On the second day after planned cholecystectomy the patient complains about pains in epigastric with belt like radiation, higher amylase in urine. The most probable cause of pancreatitis can be:
A. Reaction on narcosis
B. Hypovolemia
C. "Forgave" concrement in ductus choledochus
D. In postoperative period omnopone was used as a painkiller
Answer: C. "Forgave" concrement in ductus choledochus