Sodium, Urine
Also known as: U NA
Use
The Sodium, Urine test is used to evaluate the electrolyte balance in the body, which can be essential in diagnosing kidney disorders, dehydration, or conditions affecting sodium metabolism. It is often a component of studies investigating nephrolithiasis, hypertension, or disorders involving fluid balance. The test measures the concentration of sodium in urine over a given period, typically a 24-hour collection, providing valuable insights for clinical decision-making.
Special Instructions
Not provided.
Limitations
While the Sodium, Urine test is instrumental in assessing sodium excretion, variations in urine volume and collection time can impact the accuracy of results. Factors such as incomplete collection, changes in dietary sodium intake, or health conditions affecting water balance can influence outcomes. The test assumes a standard daily urine volume, and significant deviations may require adjustment in interpretation. Additionally, urine specimens with altered pH are not suitable for this analysis and should be avoided to ensure reliable outcomes.
New York Approved
Methodology
Other
Biomarkers
Creatinine, Urine
AnalyteSodium, Urine
Analyte
LOINC Codes
- 19153-6 - Specimen vol ?Tm Ur
- 2162-6 - Creat 24h Ur-mRate
- 2956-1 - Sodium 24h Ur-sRate
- 30211-7 - Specimen collect Time Spec
- 35674-1 - Creat ?Tm Ur-mCnc
- 35678-2 - Sodium ?Tm Ur-sCnc
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
Not provided
Minimum Volume
0.2 mL
Container
Transport 1 mL aliquot of urine from a well-mixed collection.
Patient Preparation
24-hour urine with no additive. Refrigerate during collection. Also acceptable: Random urine.
Storage Instructions
Refrigerated.
Causes for Rejection
pH adjusted urine specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 2 weeks |
| Frozen | 1 month |
Other tests from different labs that may be relevant