Renal failure is a relatively common disease in nephrology, and generally requires relevant examination items to discover the condition, as follows: 1. urine routine: urine specific gravity is decreased or fixed, proteinuria is positive, and there will be different degrees of hematuria and tubular urine; 2. blood routine: hemoglobin and red blood cell count is low, red blood cell pressure and reticulocyte count is reduced; 3. biochemical examination: blood urea nitrogen and creatinine will have different degrees of 4, ultrasound examination: renal ultrasound shows a reduction in the volume of both kidneys and enhanced renal cortical echogenicity; 5, nuclear renal dynamic imaging: decreased glomerular filtration rate and renal excretory dysfunction; 6, nuclear bone scan: renal osteodystrophy sign; 7, chest X-ray: pulmonary bruising or pulmonary edema, increased cardiothoracic ratio, pericardial effusion, pleural effusion, etc.; 8, kidney biopsy: helps early diagnosis of chronic renal insufficiency primary The diagnosis of the primary disease of chronic renal insufficiency.