FENa - Fractional Excretion of Sodium play online

This app calculates the fractional excretion of sodium based on the serum and urine sodium and creatinine values. Based on the FENa value the associated etiology of pre-renal, intrinsic and post-renal disease can be deduced. A link to the FENa Wikipedia page is included. A custom keyboard makes it quite easy to enter the measurements on serum and urine. No need to press a calculate button, the FENa is calculated real-time as you type. Change the unit of measure by pressings the unit of measure buttons.