Objective
Depending on the different location and different venous drainage pattern of DAVFs,patients may experience symptoms variable, ranging from mild symptom to fatalhemorrhage, and often need effective treatment. The purpose of the treatment is permanentocclusion of the fistulas. We use Onyx as the main endovascular treatment material to curedifferent kind of DAVFs, to investigate the clinical symptoms, the strategies of treatment,the technique and the efficacy depending on location and drainage pa...