Evidence-based review of the role of aprotinin in blood conservation during orthopaedic surgery.

Aprotinin is a serine protease inhibitor with antifibrinolytic properties that has been approved as a blood-conserving drug in cardiac surgery by the United States Food and Drug Administration. On the basis of the current evidence from Level-I trials, we make a grade-A recommendation for use of the high-dose aprotinin regimen in hip and spine surgery. Because of conflicting data, the low-dose aprotinin therapy as well as the use of aprotinin in patients with cancer cannot be recommended (grade-I recommendation). High-quality randomized trials are necessary to determine the optimal (and minimal) therapeutic dose of aprotinin and the optimal time of aprotinin administration during surgery.