目的　探讨颅内动脉瘤囊内栓塞治疗中并发症的发生原因及预防和处理的方法。　方法　用可控性弹簧圈栓塞治疗的动脉瘤 12 0例 (12 5个 ) ,其中 2 2例 (2 3个动脉瘤 )发生并发症 2 5例次(包括动脉瘤破裂、载瘤动脉血栓形成或其它原因所致的闭塞以及弹簧圈脱出动脉瘤 ) ,对其发生的原因及预防和治疗方法进行了回顾性分析。　结果　 2 2例出现并发症的动脉瘤患者中 ,动脉瘤破裂出血 9例次 ,过度栓塞 7例次 ,弹簧圈脱出 7例次 ,血栓形成 2例次。因并发症而死亡 4例 (3 33 % ) ,永久性神经功能障碍 2例 (1 6 7% ) ;一过性神经功能障碍 4例 (3 33 % )。栓塞技术、术中判断和处理的正确与否、动脉瘤和载瘤动脉的特点以及栓塞材料与并发症的发生和结局相关。　结论　栓塞技术的提高 ,动脉瘤和载瘤动脉解剖的深入理解 ,术中发生情况的正确处理、栓塞材料的改进 ,有助于降低并发症的发生率改善其预后。 Objective To investigate the causes of complications in the treatment of intracranial aneurysms during intracapsular embolization and their prevention and management. Methods Aneurysms treated with controllable coil embolization were performed in 120 cases (12 5), of which 22 cases (23 aneurysms) had complications in 25 cases (including rupture of aneurysm and thrombosis of parent artery). Or occlusion caused by other reasons and the aneurysm out of the coil), its causes and prevention and treatment methods were retrospectively analyzed. Results Of the 22 patients with complications of aneurysms, 9 cases of ruptured aneurysms, 7 cases of excessive embolization, 7 cases of prolapse of the coil, and 2 cases of thrombosis. Four patients (33%) died due to complications, permanent neurological dysfunction occurred in 2 (16.77%), and transient neurological dysfunction occurred in 4 (33%) cases. Embolization techniques, correctness of intraoperative judgment and treatment, features of aneurysms and parent tumor arteries, and embolic materials are associated with the occurrence and outcome of complications. Conclusion The improvement of embolization techniques, the deep understanding of aneurysm and parent artery anatomy, the correct treatment of intraoperative conditions, and the improvement of embolization materials help reduce the incidence of complications and improve the prognosis.