- There must be postoperative evidence of adequate hepatic function, i.e., total bilirubin must be ≤ ULN for the lab unless the patient has a chronic grade 1 bilirubin elevation (>ULN to ≤1.5 x ULN) due to Gilbert's disease or similar syndrome; and alkaline phosphatase must be <2.5 times the ULN for the lab; and the serum glutamic-oxaloacetic transaminase (SGOT [AST]) must be <1.5 times the ULN for the lab.