Potassium, Serum
Use
This test is used for the evaluation of electrolyte balance, helps to monitor cardiac arrhythmias, muscular weaknesses, hepatic encephalopathy, and renal failure. Potassium levels are crucial in maintaining many body functions and disturbances in potassium homeostasis can have severe physiological implications.
Special Instructions
Patient's age and sex are required for this test order. If not ordering electronically, complete one of the provided test request forms and send it with the specimen.
Limitations
No significant cautionary statements are noted, however, improper specimen collection and handling can interfere. It is important to centrifuge serum gel tubes within 2 hours of collection, and red-top tubes should be centrifuged and aliquoted into a plastic vial within 2 hours of collection.
FDA ApprovedNew York Approved
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
LOINC Codes
- 2823-3
- 2823-3
Result Turnaround Time
1-2 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL
Minimum Volume
0.25 mL
Container
Preferred: Serum gel; Acceptable: Red top; Submission Container/Tube: Plastic vial
Collection Instructions
Serum gel tubes should be centrifuged within 2 hours of collection. Red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial within 2 hours of collection.
Causes for Rejection
Gross hemolysis
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 48 hours |