The effect of pentoxifylline on the flow properties of human blood

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Abstract
Recent investigations have revealed that erythrocytes from patients with chronic arterial occlusive disease are significantly less deformable than red blood cells from healthy subjects. The influence of pentoxifylline on red blood cell fluidity was measured by a standard filtration technique using 8 micron membrane filters. Impaired deformability of erythrocytes was significantly improved in patients suffering from peripheral vascular disorders following intravenous injection of 200 mg pentoxifylline. Studies on reduced red cell deformability induced by hyperosmolarity in vitro showed that pentoxifylline (4 and 20 microgram/ml) produced a dose-dependent improvement both in blood from healthy subjects and from patients with peripheral arterial occlusive disease. The results suggest that the positive therapeutic effect of pentoxifylline in peripheral arterial occlusive disease is mediated by improving red cell fluidity in the microcirculation.

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