Аннотация:Peroxide chemiluminescence of blood plasma (PL) obtained at selective catheterization of the vessels (SCV) was measured in 40 patients with different renal diseases. PL was found to vary in different parts of the vascular bed, in veins being higher than in arteries. Combination of SCV with following PL measurement in blood samples is an additional indicator of the patients' free radical status and method of topical diagnosis of different renal diseases and those of other organs.