Retrograde autologous priming in cardiopulmonary bypass in adult patients: effects on blood transfusion and hemodilution.

Introduction: Retrograde autologous priming (RAP) is a cardiopulmonary bypass (CPB) method, at low cost. Previous studies have shown that this method reduces hemodilution and blood transfusions needs through increased intra-operative hematocrit.

Objective: To evaluate RAP method, in relation to standard CPB (crystalloid priming), in adult patients.