Template:FENa Calculator: Difference between revisions
(Create FENa calculator template (fractional excretion of sodium)) |
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[[Category:Calculator templates]] | [[Category:Calculator templates]] | ||
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=== Fractional Excretion of Sodium (FENa) === | |||
<div class="calculator-container" data-calculator-refresh-on-load="true"> | <div class="calculator-container" data-calculator-refresh-on-load="true"> | ||
{| class="wikitable" style="width:100%; border-collapse:collapse;" | {| class="wikitable" style="width:100%; border-collapse:collapse;" | ||
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{| class="wikitable" style="width:100%; border-collapse:collapse; margin-top:4px;" | {| class="wikitable" style="width:100%; border-collapse:collapse; margin-top:4px;" | ||
|- | |- | ||
! colspan="2" | Interpretation (in setting of oliguria/AKI) | ! colspan="2" | Interpretation (in setting of oliguria/[[Acute kidney injury|AKI]]) | ||
|- | |- | ||
| style="background:#27ae60; color:white; text-align:center; width:20%; font-weight:bold;" | <1% | | style="background:#27ae60; color:white; text-align:center; width:20%; font-weight:bold;" | <1% | ||
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| style="background:#e74c3c; color:white; text-align:center; font-weight:bold;" | >2% | | style="background:#e74c3c; color:white; text-align:center; font-weight:bold;" | >2% | ||
| '''Intrinsic renal''' disease — ATN, AIN, or glomerulonephritis. Kidneys unable to concentrate urine. | | '''Intrinsic renal''' disease — [[Acute tubular necrosis|ATN]], AIN, or glomerulonephritis. Kidneys unable to concentrate urine. | ||
|- | |- | ||
| style="background:#f39c12; color:white; text-align:center; font-weight:bold;" | 1–2% | | style="background:#f39c12; color:white; text-align:center; font-weight:bold;" | 1–2% | ||
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* Low FENa (<1%) can be seen in contrast nephropathy, rhabdomyolysis, early obstruction | * Low FENa (<1%) can be seen in contrast nephropathy, rhabdomyolysis, early obstruction | ||
* Not validated in '''CKD''' patients | * Not validated in '''CKD''' patients | ||
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{| class="wikitable" style="width:100%; margin-top:4px; font-size:90%;" | |||
! References | |||
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* Espinel CH. The FENa test: use in the differential diagnosis of acute renal failure. JAMA. 1976;236:579-581. PMID 947239. | |||
* Steiner RW. Interpreting the fractional excretion of sodium. Am J Med. 1984;77:699-702. PMID 6486145. | |||
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</div> | </div> | ||
Latest revision as of 16:51, 21 March 2026
Interactive FENa (Fractional Excretion of Sodium) calculator. Requires the calculator gadget.
Usage: {{FENa Calculator}}
Fractional Excretion of Sodium (FENa)
| Parameter | Value |
|---|---|
| Serum Sodium (mEq/L) | |
| Serum Creatinine (mg/dL) | |
| Urine Sodium (mEq/L) | |
| Urine Creatinine (mg/dL) | |
| FENa (%) | % |
| Interpretation (in setting of oliguria/AKI) | |
|---|---|
| <1% | Pre-renal azotemia — Kidneys are sodium-avid (hypoperfusion, hypovolemia, heart failure, cirrhosis). Consider volume resuscitation. |
| >2% | Intrinsic renal disease — ATN, AIN, or glomerulonephritis. Kidneys unable to concentrate urine. |
| 1–2% | Indeterminate — May be seen in early ATN or with mixed etiologies. Clinical correlation required. |
| Important Caveats | |
| |
| References |
|---|
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