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HelpTest Code K+ Potassium, Plasma or Serum
Additional Codes
LAB114
Performing Laboratory
Central Peninsula Hospital
Collection Method
Venous collection
Container
Lt Green / Plasma Separator / Lithium Heparin
Specimen Type
Preferred
- Plasma- Light Green Top (Lithium heparin)
Acceptable
- Serum- Gold Top SST or Red Top
Minimum Volume
0.5ml
Specimen Stability
| Ambient | 14 days |
| Refrigerated (4°C to 8°C) | 14 days |
| Frozen(-40°C to 0°C) | 1 year |
Reference or Target Ranges
| Age | Male | Female |
| < 2 days | 3.7 - 5.9 | 3.7 - 5.9 |
| 2 day to 3 months | 3.4 - 5.6 | 3.4 - 5.6 |
| 3 month to 18 years | 3.5 - 5.5 | 3.5 - 5.5 |
| > 18 years | 3.4 - 5.1 | 3.4 - 5.1 |
Reportable Units
mmol/L
Critical Value
≤ 2.5mmol/L
≥ 6.0 mmol/L
Reasons for Rejection
| Hemolysis Threshold | 90 mg/dL |
| Icterus Threshold | 60 mg/dL |
| Lipemia Threshold | 2000 mg/dL |
| Other | QNS, contaminated, improperly labeled, improper specimen type |
Performance Information
| Days and Time Performed | 24/7 |
| Expected Turn Around Time |
Stat: 1 hour Routine: 4 hours |
| Stat Availability | Yes |
| Performing Bench | CPH Chemistry |
| Methodology/Method Description | Roche Cobas |
CPT Codes
84132
Last review/edit date
2025