Lab

Serum Ammonia

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Serum Ammonia, Plasma Ammonia, Blood Ammonia

  • Labs
  1. Normal: 10-80 ug/dl
  2. Send sample on ice and run without delay
  • Causes
  • Increased Serum Ammonia
  1. Hepatic failure
  2. Hepatic Encephalopathy
  3. Cirrhosis
  4. Reye's Syndrome
  5. Portacaval shunt
  6. Inborn Errors of Metabolism
    1. Urea Cycle Disorders
    2. Protein Metabolism Disorders (Organic acidemia)
  7. Medications
    1. Diuretics
    2. Polymixin B
    3. Methicillin
    4. Valproic Acid (Depakote)
      1. See Valproic Acid Toxicity (includes L-Carnitine protocol)
  • Causes
  • Decreased Serum Ammonia
  1. Renal Failure
  2. Medications
    1. Neomycin
    2. Lactulose
    3. Tetracycline