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Test Code UNA24H Sodium Urine, Timed LAB446

Performing Laboratory

UnityPoint The Finley Hospital

Test Method

Ion Selective Electrode method; Roche cobas Pro

Performance

Testing is performed Monday through Sunday.

Typically assayed within 2 hours after the specimen
arrives at the testing site.

Specimen Requirement

Collect a timed urine specimen, 24 hour preferred. No
preservative is required. Label the specimen appropriately with two
identifiers, patient name and another identifier, (patient ID
number, DOB, etc.) include date and time of
collection. Indicate the time period of collection on the
container. Submit entire specimen for analysis. Store the urine
specimen refrigerated and transport to the lab within 48 hours.

Useful For

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

Reference Values

 40‑220 mmol/24 hours

  • Timed urine collection are reported in mmmol/24 Hours regardless
    of collection time.

CPT Code Information

82436 Chemistry: Sodium, urine

LOINC Code Information

2956-1 Sodium [Moles/Time] In 24 Hour Urine