GPT and tuberculosis: Meanwhile, at the same time, our study also found that there was no significant change in postoperative ALT and AST among different groups, but the levels of TB and DB in the combination group were significantly lower than those in other groups; we considered that this was due to the fact that the diameter of the anastomotic stoma was relatively wider in the combination group, which was more conducive to bile excretion after biliary obstruction, so the decrease in bilirubin was more significant.