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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Electrolytes, Urine

Test Code(s): ULYT / HCULYT

CPT Code(s): 84300, 84133

Test Description: Test Component:

Urine Sodium and Potassium

Methodology: Ion Selective Electrode

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: 1 hour.
Routine: 4 hours.

Specimen Requirements

Specimen: Random urine

Collection Container: Preferred: Sterile screw cap container

Collection Volume: Preferred: Entire collection
Pediatrics: Entire collection

Sample Analyzed: Urine aliquot

Volume Required: Preferred: 1 mL
Pediatrics: 0.4 mL

Specimen Transport: Transport entire specimen to UWHC Core Laboratory (B4/220). Transport with coolant pack if coming from outreach location.

Stability: Ambient: 5 days
Refrigerated: 5 days
Frozen: Not acceptable




Not calculated. Random urines reported in mmol/L.

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