Kidney disease patients are confused why they have decreased GFR already but
the creatinine is normal.
Creatinine is the metabolin of human muscle, and every 20g muscle metabolin
can produce 1 mg creatinine. Creatinine is discharged mainly by glomerulus. The
concentration change of serum creatinine is determined by glomerulus filtration
ability(GFR). If filtration ability decrease, the creatinine concentration will
increase. Serum creatinine is higher than the normal level, which means the
kidney gets damaged. Please notice that only GFR reduce to 1/3 of normal level,
serum creatinine begins to increase obviously.
The reason why patients present this phenomenon is because that kidney has
strong metabolic capacity, patients don’t have obvious discomfort if kidney has
light damage, but when patients present the symptoms like edema,vomiting,dizzy
etc, that means the kidney has already get damged seriously, and serum
creatinine begin to increase obviously.
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