A study has been made of a number of haematological and haemorheological factors following venesection therapy. Haematocrit was very effectively reduced by the venesection regimen and led to a fall in whole blood viscosity in spite of the microcytosis that was eventually induced in all the subjects. No clinically significant coagulation changes were observed. It is concluded that a simple venesection regimen without volume replacement is a safe procedure for improving blood rheology.
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Challoner et al. (1986) studied this question.
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