The so-called CKD refers to chronic kidney disease. According to the glomerular filtration rate, CKD is divided into 5 stages, where stage 5 means that the patient's glomerular filtration rate has fallen below 15 milliliters per minute, which is equivalent to uremia.

Chronic renal failure is irreversible and cannot be recovered, so it is impossible for patients whose condition has progressed to later stages to recover. Therefore, for such conditions, the only option is to choose renal replacement therapy so that the patient can survive. Renal replacement therapy mainly includes hemodialysis, peritoneal dialysis, or kidney transplantation.