“…Despite recent advances in surgical techniques and perioperative management, the incidence of postoperative hyperbilirubinemia after open-heart surgery is estimated to be nearly 20% [1,2,3,4,5,6,7,8,9,10], which has been consistent since the first report in 1967 [1,2]. Previous studies have suggested a number of possible risk factors underlying the development of postoperative hyperbilirubinemia, including age, heart failure [10,11], cardiopulmonary bypass time [9,10], transfusion [6,9], hemolysis [6] and sepsis [1].…”