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The Role of Measurement in Peripheral Vascular Surgery

There were a number of differences between patients with intermittent claudication who had a high blood viscosity and those who did not. Many of the patients with abnormally high blood viscosity had a surprisingly normal arteriogram despite severe symptoms of claudication. They also tended to have more severe symptoms; for instance patients with a blood viscosity above 4.5 cP (at a shear rate of 230 s-1) had an average claudication distance of 138 yards (126 m) compared to 316 yards (289 m) for the patients with a blood viscosity below that level. Their prognosis was also different. Those with an initially high blood viscosity had a significantly worse prognosis than claudicants with a normal viscosity.