Methods A kind of allotype T tube was designed,and its two upper arms cound be placed in left and right hepatic duct simultaneously and its lower arm in choledochus.

• 方法自行设计一种异型T管,两上臂可以同时放置在左、右肝管内,下臂置于胆总管内。术后若发现残余结石,可直接以胆道镜经T管取石。选取临床病例59例,应用本方法行临床试验。