British Journal of Anaesthesia, Vol 78, Issue 6 684-689, Copyright © 1997 by The Board of Management and Trustees of the British Journal of Anaesthesia
G. A. Egli, A. Zollinger, B. Seifert, D. Popovic, T. Pasch and D. R. Spahn
We have compared the effects of progressive (30% and 60%) in vitro
haemodilution with hydroxyethyl starch (HES), gelatin (GEL) and albumin
(ALB) with haemodilution using 0.9% saline in 96 patients by
thrombelastography. Haemodilution with HES, GEL and ALB significantly (P
< 0.05) compromised coagulation time (k), angle alpha and maximal
amplitude (MA), with HES having the most negative effect at 30% and 60%
haemodilution (P < 0.05). Haemodilution with saline significantly
affected all variables of blood coagulation and clot lysis measured by
thrombelastography, resulting in an increased coagulability at 30%
haemodilution. To specifically assess the intrinsic effect of plasma
expander molecules on blood coagulation and clot lysis, we analysed the
difference between saline diluted blood (same degree of haemodilution) and
plasma expander diluted blood. Prolongation of reaction time (r) was found
for HES at 30% and 60% haemodilution and for ALB at 60% haemodilution and
an increase in clot lysis by HES, GEL and ALB became evident. We conclude
that HES, GEL and ALB compromised blood coagulation, while the maximum
effect was found with HES.
CLINICAL INVESTIGATIONS
Effect of progressive haemodilution with hydroxyethyl starch, gelatin and albumin on blood coagulation
Institute of Anaesthesiology, University of Zurich, CH-8091 Zurich, Switzerland; University Hospital and Department of Biostatistics, University of Zurich, CH-8091 Zurich, Switzerland
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