Twenty-two of the 44 patients were given intraoperative intravenous infusion of 20 % human albumin with 0.9 % normal saline ( albumin group ) , and the remaining 22 patients received intraoperative intravenous infusion of 0.9 % normal saline alone ( saline group ) , as part of the intraoperative fluid hydration to keep central venous pressure between 10 and 15 mm of Hg .