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Fractional Excretion of Sodium (FeNa) Acute Kidney Injury Calculator

Easily calculate and compute fractional excretion of sodium (fena) acute kidney injury calculator with accurate equations, live formulas, and expert guidance.

Calculated Result
0.21 %

Fractional Excretion of Sodium (FeNa)

Fractional Excretion of Sodium (FeNa)

0.21 %

Fractional Excretion Percent

0.21

Etiology Category

Prerenal Azotemia (< 1.0%): Renal hypoperfusion / volume responsive

0.21 — %

Calculation Breakdown

  1. Applied FormulaDifferentiates prerenal azotemia from intrinsic acute tubular necrosis in oliguric acute kidney injury.\text{FeNa} = \dfrac{U_{\text{Na}} \times S_{\text{Cr}}}{S_{\text{Na}} \times U_{\text{Cr}}} \times 100\%

FeNa AKI Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.00.30.50.81.0Fractional Excretion of Sodium (FeNa)

What Is the Fractional Excretion of Sodium (FeNa) Acute Kidney Injury Calculator?

This tool computes fractional excretion of sodium (fena) acute kidney injury calculator with high precision arithmetic.

How Does the Fractional Excretion of Sodium (FeNa) Acute Kidney Injury Calculator Work?

Differentiates prerenal azotemia from intrinsic acute tubular necrosis in oliguric acute kidney injury.

Fractional Excretion of Sodium (FeNa) Acute Kidney Injury Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

FeNa=UNa×SCrSNa×UCr×100%\text{FeNa} = \dfrac{U_{\text{Na}} \times S_{\text{Cr}}}{S_{\text{Na}} \times U_{\text{Cr}}} \times 100\%

Differentiates prerenal azotemia from intrinsic acute tubular necrosis in oliguric acute kidney injury.

How to Use the Fractional Excretion of Sodium (FeNa) Acute Kidney Injury Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Fractional Excretion of Sodium (FeNa) Acute Kidney Injury Calculator Example

Input Values:

urineSodiumMEqL:15
serumSodiumMEqL:140
urineCreatinineMgDl:100
serumCreatinineMgDl:2
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required %.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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