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HelpTest Code AMON Ammonia, Plasma
Additional Codes
LAB47
Collection Method
Venous collection
Minimum Volume
0.5ml
Container
Purple (EDTA)
Acceptable Specimens
Purple (EDTA)
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 |
Specimen Stability
| Ambient | N/A |
| Refrigerated (4°C to 8°C) | 2 hours (plasma removed from cells) |
| Frozen(-40°C to 0°C) | 3 days (plasma removed from cells) |
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
Aliases
NH3, Blood Ammonia
Special 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.