Renal clearance ratio

Diagram showing the basic physiologic mechanisms of the kidney

The renal clearance ratio or fractional excretion is a relative measure of the speed at which a constituent of urine passes through the kidneys.^[1]^[2] It is defined by following equation:

clearance\ ratio\ of\ X={\frac {C_{x}}{C_{in}}}

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[]

^ Rudolfs K. Zalups; Lawrence H. Lash (1996). Methods in Renal Toxicology. CRC Press. pp. 2–3. ISBN 978-1-4398-0560-2.
^ Khurana (2005). Textbook Of Medical Physiology. Elsevier India. pp. 561–2. ISBN 978-81-8147-850-4.

[ZalupsLash1996-1] Rudolfs K. Zalups; Lawrence H. Lash (1996). Methods in Renal Toxicology. CRC Press. pp. 2–3. ISBN 978-1-4398-0560-2.

[Khurana2005-2] Khurana (2005). Textbook Of Medical Physiology. Elsevier India. pp. 561–2. ISBN 978-81-8147-850-4.

[1]

[2]

Renal clearance ratio

See also[]

References[]