[The osmolarity of the blood and urine in patients with tuberculosis of the urinary system and chronic kidney failure].

Osmolarity and its constituents were followed up during the treatment course in 43 patients with tuberculosis of the urinary system and in 14 controls. The authors confirmed the relation of the blood and urinary osmolarity to the stage of chronic renal failure (CRF). CRF aggravation was evidenced by the development of hypo-osmolarity in the urine and a progressing decrease in the ratio coefficient between the osmolarity in the urine and in the plasma.