FENa Calculator (Fractional Excretion of Sodium)

Calculates the Fractional Excretion of Sodium (FENa) using patient input data such as serum sodium, creatinine, urine output, and blood urea nitrogen levels. This calculation provides a ratio that estimates how much sodium is being excreted by the kidneys relative to the amount of sodium filtered out. By analyzing these key clinical metrics, the tool generates an essential value used in differential diagnosis for kidney function issues. Clinicians utilize this resource when evaluating patients presenting with acute kidney injury or suspected nephrogenic causes of fluid imbalance. A low or high FENa result helps medical professionals narrow down the potential etiology of declining renal function, guiding decisions regarding specific treatment adjustments or further diagnostic testing.