The Investigation of the Causes of Hepatic Dysfunction in the Postoperative Period During Open-heart Surgeries

In a single group of patients including 340 patients undergoing open-heart surgery during a period of nine months, the collected parameters include; alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphatase (ALP), total bilirubin (TBIL), and gamma-glutamyl transpeptidase (GGT) and albumin preoperatively and on postoperative days of 1, 3 and 7. All patients were divided into two groups as with or without hyperbilirubinemia, and this was defined by the occurrence of a plasma total bilirubin concentration of more than 34 µmol/L (2 mg/dL) in any measurement during the postoperative period. For each diagnostic test, a comparison within the group for different time points was statistically evaluated by analysis of variance tests.

Possible preoperative, intraoperative, and postoperative risk factors were investigated. The relations between hyperbilirubinemia and possible risk factors are sought by the use of the statistical analysis methods including logistic regression analysis.

All patients were investigated for a period of ten days postoperatively. During this period, intensive care unit (ICU) stay, in-hospital stay, and all adverse events were recorded.