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Test Code RNAUR Sodium, Random, Urine

Reporting Name

Sodium, Random, U

Useful For

Assessing acid-base balance, water balance, water intoxication, and dehydration

Method Name

Potentiometric, Indirect Ion-Selective Electrode (ISE)

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Urine


Specimen 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 Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 14 days
  Frozen  30 days
  Ambient  7 days

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

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

Day(s) Performed

Monday through Sunday

CPT Code Information

84300

LOINC Code Information

Test ID Test Order Name Order LOINC Value
RNAUR Sodium, Random, U 2955-3

 

Result ID Test Result Name Result LOINC Value
RNAUR Sodium, Random, U 2955-3

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

NY State Approved

Yes

Report Available

Same day/1 to 2 days