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目的 Willis环上大脑前动脉水平段 (A1)解剖结构及胎儿型大脑后动脉与前、后交通动脉瘤形成的关系。方法 对 3 2例前交通动脉瘤、5 4例后交通动脉瘤进行了临床和数字减影造影 (DSA)分析。结果 在 3 2例前交通动脉瘤患者中 ,2 5例双侧大脑前动脉由一侧A1供血或主要供血 ,动脉瘤均在供血侧。在 5 4例后交通动脉瘤患者中 ,共有 3 0侧出现胎儿型大脑后动脉 ,发现后交通动脉瘤 2 3例。结论 在患有高血压病 (尤其是合并动脉粥样硬化者 )的动脉瘤病人中 ,双侧大脑前动脉由一侧A1供血或主要供血有供血侧及胎儿型大脑后动脉更易发生动脉瘤。
Objective To investigate the anatomic structure of the segment of the anterior cerebral artery (A1) in the Willis ring and the relationship between the fetal posterior cerebral artery and the anterior and posterior communicating aneurysms. Methods Clinical and digital subtraction radiography (DSA) analysis was performed on 32 cases of anterior communicating artery aneurysms and 54 cases of posterior communicating artery aneurysms. Results Among the 32 cases of anterior communicating aneurysms, 25 cases of bilateral anterior cerebral arteries were supplied with blood or blood from one side, and the aneurysms were all on the side of blood supply. Among 54 cases of posterior communicating artery aneurysm, there were 30 fetal posterior cerebral arteries in 30 sides and 23 cases of posterior communicating aneurysms were found. Conclusions In aneurysm patients with hypertension, especially those with atherosclerosis, aneurysms are more likely to develop in the bilateral anterior cerebral arteries from either the side A1 or from the main donor blood supply and the fetal posterior cerebral artery.