A 51-year-old woman has been suffering from glomerulonephritis for 25 years. Recently appeared complaints of weakness, sleep disturbances, dyspepsia, skin itching. Objectively observed: Heart rate 110/min, blood pressure- 180/120 mm Hg, sluggishness, pallor of the skin, edema. Heart sounds are rhythmic, dull, pleural friction noise. During auscultation, the lungs are heard moist rales in the lower regions. In the biochemical analysis of blood: creatinine - 0.9 mmol/l. Which one stage of chronic renal failure most likely developed in the patient?