(Circulation. 1995;92:2236-2244.)
© 1995 American Heart Association, Inc.
Articles |
A Multicenter, Double-Blind, Placebo-Controlled Trial of Aprotinin for Reducing Blood Loss and the Requirement for Donor-Blood Transfusion in Patients Undergoing Repeat Coronary Artery Bypass Grafting
From the Department of Anesthesiology, Emory University Hospital, Atlanta, Ga (J.H.L.); the Department of Thoracic and Cardiovascular Surgery, Loyola University Medical Center, Maywood, Ill (R.P.); the Section of Cardiovascular Surgery, Mayo Clinic, Rochester, Minn (H.V.S.); the Department of Anesthesiology, Hahnemann University, Philadelphia, Pa (J.C.H.); Virginia Heart Surgery Associates, Fairfax (R.A.); the Department of Anesthesiology, University of Washington Medical Center, Seattle (B.S.); the Division of Cardiothoracic Surgery, Cornell Medical Center, New York, NY (T.K.R.); the Department of Anesthesiology, University of Michigan Medical Center, Ann Arbor (J.M.); the Division of Cardiothoracic Surgery, Duke University Medical Center, Durham, NC (P.S.); the Department of Surgery, Allegheny General Hospital, Pittsburgh, Pa. (R.E.C.); and Miles Inc Pharmaceutical Division, West Haven, Conn (A.N., S.L.B., R.K.).
Background Aprotinin is a serine protease inhibitor that reduces blood loss and transfusion requirements when administered prophylactically to cardiac surgical patients. To examine the safety and dose-related efficacy of aprotinin, a prospective, multicenter, placebo-controlled trial was conducted in patients undergoing repeat coronary artery bypass graft (CABG) surgery.
Methods and Results Two hundred eighty-seven patients were randomly assigned to receive either high-dose aprotinin, low-dose aprotinin, pump-prime-only aprotinin, or placebo. Drug efficacy was determined by the reduction in donor-blood transfusion up to postoperative day 12 and in postoperative thoracic-drainage volume. The percentage of patients requiring donor–red-blood-cell (RBC) transfusions in the high- and low-dose aprotinin groups was reduced compared with the pump-prime-only and placebo groups (high-dose aprotinin, 54%; low-dose aprotinin, 46%; pump-prime only, 72%; and placebo, 75%; overall P=.001). The number of units of donor RBCs transfused was significantly lower in the aprotinin-treated patients compared with placebo (high-dose aprotinin, 1.6±0.2 U; low-dose aprotinin, 1.6±0.3 U; pump-prime-only, 2.5±0.3 U; and placebo, 3.4±0.5 U; P=.0001). There was also a significant difference in total blood-product exposures among treatment groups (high-dose aprotinin, 2.2±0.4 U; low-dose aprotinin, 3.4±0.9 U; pump-prime-only, 5.1±0.9 U; placebo, 10.3±1.4 U). There were no differences among treatment groups for the incidence of perioperative myocardial infarction (MI).
Conclusions This study demonstrates that high- and low-dose aprotinin significantly reduces the requirement for donor-blood transfusion in repeat CABG patients without increasing the risk for perioperative MI.
Key Words: cardiopulmonary bypass • aprotinin • bleeding • fibrinolysis • surgery
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