Feb 1, 2018




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Chemistry

Electrolytes, Urine, Timed

Electrolytes, Urine, Timed (HCULYT) Chemistry Lab Test

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

Test Component:

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

Collection Instructions:

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

Stability Ambient:

45 days

Stability Refridgerated:

45 days

Stability Frozen:

1 year

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.

Specimen Transport:

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.