Blood samples for analysis of S100 BP were collected before anesthesia ( T1 ) , before heparinization ( T2 ) , 15 minutes into CPB ( T3 ) , following protamine administration ( T4 ) , postoperatively ( T5 ) , 24 hours after the operation ( T6 ) , postoperative day 3 ( T7 ) , and postoperative day 6 ( T8 ) .
