Name: Electrolytes, Urine, Timed
Test Name: Electrolytes, Urine, Timed
Health Link Test Code: HCULYT
LIS Test Code: ULYT, VP
CPT Code(s): 84133, 84300, 81050
Urine Sodium and Potassium
Methodology: Ion Selective Electrode
Days Performed: Daily, 24 hours.
In-Lab Turnaround Time: 4 hours.
Stat In-Lab Turnaround Time: 1 hour.
Specimen: Timed urine
Collection Container: 24 hour urine container
Collect timed urine (if collection period is for 22-26 hours lab will order test Electrolytes, Urine, 24 Hours [UNAK]). No preservative is required. For timed urine collections, collect all urine in container provided. Add "Refrigerate" sticker to 24-hour container.
Collection period starts after first void of the period. It is very important to refrigerate specimen during and after the collection. Indicate the date and time collection started and date and time collection finished. If questions about collection process or container does not have instructions attached, call (608) 263-7060 for assistance.
Patient instructions available at www.uwhealth.org. Search for 24-hour urine collection or HF#4339.
Collection Volume: Entire collection
Sample Analyzed: Urine aliquot
Testing Volume: 1 mL
Pediatric Testing Volume: 0.4 mL
Outreach Specimen Processing:
Mix urine well and note volume and period. Transport 50 mL aliquot on coolant pack to the laboratory along with volume and period information.
Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.
Not calculated. Reported in mmol/L. Results calculated only for urine collection between 22-26 hours.