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目的通过多排螺旋CT血管成像(MSCTA)研究颅内动脉瘤几何形态与其破裂风险的关系。方法 85例颅内动脉瘤患者,按其是否破裂分为破裂组(45例)与未破裂组(40例);MSCTA行三维重建,测量动脉瘤多种几何参数,分析动脉瘤长径、纵横比(AR)即瘤体长径/瘤颈宽度、入射角(动脉瘤瘤高度延长线与近端载瘤动脉夹角)。分析各指标与颅内动脉瘤破裂的相关性。结果破裂组瘤体长径、AR值和入射角分别为(6.8±2.3)mm、(1.8±0.7)和(123.6±24.6)°,高于未破裂组(4.1±1.1)mm、(1.3±0.5)和(109.5±19.5)°,差异有统计学意义(P<0.05)。结论动脉瘤长径、AR值及入射角是动脉瘤破裂的危险因素。
Objective To study the relationship between the geometry of intracranial aneurysms and the risk of rupture by multislice spiral CT angiography (MSCTA). Methods Eighty-five patients with intracranial aneurysm were divided into rupture group (n = 45) and non-ruptured group (n = 40) according to whether they ruptured or not. Three-dimensional reconstruction of MSCTA was performed to measure the geometric parameters of aneurysm. The ratio (AR), ie, the major axis of the tumor / width of the tumor neck, and the angle of incidence (the angle between the extension of the aneurysm height and the parent artery carrying the artery). Analysis of the correlation between each index and intracranial aneurysm rupture. Results The long diameter, AR value and incident angle of the rupture group were (6.8 ± 2.3) mm, (1.8 ± 0.7) and (123.6 ± 24.6) °, respectively, higher than those of the unruptured group (4.1 ± 1.1) mm and (1.3 ± 0.5) and (109.5 ± 19.5) °, the difference was statistically significant (P <0.05). Conclusion Aortic aneurysm length, AR value and incidence angle are the risk factors of aneurysm rupture.