Objective To discuss the effective surgical treatment,and to degrade the rate of the surgical complications and the mortality.Methods The clinical data including the medical record,preoperative preparation,operation,preoperative treatment and complications were retrospectively analyzed.Results The symptoms of all 20 cases(57.1%)were relieved and 11 cases(31.4%)were improved,3 cases(8.6%)were ineffective,1 case(2.9%)was aggravated.The effective rate was 88.5%.Conclusion Satisfying preoperative preparation,re...