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Clinical implications of impaired microcirculation.

Various types of microcirculation disturbances have been described in the course of systemic diseases, hypertension, diabetes, obesity, and the so-called "idiopathic oedema" syndrome. This article summarizes the relevant microcirculatory disorders associated with diabetes and their pathophysiology. These functional disorders occur before or in association with anatomical lesions of diabetic microangiopathy. Increased capillary permeability to albumin is frequently observed in diabetes. In a placebo-controlled trial, Daflon 500 mg, a purified, micronized, flavonoidic fraction, significantly improved this disorder. Patients complaining of an oedematous syndrome almost always have an increased extracellular fluid volume, probably largely due to increased capillary permeability. Diabetes and "idiopathic oedema" therefore constitute two examples of the major clinical implications of impaired microcirculation.