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Potassium, 24-Hour Urine with Creatinine
Test Code734
CPT Codes
82570, 84133
Includes
CPT code 81050 may be added at an additional charge for volume measurement
Preferred Specimen
10 mL of an unpreserved 24-hour urine collection submitted in a plastic urine container
Minimum Volume
2 mL
Other Acceptable Specimens
24-hour urine preserved with boric acid, acetic acid, or HCl • Urinalysis transport tube (yellow-top, blue fill line, preservative tube)
Instructions
Record total volume and collection time on specimen container and requisition
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 60 days
Refrigerated: 14 days
Frozen: 60 days
Methodology
Ion Selective Electrode (ISE)
Setup Schedule
Set up: Daily; Report available: 2-3 days
Reference Range
See Laboratory Report
Clinical Significance
Assessment of hydration status and overall electrolyte balance.
