ARUP's Laboratory Test Directory
| 0020002: Potassium, Plasma or Serum |
| Test Mnemonic: K | |
|
Methodology: Ion-Selective Electrode
Performed: Sun-Sat Reported: Within 24 hours |
| Specimen Required: | |
|
Collect: One 4 mL PST or SST.
Transport: 1 mL plasma or serum at 2-8°C. (Min: 0.2 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.2 mL plasma or serum at 2-8°C. Remarks: Allow serum to clot completely at room temperature. Separate serum or plasma from cells ASAP. Unacceptable Conditions: Hemolyzed specimens. Specimens collected in sodium fluoride or potassium oxalate, citrate or EDTA. Stability: After separation from cells: Ambient: 2 weeks; Refrigerated: 2 weeks; Frozen: 6 months |
|
| Reference Interval: |
|
0-7 days: 3.2-5.5 mmol/L 8 days-1 month: 3.4-6.0 mmol/L 2-6 months: 3.5-5.6 mmol/L 7-11 months: 3.5-6.1 mmol/L 1 year and older: 3.3-5.0 mmol/L |
| CPT Code(s): | |
| 84132 |