Fig. 3

General procedure for dilated CBD. a Explore Calot’s triangle and make a longitudinal incision on the anterior wall of the CBD; b Bluntly dilate the incision on the bile duct; c Explore the CBD with a choledochoscope and remove all stones; d Place the stent under the guidance of the choledochoscope; e Use 4-0 PDS sutures for interrupted suturing and temporarily fix the stent; f After complete suturing, check the CBD for the absence of stenosis and bile leakage.