Arterial lactate level before incision higher than 1.41 mmol / L related to morbidity (OR=3.46, CI 95% 1.32 - 9.12, p=0.012), and poorly predicted morbidity (AUC=0.66, CI 95% 0.54 - 0.79, Se 65.5%, Sp 64.6%, PPV 52.8%, NPV 75.6%).