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Ann Thorac Surg 1996;62:1935-1943
© 1996 The Society of Thoracic Surgeons

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Supplement on Bleeding and Transfusion

Reduction in Requirements for Allogeneic Blood Products: Nonpharmacologic Methods

Department of Anesthesia, Montreal Heart Institute, University of Montreal, Montreal, Quebec, Canada; Department of Anesthesia, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France; and Department of Anesthesia, Groupe Hospitalier Pitié-Salpêtrière, Université Paris VI, Paris, France

Abstract

Background. Various strategies have been proposed to decrease bleeding and allogeneic transfusion requirements during and after cardiac operations. This article attempts to document the usefulness, or lack thereof, of the nonpharmacologic methods available in clinical practice.

Methods. Blood conservation methods were reviewed in chronologic order, as they become available to patients during the perisurgical period. The literature in support of or against each strategy was reexamined critically.

Results. Avoidance of preoperative anemia and adherence to published guidelines for the practice of transfusion are of paramount importance. Intraoperatively, tolerance of low hemoglobin concentrations and use of autologous blood (predonated or harvested before bypass) will reduce allogeneic transfusions. The usefulness of plateletpheresis and retransfusion of shed mediastinal fluid remains controversial. Intraoperatively and postoperatively, maintenance of normothermia contributes to improved hemostasis.

Conclusions. Several approaches have been shown to be effective. An efficient combination of methods can reduce, and sometimes abolish, the need for allogeneic blood products after cardiac operations, inasmuch as all those involved in the care of cardiac surgical patients adhere thoughtfully to existing transfusion guidelines.

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