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HelpTest ID RNAUR Sodium, Random, Urine
Useful For
Assessing acid-base balance, water balance, water intoxication, and dehydration
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineSpecimen Required
Supplies: Sarstedt 5 mL Aliquot Tube (T914)
Container/Tube: Plastic, 5-mL tube
Specimen Volume: 4 mL
Collection Instructions:
1. Collect a random urine specimen.
2. No preservative.
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 14 days |
| Frozen | 30 days | |
| Ambient | 7 days |
Reference Values
No established reference values.
Random urine sodium may be interpreted in conjunction with serum sodium, using both values to calculate fractional excretion of sodium.
The calculation for fractional excretion (FE) of sodium (Na) is
FE(Na)= ([Na(urine)XCreat(serum)]/[Na(serum)XCreat(urine)])X100
CPT Code Information
84300
Reject Due To
| All specimens will be evaluated at Mayo Clinic Laboratories for test suitability. |
Secondary ID
610785Day(s) Performed
Monday through Sunday