• Int J Artif Organs · Jan 1999

    Randomized Controlled Trial Comparative Study Clinical Trial

    Effects of unprocessed and processed cardiopulmonary bypass blood retransfused into patients after cardiac surgery.

    • B H Walpoth, N Eggensperger, S P Hauser, P Neidhart, G Kurt, P J Spaeth, and U Althaus.
    • Department of Cardiovascular Surgery, Anesthesiology, Central Hematology Laboratory, University Hospital, Insel, Berne, Switzerland. beat.walpoth@insel.ch
    • Int J Artif Organs. 1999 Jan 1;22(4):210-6.

    BackgroundThe aim of this prospective study was to compare the effect of autologous unprocessed to processed residual cardiopulmonary bypass blood (CPB) on patients' laboratory and clinical parameters and outcome.Methods20 patients undergoing elective coronary artery bypass surgery were randomized to receive either unprocessed CPB blood (control group) or processed CPB blood employing the Continuous AutoTransfusion System (CATS; Fresenius, Bad Homburg, Germany). We have shown that this method eliminated >93% of activated mediators. Serial laboratory parameters including complement activation, coagulation factors and the stimulation of IL-6 and IL-8 were compared with clinical side effects and patients' outcome.ResultsCompared to control patients, retransfusion of unprocessed CBP blood significantly increased heparin, free plasma hemoglobin and D-Dimers. Postoperatively, three patients in the control group and two patients in the CATS group required prolonged mechanical ventilation or developed infections associated respectively with elevated C3a (desArg) or IL-6 concentration.ConclusionsCATS-processing of CPB blood provided a high-quality red blood cell concentrate, resulting in a reduced load of retransfused activated mediators.

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