Test Code UNA24H Sodium Urine, Timed LAB446
Test Method
Ion Selective Electrode Potentiometry; Beckman DXC600
Specimen Requirement
0.5 mL urine is required.
Additional Specimen Collection Information
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.
Reference Values
43-217 meq/24 hours
- Timed urine collection are reported in meq/24 Hours
regardless
of collection time.
Performance
Testing is performed Monday through Sunday.
Typically assayed within 2 hours after the
specimen
arrives at the testing site.
Useful For
Assessing acid-base balance, water balance, water
intoxication,
and dehydration
LOINC Code Information
2956-1 Sodium [Moles/Time] In 24 Hour Urine
CPT Code Information
82436 Chemistry: Sodium, urine