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Article type: Research Article
Authors: Ernst, E. | Botzenhardt, R. | Matrai, A.; | Weimer, B. | von Arnim, T.
Affiliations: Hemorheology Research Laboratory, Department of Physical Medicine and Rehabilitation, AKH, University of Vienna, 1090 Vienna, Austria | 1st Department of Medicine, Klinikum Großhadern, 8000 München 70
Note: [] Deceased
Abstract: Plasma viscosity and the viscous component of blood viscosity were measured in an oscillatory capillary viscometer (OCR-D) and compared to the blood viscosity determined in the Contraves LS-30 machine at identical nominal shear rates and to plasma viscosity readings obtained in the Coulter Harkness capillary viscometer. The OCR-D system yields lower reproducibility compared to the other methods. It also gives lower absolute viscosity readings for blood at low shear rates. Hemoconcentration, as induced in vivo by a standard ergometer exercise, is less strongly reflected in the low shear blood viscosity data from the OCR-D system compared to the analogue results obtained in the LS-30. These findings suggest, that the OCR-D method is less reproducible and not directly comparable with the “conventional” methods. Possibly the latter are best for routine while oscillatory methods may give a more detailed analysis of specific questions.
Keywords: viscometry, oscillary capillary viscometer, rotational viscometer, methodological comparison
DOI: 10.3233/CH-1991-11603
Journal: Clinical Hemorheology and Microcirculation, vol. 11, no. 6, pp. 575-581, 1991
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