Ammonia
The Ammonia test measures the level of ammonia in your blood. Clinicians order this test primarily to assess liver function, as the liver is responsible for converting ammonia into urea, which is then eliminated from the body. It is typically used in clinical situations where there is a suspicion of liver disease, metabolic disorders, or severe infections that may disrupt ammonia metabolism. The Ammonia test can help diagnose conditions such as hepatic encephalopathy, a serious complication arising from liver failure, and monitor patients undergoing treatment for liver diseases.
Test Essentials
Specimen Required
2 mL blood. Preferred: Lavender (EDTA). No microtainers.
Test Category
Chemistry
Turnaround Time
Results from the Ammonia test are typically available within 24–48 hours after sample collection.
Clinical Information
Clinical Significance
Abnormal results from the Ammonia test can indicate high or low levels of ammonia in the blood. Elevated ammonia levels may suggest liver dysfunction, urea cycle disorders, or severe infections, while low levels are less common and may not be clinically significant. The Ammonia test is valuable for diagnosing and managing conditions related to ammonia metabolism, but only a healthcare provider can interpret these results accurately in the context of your health.
Reference Ranges
Reference ranges for ammonia levels can vary depending on the laboratory methods used, as well as factors like age and sex. Generally, normal ammonia levels are considered to be low in healthy individuals. It is important to interpret results in the context of your overall health and medical history, so consult your healthcare provider for detailed information.
Sample Preparation
Before your Ammonia test, it is generally recommended that you do not eat or drink anything for at least 8 hours, as fasting helps ensure accurate results. Additionally, inform your healthcare provider about any medications you are taking, as some may need to be adjusted prior to the test. If there are no specific instructions regarding fasting or medication adjustments, you will be informed before the test.
Related Tests
Code: 0212
Code: 0230
Code: P0204
Frequently Asked Questions
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