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Influence of early re-infusion of autologous shed mediastinal blood on clinical outcome after cardiac surgery

Kaunas University of Medicine, Institute for Biomedical Research, Kaunas, Lithuania, sirdiskr{at}kmu.lt

Audrone Veikutiene

Kaunas University of Medicine Hospital, Department of Cardiothoracic and Vascular Surgery, Kaunas, Lithuania

Rimantas Benetis

Kaunas University of Medicine, Institute of Cardiology, Kaunas, Lithuania

Pranas Grybauskas

Kaunas University of Medicine, Institute of Cardiology, Kaunas, Lithuania

Judita Andrejaitiene

Kaunas University of Medicine, Institute for Biomedical Research, Kaunas, Lithuania

Vincentas Veikutis

Kaunas University of Medicine, Institute for Biomedical Research, Kaunas, Lithuania

Jonas Surkus

Kaunas University of Medicine Hospital, Department of Nephrology, Kaunas, Lithuania

Various strategies have been proposed to decrease allogeneic blood transfusion requirements after cardiac surgery. The aim of the study was to evaluate the efficacy of collected and re-infused autologous shed mediastinal blood on a patient's postoperative course.

Ninety patients who underwent heart surgery with cardiopulmonary bypass (CPB) were studied. The patients were divided into two groups: Group 1 (n = 41) received the centrifuged autologous shed mediastinal blood collected from the cardiotomy reservoir 4 hours after surgery; in Group 2 (n = 49) all shed mediastinal blood was discarded (control group). Haemoglobin (Hb), haematocrit (Hct), C-reactive protein values, and leucocyte count were compared before surgery, at 4 h and 20 h after surgery, and on the fifth postoperative day. We have measured serum procalcitonin (PCT) concentration at 4 h and 20 h after CPB. We assessed drained blood loss within 20 postoperative hours.

Leucocyte count, Hb, Hct values, C-reactive protein, and procalcitonin concentration did not differ between the groups before and at 4 h after surgery. Hb, Hct level, and leucocyte count were similar at 20 hours and on the fifth day after surgery. At 20 hours after surgery, an increase of serum PCT concentration (>0.5—2 ng/mL) was more frequent in Group 2 (58.3% vs. 33.3%; p = 0.03). On the fifth postoperative day, C-reactive protein concentration was lower in Group 1 (71.74 ± 15.23; p < 0.01) compared to Group 2 (93.53 ± 20.3). Postoperative blood loss did not differ between the groups. Requirement for allogeneic blood transfusion was significantly lower in Group 1 (14.6% vs. 38.8%; p < 0.02). Patients in Group 1 developed less infective complications compared with Group 2 (2.4% and 16.3%, respectively; p < 0.05). The length of postoperative in-hospital stay was shorter in Group 1 compared with Group 2 (9.32 ± 2.55 and 16.45 ± 6.5, respectively; p < 0.05).

We conclude that postoperative re-infusion of autologous red blood cells processed from shed mediastinal blood did not increase bleeding tendency and systemic inflammatory response and was effective in reducing the requirement for allogeneic transfusion, the rate of infective complications and the length of postoperative in-hospital stay. Perfusion (2007) 22, 345—352.

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