mm and 3.6 ± 0.4 mm, respectively. The mean ICA taper was 0.04 ± 0.02 mm/1 mm. For the MCA, the diameter at the MCA and M2 origins measured 3.1 ± 0.4 mm and 2.4 ± 0.4 mm, respectively. The mean MCA length was 22.5 ± 8.1 mm. There was no significant difference based on gender or between right and left sides. Patients aged >60 years had longer ICAs (p=0.02), larger cavernous ICA (p=0.003), ICA terminus (p<0.0001) and MCA origin (p=0.01) diameters than those aged 40-60 years. The ICA vessel taper did not change with age.
ICA and MCA vessel size did not change based on gender or side. Older patients had more redundant vessels based on diameter and length. The ICA has a gentle taper from its proximal cavernous segment to the ICA terminus. This information can be important in planning interventions or designing endovascular devices.
本研究旨在确定大脑前循环血管的典型长度、直径和锥度。
根据文献中的类似测量值，计算出样本量为 100 例患者，并根据性别和侧别分为队列。这些患者是从接受 CT 血管造影且无血管异常的人群中连续收集的。在近端海绵状颈内动脉（ICA）、ICA 末端、大脑中动脉（MCA）起始处和 M2 起始处测量动脉直径。沿中心线计算这些端点之间的长度。ICA 的血管锥度是通过单位长度的管腔变化来计算的。
ICA 从近端海绵状段到 ICA 末端的平均长度为 33.1±6.1mm。ICA 在海绵状ICA 和 ICA 末端的平均直径分别为 5±0.6mm 和 3.6±0.4mm。ICA 的平均锥度为 0.04±0.02mm/1mm。MCA 直径在 MCA 和 M2 起始处分别为 3.1±0.4mm 和 2.4±0.4mm。MCA 的平均长度为 22.5±8.1mm。性别或左右侧之间无显著差异。年龄>60 岁的患者 ICA 较长（p=0.02），ICA 海绵状段（p=0.003）、ICA 末端（p<0.0001）和 MCA 起始处（p=0.01）直径较大。ICA 血管锥度随年龄变化不大。
ICA 和 MCA 血管大小不受性别或侧别影响。年龄较大的患者根据直径和长度，血管冗余更多。ICA 从近端海绵状段到 ICA 末端逐渐变细。这些信息对于规划介入治疗或设计血管内装置非常重要。
