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Plain Green Tube (Heparinized Plasma)
Specimen Requirements
Preferred:
Container/Tube: Plain Green Tube (Heparinized Plasma)
Minimum Volume: Tube MUST be Completely filled.
Collection Instructions: Must collect on ice. Tube MUST be COMPLETELY filled. Must arrive at Laboratory within 30 minutes of collection. Collect in a plain green top tube without the separator gel.
- TUBE MUST BE FILLED AND THE CAP REMAIN ON OR TEST IS INVALID *
(Filled pediatric tubes are acceptable.)
Specimen Stability
Ambient: N/A
Refrigerate: N/A
Frozen: 30 minutes On Ice
Reference Range
| Criteria | Reference Range | Units | Critical Range |
| 0 - 2 Weeks | < 90 | umol/L | > 100 |
| 2+ Weeks - <18 Years | < 50 | umol/L | > 100 |
| 18+ Years | 18 - 72 | umol/L | > 100 |
Methodology
Enzymatic Rate
CPT
82140
Test Alias
NH3
Lab Handling
Spin and run immediately.