Venous stasis and deep-vein thrombosis

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Abstract
A venographic technique for studying stasis in the deep veins of the legs of conscious patients is described. A second technique involving the clearance of radioactive material from the veins has been developed for use during operation. The results of the two methods correlate closely. There is considerable stasis of the blood, particularly in the soleal veins, in conscious patients with the legs horizontal, and it is prolonged considerably during surgery. Using these new techniques the effectiveness of various methods said to prevent stasis has been assessed.