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Article type: Research Article
Authors: Aronson, H.B.; * | Eimerl, D. | Beilin, B.
Affiliations: Department of Anaesthesiology, Hadassah University Hospital, Mount Scopus, Jerusalem, Israel
Correspondence: [*] Correspondence to Prof. H.B. Aronson, Department of Anaesthesiology, Hadassah University Hospital, Mount Scopus, P.O.B. 24035, IL 91240 Jerusalem, Israel.
Note: [1] This work was supported in part by the Zelman Cowen Universities Fund, Australia.
Note: [2] Paper delivered at the Israel Microcirculation Society Meeting, Weizman Institute of Science, June 30, 1988.
Note: [] Accepted by: Editor L. Dintenfass
Abstract: Blood viscosity factors were compared in 28 adult ASA I and II surgical patients during intravenous (14 patients) and halothane (14 patients) anaesthesia lasting 45–60 minutes. Systolic and diastolic blood pressures, O2 saturation and end-tidal CO2 values were monitored continuously and checked by blood gas and pH analysis. Intravenous fluids (Ringer’s lactate) were limited to 4 ml/kg/hour. While haematocrit was equally reduced (p < 0.005) in both groups, indicating comparable haemodilution, there were in the halothane group significantly greater reductions in (a) blood viscosity at all the five shear rates measured (230, 115, 46, 23 and 11.5 seconds−1), particularly at the lower two shear rates, (b) plasma viscosity and (c) fibrinogen and albumin concentrations in the plasma. These blood viscosity reductions point to a possible lessening of red blood cell aggregation with halothane anaesthesia, which then could have a rheological advantage over purely intravenous anaesthesia.
Keywords: blood rheology, blood viscosity, plasma viscosity, halothane anaesthesia, intravenous anaesthesia
DOI: 10.3233/CH-1990-10108
Journal: Clinical Hemorheology and Microcirculation, vol. 10, no. 1, pp. 65-79, 1990
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