Abstract
Background: Direct autologous retransfusion of shed thoracic blood is carried out to reduce homologous
transfusion after cardiac surgery, but it contains high concentrations of inflammatory
mediators. The purpose of the study was to investigate whether retransfusion of shed
thoracic blood induces plasma interleukin-6 (IL-6) expression and influences haemodynamics.
Methods: Following uncomplicated coronary artery bypass graft surgery, forty-four patients
were randomised in case postoperative blood loss via thoracic drains exceeded 350
ml. The course of plasma IL-6 levels and haemodynamics including cardiac output, extravascular
lung water and intrathoracic blood volume were investigated prior to (T0), 30 minutes
(T1), 1 (T2), 3 (T3) and 12 hours (T4) after retransfusion of 350 ml shed blood in
comparison to 350 ml saline. Results: Plasma IL-6 levels at T1 (1892 ± 202 vs. 485 ± 30 pg/ml) and T2 (1059 ± 119 vs. 413
± 30 pg/ml) were significantly higher in the verum group (n = 20) compared to controls
(n = 24) (p < 0.01). Severe haemodynamic side effects were not detected. Conclusion: This study found significantly elevated plasma IL-6 levels following direct autologous
retransfusion of shed thoracic blood but failed to show severe adverse effects affecting
haemodynamic stability.
Key words
autologous blood transfusion - haemodynamic phenomena - interleukin‐6
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MD Heiko Lier
Department of Anaesthesiology and Intensive Care Medicine University of Cologne
Kerpener Straße 62
50937 Köln
Germany
Phone: + 49 22 14 78 48 07
Fax: + 49 22 14 78 60 93
Email: heiko.lier@uk-koeln.de