Renal clearance ratio - Alchetron, The Free Social Encyclopedia

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:

c l e a r a n c e r a t i o o f X = C x C i n

X is the analyte substance

C_x is the renal plasma clearance of X

C_in is the renal plasma clearance of inulin.

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

References

Renal clearance ratio Wikipedia

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