The viscosity of normal and pathological human synovial fluids

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Abstract
A simple type variable velocity gradient visco-simeter of low fluid capacity (0.3 ml) is described. Measurements of viscosity at various velocity gradients were carried out on a number of normal and pathological human synovial fluids. The effect of temperature and ilution was studied. It was concluded that the reduction of the viscosity anomaly relative to high velocity gradient viscosity is a sensitive test of abnormality in the fluid. The action of hyaluronidase was shown to cause normal fluids to resemble pathological fluids when tested in this way.