Kinetics of liver function tests after a hepatectomy for colorectal liver metastases predict post-operative liver failure as defined by the International Study Group for Liver Surgery.

BACKGROUND Post-hepatectomy liver failure (PHLF) has been defined by the International Study Group for Liver Surgery (ISGLS). The purpose of the present study was to examine the kinetics of conventional liver function tests (LFT) after a major liver resection and is the first to examine their utility in predicting PHLF in groups defined by the ISGLS. METHODS Consecutive patients undergoing a major liver resection for colorectal liver metastases were stratified into ISGLS groups and their LFT up to 1 year after surgery compared. Receiving-operating characteristic (ROC) analysis of LFT identified optimal thresholds in predicting category C liver failure. RESULTS In total, 32, 22 and 19 patients belonged to ISGLS groups A, B and C, respectively. The median international normalized ratio (INR) and bilirubin values on post-operative days 1, 3, 5 and 7 were significantly different among the groups (all P-values <0.05). ROC analysis of day 1 INR (AUC 0.813) and day 5 bilirubin (AUC 0.798) revealed thresholds of 1.35 and 52 μmol/l to have sensitivities of 85% and 81% and specificities of 63% and 73%, respectively, to predict group C liver failure. DISCUSSION Post-operative LFT after a major liver resection differs significantly among the three ISGLS groups. Thresholds of bilirubin and INR can be used to identify patients who are at a maximum risk of complications.

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