Calculates fractional excretion of chloride from paired urine and serum measurements.
Fractional Excretion of Chloride: Clinical Guide
Browse Knowledge HubCalculates fractional excretion of chloride from paired urine and serum measurements.
Overview
Calculates fractional excretion of chloride from paired urine and serum measurements.
Clinical Significance
Interpret with volume status, diuretic exposure and acid–base context.
When to Use
- Use as decision support when all required inputs are reliable.
How It Is Calculated
- FECl (%) = 100 × (UCl × SCr)/(SCl × UCr), using consistent creatinine units.
Interpretation
- Interpret with volume status, diuretic exposure and acid–base context.
Worked Example
Enter verified values in the displayed units; MedicalC applies the published equation or point system.
Limitations
- Prediction models may be miscalibrated outside their derivation population.
- Measurement and classification error can materially change the result.
Clinical Pearls
- Document source values and units with the result.
- Use trends and the full clinical picture.
Common Mistakes
- Wrong units.
- Using non-contemporaneous inputs.
- Treating the output as a diagnosis or mandatory treatment decision.
Frequently Asked Questions
What does this tool calculate?
Calculates fractional excretion of chloride from paired urine and serum measurements.
Can the result be used alone?
No. Interpret it with the complete clinical assessment and current guidance.
References
- Standard renal clearance relationship. — Primary or supporting reference for the implemented model.
Reviewed by: MedicalC Clinical Editorial Team
Last reviewed: July 2026
Clinical Disclaimer
MedicalC calculators and clinical tools are intended to support healthcare professionals. They do not replace clinical judgement, individual patient assessment, local guidance or specialist advice.
Results should always be interpreted in the context of the patient’s history, examination, investigations, current clinical condition and applicable professional guidance.