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Potassium without Creatinine, 24 Hour Urine
Test Code11316
CPT Codes
84133
Includes
CPT code 81050 may be added at an additional charge for volume measurement
Preferred Specimen
10 mL of a 24-hour urine collected in a no-preservative plastic urine container
Minimum Volume
2 mL
Other Acceptable Specimens
Urine collected with boric acid, acetic acid, or HCl urinalysis transport tube (yellow-top, blue fill line, preservative tube)
Instructions
Record total volume and collection duration on specimen container and test requisition
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 14 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
22-160 mmol/24 h
Clinical Significance
Urinary excretion of potassium is increased in primary aldosteronism. It is often increased in dehydration and in salicylate toxicity. Decreased levels are seen in malabsorption.