NH₃
24 hours
Enzymatic
Accredited NRL Laboratory
Daily
Assesses blood ammonia levels. Elevated in liver failure, urea cycle disorders, or metabolic encephalopathies.
Plasma, Frozen
1 mL
Lavender-top (EDTA) tube
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
Freeze immediately
| Temperature | Period |
|---|---|
| Frozen -20°C | 3 days |
| Frozen -60°C to -90 °C | 4 weeks |