Sodium (Urine)
The urine sodium test measures the amount of sodium excreted in urine. It helps evaluate fluid balance, kidney function, and the cause of abnormal blood sodium levels.
Category: Urinalysis
Also known as: urine sodium, sodium urine, urinary sodium, urine na
Reference range: 40–220 mEq/L (Source: ABIM)
Standard unit: mEq/L
High values may indicate
High urine sodium may indicate excessive salt intake, adrenal insufficiency, kidney disease (salt-wasting nephropathy), or diuretic use.
Low values may indicate
Low urine sodium may indicate dehydration, heart failure, liver cirrhosis, nephrotic syndrome, or aldosterone excess.
Frequently asked questions
- What is a normal Sodium (Urine) level?
- A typical reference range for Sodium (Urine) is 40–220 mEq/L (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Sodium (Urine) measured in?
- Sodium (Urine) is most commonly reported in mEq/L. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Sodium (Urine) reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Sodium (Urine) over time?
- Yes. Upload results from any lab and BloodId charts your Sodium (Urine) over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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