Renal clearance ratio

Renal clearance ratio

The renal clearance ratio or fractional excretion is a measure of the speed at which a constituent of urine passes through the kidneys. It is defined by following equation:

: clearance ratio of X = frac{C_x}{C_{in
*X is the analyte substance
*Cx is the renal plasma clearance of X
*Cin is the renal plasma clearance of inulin.

Creatinine is sometimes used instead of inulin as the reference substance.

ee also

*Kt/V


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