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June 20 2013 03:25:15
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Renal Equations

GFR Estimation using the MDRD Equation (Modification of Diet in Renal Disease Study Group)
GFR = (170 x (PCr )exp[-0.999]) x (Age exp[-0.176]) x ((SUrea)exp[-0.170]) x ((Albumin )exp[+0.318])
Select Unit:
std units
SI units
Plasma Creatinine
Gender
Male Female
Serum BUN
Race
White Black
Albumin
Age (years)
GFR (per 1.73 m2)

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Cockcroft and Gault equation: Estimated Creatinine Clearence
Creatinine Clearence = 140-Age*Weight (Kg)/ 72*Serum creatinine (* 0.85 for feamles)
Select Unit:
std units
SI units
Age (years)
Weight (kg)
Serum Creatinine
Gender
CrCl

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Measured Creatinine Clearence
Creatinine Clearence = Ucr * Uv/Pcr *1440
Select Unit:
std units
SI units
Urine Creatinine
Urine Volume (mL/day)
Serum Creatinine
Creatinine Clearence: CrCl

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Fractional Excretion of Sodium
FENa = [Urine Na]*[Plasma Cr]/[Urine Cr]*[Plasma Na]
Select Unit:
std units
SI units
Urine Sodium
Urine Creatinine
Serum Sodium
Serum Creatinine
FENa

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Trans-Tubular K+ Gradient
TTKG = [Urine K]*[Plasma Osm]/[Urine Osm]*[Plasma K]

Parameters

Urine Potassium

Urine Osmolality
Serum Potassium
Serum Osmolality
TTKG

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Urine Net Charge Calculator

Parameters

Urine Na

Urine K

Urine Cl
Urine Net Charge

Normal = negative

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·Newsletter: March, 2013

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