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OBJECT: The purpose of this study was to determine the incidence and outcomes of intraprocedural rupture (IPR) during endovascular coil embolization of intracranial aneurysm at a single center and to explore the technical reasons and put forward corresponding preventive measures for the feared event to serve as references for other endovascular specialists.METHODS: The aneurysm database in our series was retrospectively reviewed.From Jan 2011to March 2013,335aneurysms were consecutively treated with coils in 301 patients and IPR occurred in 15 patients.RESULTS: Of the 15 patients,7were men and eight were women with a median age of 56 years.An emergency "rescue clipping" of the lesion was carried out in two patients,endovascular treatment was terminated in one case and aneurysm coiling was rapidly completed in the remaining twelve cases.Two patients died.The follow-up duration was 3-30 months (median 14 months) and the mean Glasgow Outcome Scale score at the last follow-up examination was 12.CONCLUSIONS: The rate of IPR during endovascular coiling of intracranial aneurysms is quite low and the clinical outcome from this complication need not be catastrophic if managed appropriately.Improved operation skill and practical experience exchange among neuroradiologists are essential to lower the incidence or better patient prognoses.