Chronic kidney failure is that develop from all kinds of primary kidney disease or secondary kidney disease. The kidney progressive damage and the excretory, secretory and the function of regulating body’s metabolism is gradually slowing down. In medicine, chronic kidney disease have both generalized concepts and chivalrous concept. The chivalrous concept mainly refers to the stage of renal insufficiency. When the serum creatinine is equal or greater than 133umol/l, it is called chronic kidney function. The clinical doctors evaluate patients’ kidney function according to the values of serum creatinine and GFR.
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