Description
Why It’s Done
The Porphobilinogen Urine Screening Test is usually performed to:
• Diagnose porphyria: If porphyria is suspected, especially acute intermittent porphyria (AIP), which can cause episodes of severe abdominal pain, vomiting, and neurological symptoms. Elevated levels of porphobilinogen in the urine are a key marker of this condition.
• Screen for acute porphyrias: The test is used when someone has a family history of porphyria or is presenting with symptoms like abdominal pain, psychiatric disturbances, or neurological symptoms, which could be indicative of a porphyric attack.
• Monitor disease activity: For individuals with known porphyria, especially AIP, this test can help monitor disease activity and track the occurrence of episodes.
• Investigate unexplained abdominal pain: When a patient presents with recurrent abdominal pain and other systemic symptoms, and other causes have been ruled out, the PBG test may help in diagnosing porphyria.
Preparation
• Dietary considerations: You may be asked to avoid certain foods and drinks, such as alcohol or fasting, as they can trigger or exacerbate porphyric symptoms and affect the test results.
• Medications: Inform your doctor about any medications you are taking, as certain drugs, especially barbiturates, anti-seizure medications, sedatives, and antibiotics, can trigger porphyric attacks or interfere with the results of the test.
• Sample collection: The test involves collecting a urine sample, typically a 24-hour urine specimen, to assess the porphobilinogen levels. The collection should be done carefully to ensure accurate results.
• Hydration: Stay well-hydrated before the test, as dehydration can affect the concentration of substances in the urine and potentially influence the test results
