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Diagnostic serum creatinine studies are used to determine renal function. [4] The reference interval is 0.6–1.3 mg/dL (53–115 μmol/L). [4] It is simple to measure serum creatinine, and it is the most commonly used indicator of renal function. [6]
The normal range of GFR, adjusted for body surface area, is 100–130 average 125 (mL/min)/(1.73 m 2) in men and 90–120 (mL/min)/(1.73 m 2) in women younger than the age of 40. In children, GFR measured by inulin clearance is 110 (mL/min)/(1.73 m 2) until 2 years of age in both sexes, and then it progressively decreases. After age 40, GFR ...
A reference range is usually defined as the set of values 95 percent of the normal ... (Folic acid/Folate) – Serum: Age > 1 year: 3.0 ... BUN/Creatinine Ratio ...
The normal serum creatinine (sCr) varies with the subject's body muscle mass and with the technique used to measure it. For the adult male, the normal range is 0.6 to 1.2 mg/dl, or 53 to 106 μmol/L by the kinetic or enzymatic method, and 0.8 to 1.5 mg/dl, or 70 to 133 μmol/L by the older manual Jaffé reaction.
where SCr is serum creatinine (mg/dL), k is 0.7 for females and 0.9 for males, a is −0.241 for females and −0.302 for males, min indicates the minimum of SCr/k or 1, and max indicates the maximum of SCr/k or 1. As separate equations for different populations: For creatinine (IDMS calibrated) in mg/dL: Male If serum creatinine (Scr) ≤ 0.9
The GFR is derived from the serum creatinine and is proportional to 1/creatinine, i.e. it is a reciprocal relationship; the higher the creatinine, the lower the GFR. It reflects one aspect of kidney function, how efficiently the glomeruli – the filtering units – work. The normal GFR is 90–120 ml/min.
Diagnosis of acute failure is often based on a combination of factors such as decreased urine production or increased serum creatinine. [3] Diagnosis of chronic failure is based on a glomerular filtration rate (GFR) of less than 15 or the need for renal replacement therapy. [1] It is also equivalent to stage 5 chronic kidney disease. [1]
The standard definition of a reference range for a particular measurement is defined as the interval between which 95% of values of a reference population fall into, in such a way that 2.5% of the time a value will be less than the lower limit of this interval, and 2.5% of the time it will be larger than the upper limit of this interval, whatever the distribution of these values.
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