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HelpTest Code LAB436 Potassium, Urine, 24 hour
Specimen Requirement
Refrigerate – no additional preservative is needed.
24-hour urine collection – submit entire collection to laboratory.
Note: Specimens visibly contaminated with blood are unsuitable for testing.
Referring lab: submit 5.0 mL aliquot from a total 24-hour urine collection.
24-hour total volume is required on request form for processing.
Specimen Stability
45 days at 20-25° C
2 months at 2-8° C
Testing Schedule
Daily
Reference Range
30 - 90 mmol/24 Hr
Testing Department
Chemistry
Method
Ion selective electrode diluted (Indirect)
CPT Code
84133
Outpatient Turnaround Time
Within 8 hours of collection
Inpatient STAT Turnaround Time
Not Applicable
Inpatient Routine Turnaround Time
4 hours after receipt