• BMC anesthesiology · Nov 2019

    Randomized Controlled Trial Comparative Study

    Thrombelastometry guided blood-component therapy after cardiac surgery: a randomized study.

    • Martin Haensig, Joerg Kempfert, Pia-Maria Kempfert, Evaldas Girdauskas, Michael Andrew Borger, and Sven Lehmann.
    • Department of Vascular Surgery, Cardiovascular Center, University of Leipzig, Liebigstr 20, 04103, Leipzig, Germany. mhaensig@gmail.com.
    • BMC Anesthesiol. 2019 Nov 6; 19 (1): 201.

    BackgroundSignificant bleeding is a well known complication after cardiac surgical procedures and is associated with worse outcome. Thrombelastometry (ROTEM®) allows point-of-care testing of the coagulation status but only limited data is available yet. The aim was to evaluate the ROTEM®-guided blood component therapy in a randomized trial.MethodsIn case of significant postoperative bleeding (> 200 ml/h) following elective isolated or combined cardiac surgical procedures (including 14% re-do procedures and 4% requiring circulatory arrest) patients were randomized to either a 4-chamber ROTEM®-guided blood-component transfusion protocol or received treatment guided by an algorithm based on standard coagulation testing (control). One hundred four patients (mean age: 67.2 ± 10.4 years, mean log. EuroSCORE 7.0 ± 8.8%) met the inclusion criteria. Mean CPB-time was 112.1 ± 55.1 min., mean cross-clamp time 72.5 ± 39.9 min.ResultsBaseline demographics were comparable in both groups. Overall there was no significant difference in transfusion requirements regarding red blood cells, platelets, plasma, fibrinogen or pooled factors and the re-thoracotomy rate was comparable (ROTEM®: 29% vs. control: 25%). However, there was a trend towards less 24-h drainage loss visible in the ROTEM®-group (ROTEM®: 1599.1 ± 834.3 ml vs. control: 1867.4 ± 827.4 ml; p = 0.066). In the subgroup of patients with long CPB-times (> 115 min.; n = 55) known to exhibit an increased risk for diffuse coagulopathy ROTEM®-guided treatment resulted in a significantly lower 24-h drainage loss (ROTEM®: 1538.2 ± 806.4 ml vs. control: 2056.8 ± 974.5 ml; p = 0.032) and reduced 5-year mortality (ROTEM®: 0% vs. control: 15%; p = 0.03).ConclusionIn case of postoperative bleeding following cardiac surgical procedures a treatment algorithm based on "point-of-care" 4-chamber ROTEM® seems to be at least as effective as standard therapy. In patients with long CPB-times ROTEM®-guided treatment may result in less bleeding, a marked reduction in costs and long-term mortality.Trial RegistrationGerman Clinical Trials Register, TRN: DRKS00017367 , date of registration: 05.06.2019, 'retrospectively registered'.

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