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HelpTest Code AMON Ammonia, Plasma
Additional Codes
LAB47
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.
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
Feb 2024