IRCT2016073029123N1 IRCT 2016-10-11 Iran University of Medical Sciences Assessment effect of replacement liquid (crystalloid and colloid ) used for deairing circuits of cardiopulmonary bypass by patient own blood in patient undergoing coronary artery bypass grafting on clinical outcome Assessment Effect of retrograde autologous priming on clinical outcome of heart lung bypassing on patients undergoing coronary artery bypass grafting 2016-10-22 anticipated 80 Complete https://irct.ir/trial/23487 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Other, Purpose: Treatment. N/A Coronary artery disease. Intervention 1: In the intervention group before the start of cardiopulmonary bypass and After the arterial cannulation by the surgeon we allow the patient blood reversely enter in arterial line by aorta pressure And at the same time we opened The bags Direction that had been placed on one of the output circuti and allowed equal the blood that inter from arterial line into circuit Priming fluid out.After leaving the arterial fluid circuit we have closed the arterial line and Action to spin pumps are connected to the oxygenator with slow motion And because the only output in the circuit is the collecting bags that connected to the circuit, liquid in the reservoir as much as possible inter in the collecting bag.In the final stage, when the patient's venous blood opens to the reservoir of the cardiopulmonary bypass, we attempt to extract this liquid from reservoir.Through the method that said in the intervention group In coordination with the Department of Anesthesiology to prevent hypotension,we extract 300-600 Milliliters of liquid prime and replace it with the patient's blood. Intervention 2: In the control group cardiopulmonary bypass circuits primed with conventional method (approximately1500 ml of crystalloid and colloid).And this fluid volume remains in the cardiopulmonary bypass circuit and inter to the patient body with the starting of the bypass.