In clinical work, there are often patients with ultrasound report sheets, consulting why the kidneys have become smaller, we have one kidney on each side of the crista in adults, 10-12cm long, 5-6cm wide and 3-4cm thick, if the kidneys are shrinking at the same time bilaterally, and the ultrasound suggests that the kidneys are not smooth to the touch, with diffuse damage and thinning of the renal cortex, this situation is mostly seen in chronic kidney diseases resulting in kidney The main means of treatment is to slow down the deterioration of kidney function by controlling blood glucose, blood pressure, lipids and other integrated treatments. Uremia, which requires renal replacement therapy (hemodialysis, peritoneal dialysis). If one kidney is shrinking and the other kidney is normal, this is often seen in renal artery stenosis, which can be clearly diagnosed by checking renal artery ultrasound, CTA, angiography, etc., and check the ECT of both kidneys to assess the function of both kidneys and determine whether stent implantation therapy is needed, if the atrophied side kidney and no kidney function, then it is not significant to place stent, pay attention to control the complications, as well as the application of statin If there is no renal function on the atrophic side of the kidney, then it is meaningful to place a stent.