In addition to standard viscosity testing, SwRI offers rheology testing for more comprehensive and customized fluid evaluations. SwRI offers a variety of viscosity test procedures and viscosity measurement methods, including: Measures dynamic viscosity at very high shear rates.Measures dynamic and kinematic viscosity, and density.Anton Paar SVM 3000 Stabinger Viscometer.SwRI utilizes two rotary type viscometers to measure fluid viscosity at different shear rates and temperatures: Essentially, it is a measure of how “thin” or “thick” a fluid appears under a certain stress and environment. It describes the internal friction of the fluid components. Viscosity is a measure of a fluid’s resistance to deform and flow under an applied stress. This correlation may be useful for anticipating the need for repeat plasmapheresis.The Anton Paar SVM 3000 viscometer is able to perform testing for density as well as dynamic and kinematic viscosity Vane rheometry is the measure of material flow or deformation behavior with vane spindles.
Viscometry, in particular, is the measurement of viscosity or the resistance to flow. A common definition is that rheology is the study of flow.
Serum viscosity and electrophoresis are recommended before and after plasmapheresis in order to correlate viscosity and M-spike with patient symptoms. Rheology is the study of the deformation of matter. Hyperviscosity syndrome can also occur in multiple myeloma patients.īecause the ability of a monoclonal protein to cause hyperviscosity is affected by its concentration, molecular weight, and aggregation, sera with concentrations of monoclonal IgM greater than 4 g/dL, IgA greater than 5 g/dL, or IgG greater than 6 g/dL should be tested for hyperviscosity. The most common cause of serum hyperviscosity is the presence of large concentrations of IgM monoclonal proteins, and Waldenstrom macroglobulinemia accounts for 80% to 90% of hyperviscosity cases. Funduscopic examination reveals dilation of retinal veins and flame shaped retinal hemorrhages. Hyperviscosity may be manifested by nasal bleeding, blurred vision, headaches, dizziness, nystagmus, deafness, diplopia, ataxia, paresthesias, or congestive heart failure. Viscosity is the property of fluids to resist flow.
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