Study Objective: To investigate the quality of cell salvaged (CS) blood in patients undergoing hemihepatectomy (study group) and compare it with CS-blood from aortic surgery (control group).
Design: Observational study.
Setting: Operating room in a university hospital.
Measurements: 6 patients undergoing hemihepatectomy or aortobifemoral bypass with intraoperative blood loss of more than 800 mL. Samples were drawn from the central venous catheter, from the reservoir of a CS recovery system, and from the processed blood in each patient to determine interleukin (IL)-6, IL-8, IL-10, tumor necrosis factor (TNF), complement C3a, and the terminal complement complex C5b-9. Microbiological analysis included colony count after cultivation in aerobic and anaerobic medium as well as enrichment culture for 6 days.
Main Results: In the hemihepatectomy group, levels of IL-6, C3a, and C5b-9 were significantly higher in the reservoir than in samples obtained from the central venous catheter. After the washing procedure, levels of IL-6, C3a, and C5b-9 were lower in the liver resection group than in each patient's own plasma levels. In all patients undergoing aortobifemoral bypass and in 5 patients undergoing hemihepatectomy, blood samples were sterile or showed growth of commensal skin microflora in low numbers (coagulase-negative staphylococci or propionibacteria). In one patient in the liver resection group, we could not exclude contamination with intestinal flora.
Conclusion: Cell salvaged blood in liver resection seems to be safe for retransfusion with respect to cytokine release and complement activation, but requires further investigation in regard to bacterial contamination.
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