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Laboratory Test Directory

Potassium, Urine Output (Updated)


Name Method Department Units
Potassium, Urine Timed Ion selective electrode
Core Lab, Chemistry, Routine

Specimen Requirements

Urine, 24 hours

Container Type Container Size Specimen Volume

24 hour urine container


Room temperature - 4 day(s)
Refrigerated - 7 day(s)
Frozen - 6 month(s)

Specimen Preparation

  • Ship entire specimen to laboratory refrigerated
  • Urine collection: Note start and stop dates and times on requisition
  • Refrigerate during collection

Reasons for Rejection

  • Use of urine preservative
  • Loss of some specimen during collection
  • Collected in diaper or cotton balls


Indicate start and stop time and date on the requisition.

CPT Code

  • 84133