 Klebanoff began a new era of autotransfusion by developing the first commercially available autotransfusion unit in 1968.His system, the Bentley Autotransfusion System aspirated, collected, filtered and reinfused autologous whole blood shed from the operative field.The problems with the Bentley system included the requirement of systemic anticoagulation of the patient, introduction of air embolism, and renal failure resulting from unfiltered particulate in the reinfused blood.