Above the range
Common causes of a high Ammonia
- Hepatic encephalopathy / liver failure
- Reye syndrome
- GI bleeding
- Portosystemic shunting
All tests · Liver Function (LFTs) · Ammonia
Above the range
What causes a high Ammonia?
Normal range 15-45 µg/dL (11-32 µmol/L SI). Specimen: Plasma (on ice). See the full Ammonia reference page for critical values and nursing considerations.
What is the normal range for Ammonia?
The standard teaching reference range for Ammonia is 15-45 µg/dL in conventional units, or 11-32 µmol/L in SI units. This value is measured in plasma (on ice).
| Specimen | Plasma (on ice) |
|---|---|
| Conventional range | 15-45 µg/dL |
| SI range | 11-32 µmol/L |
| Panel | Liver Function (LFTs) |
Full details, including nursing considerations, on the Ammonia normal range page. Reference ranges vary by laboratory, method, age, sex, and population - always use the range printed on the actual result.
Same panel