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[Clinical aspects of research on the rheological properties of the blood].

It has been said occasionally that haemorheology is a modern science. This is true in methodological but not in conceptional respect. While it cannot be debated that medical haemorheology has greatly profited from the contemporary refinement of techniques, the concepts of haemorheology belong to the oldest concept pursued in medicine. The essence of the present state of haemorheology is the idea that blood loses its physiological fluidity in disease.