Template:FENa Calculator - Revision history

Danbot: Add wikilinks for AKI and ATN

2026-03-21T16:51:59Z

Add wikilinks for AKI and ATN

← Older revision		Revision as of 16:51, 21 March 2026
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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%

Danbot: Add === Fractional Excretion of Sodium (FENa) === subheading for TOC visibility

2026-03-21T15:51:48Z

Add === Fractional Excretion of Sodium (FENa) === subheading for TOC visibility

← Older revision		Revision as of 15:51, 21 March 2026
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	[[Category:Calculator templates]]		[[Category:Calculator templates]]
	</noinclude>		</noinclude>
			=== 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;"

Danbot: Add references

2026-03-21T12:55:18Z

Add references

← Older revision		Revision as of 12:55, 21 March 2026
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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
			\|}

			{\| class="wikitable" style="width:100%; margin-top:4px; font-size:90%;"
			! References
			\|-
			\|
			* 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.
	\|}		\|}
	</div>		</div>

Danbot: Create FENa calculator template (fractional excretion of sodium)

2026-03-21T12:35:15Z

Create FENa calculator template (fractional excretion of sodium)

New page

<noinclude>
Interactive FENa (Fractional Excretion of Sodium) calculator. Requires the [[MediaWiki:Gadget-calculator.js|calculator gadget]].

Usage: <code><nowiki>{{FENa Calculator}}</nowiki></code>
[[Category:Calculator templates]]
</noinclude>
<div class="calculator-container" data-calculator-refresh-on-load="true">
{| class="wikitable" style="width:100%; border-collapse:collapse;"
|+ style="font-size:16px; font-weight:bold; padding:8px; background:#1a5276; color:white;" | FENa — Fractional Excretion of Sodium
|-
! style="width:50%; background:#d4e6f1;" | Parameter
! style="width:50%; background:#d4e6f1;" | Value
|-
| '''Serum Sodium''' (mEq/L)
| {{calculator|id=fe_sna|type=number|placeholder=e.g. 140|min=100|max=200|size=8}}
|-
| '''Serum Creatinine''' (mg/dL)
| {{calculator|id=fe_scr|type=number|placeholder=e.g. 1.2|min=0|max=30|size=8|step=0.1}}
|-
| '''Urine Sodium''' (mEq/L)
| {{calculator|id=fe_una|type=number|placeholder=e.g. 15|min=0|max=300|size=8}}
|-
| '''Urine Creatinine''' (mg/dL)
| {{calculator|id=fe_ucr|type=number|placeholder=e.g. 100|min=0|max=500|size=8}}
|-
! style="background:#1a5276; color:white;" | FENa (%)
! style="background:#1a5276; color:white; font-size:18px;" | {{calculator|id=fe_result|type=plain|formula=(fe_una*fe_scr)/(fe_sna*fe_ucr)*100|decimals=2|NaN-text=—|style=min-width:4ch;display:inline-block}} %
|}

{| class="wikitable" style="width:100%; border-collapse:collapse; margin-top:4px;"
|-
! colspan="2" | Interpretation (in setting of oliguria/AKI)
|-
| style="background:#27ae60; color:white; text-align:center; width:20%; font-weight:bold;" | <1%
| '''Pre-renal''' azotemia — Kidneys are sodium-avid (hypoperfusion, hypovolemia, heart failure, cirrhosis). Consider volume resuscitation.
|-
| style="background:#e74c3c; color:white; text-align:center; font-weight:bold;" | >2%
| '''Intrinsic renal''' disease — ATN, AIN, or glomerulonephritis. Kidneys unable to concentrate urine.
|-
| style="background:#f39c12; color:white; text-align:center; font-weight:bold;" | 1–2%
| '''Indeterminate''' — May be seen in early ATN or with mixed etiologies. Clinical correlation required.
|-
! colspan="2" | Important Caveats
|-
| colspan="2" |
* FENa is '''unreliable on diuretics''' — use '''FEUrea''' instead
* Low FENa (<1%) can be seen in contrast nephropathy, rhabdomyolysis, early obstruction
* Not validated in '''CKD''' patients
|}
</div>