Abstract:Abstract: Objective?To investigate the effect of DSA guided wire extraction method in difficult nasobiliary duct oronasal conversion.?Methods?From August 2018 to March 2019, 46 patients performed with difficult nasobiliary duct oronasal conversion were randomly studied. The patients were performed with the method of DSA guided wire extraction. The total success rate, one-time success rate, the average taking number, the average operation time, the number of wire placement, the degree of response to stimuli and the incidence of complications were researched.?Results?The total success rate was 100.00% (46/46) and one-time success rate was 100.00% (46/46). The average number of wire placement was (1.33?±?0.60), the average operation time was (37.72?±?14.04)?s, the stimulation degree score was (1.43?±?0.69) including 31 cases of mild stimulation, 10 cases of moderate stimulation and 5 cases of severe stimulation. The rate of adverse reaction was 15.22% (7/4).?Conclusion?The DSA guided wire extraction is a safe and feasible method for the patients with difficult nasobiliary duct oronasal conversion.