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Vanderbilt Pathology Laboratory Services

Test Directory



POTASSIUM 24 HR URINE (TKU)

Department: Chemistry
Test Synonym(s): TKU
CPT Codes: 84133
Methodology: Ion-selective electrode diluted (Indirect)
Reference Range: 0 to 150yrs: 25-125 mmol/day
Tube Type: 24 hour urine container - plain
Specimen: 24 hour urine-total 24 hour collection
Alternate Specimen: 24 hour urine container; Acid collection is not recommended
Volume: 50 mL urine
Minimum Volume: 15 uL urine
Stability: 45 Days at 20-250C, 2 months at 2-80C, 1 year at -200C
Reasons for Rejection: improper collection , QNS
Days Performed: Daily
Times Performed: Continuous
Special Instructions: Refrigerate during collection - label with beginning and ending collection times and dates - indicate total volume if an aliquot is sent. Mix specimen well before aliquoting.


Click here to print the 24 Hour Urine Collection Guide.

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