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HelpTest Code AMON Ammonia, Plasma
Additional Codes
LAB47
Collection Instructions
Draw blood in a chilled tube. Tube should be filled to capacity and immediatley placed on ice. Specimen must arrive in the laboratory within 15 minutes of collection.
Collection Method
Venous collection
Container
Purple (EDTA)
Specimen Type
Preferred- Purple EDTA
Acceptable- Purple EDTA
Minimum Volume
0.5ml
Specimen Stability
| Ambient | 30 minutes |
| Refrigerated (4°C to 8°C) | 2 hours |
| Frozen(-40°C to 0°C) | 3 days |
Reference or Target Ranges
| Age | Male | Female |
| all ages | 16-60 | 11-51 |
Reportable Units
umol/L
Critical Value
≥ 100 umol/l
Reasons for Rejection
| Hemolysis Threshold | 100 mg/dL |
| Icterus Threshold | 60 mg/dL |
| Lipemia Threshold | 700 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
82140
Last review/edit date
2025