Porphobilinogen, 24 Hour Urine Quantitative
- A Urine Creatinine is included with this test.
- Please refer to the Specimen Collection Manual for instructions on 24 Hour Urine Collection:
Specimen Collection Criteria
Collect (preferred specimen): 24 hour urine sample with no preservative.
Also acceptable: Random urine specimen in a screw-capped container (preferred) or other sterile collection cup. (Minimum: 2.0 mL)
- Keep 24 hour urine specimen iced or refrigerated during collection.
- Include start and end dates and times for the collection period on the specimen container.
- All specimens must be protected from light.
Urine Preservative Options
6N Hydrochloric Acid
Boric Acid (10g)
50% Acetic Acid
Physician Office/Draw Specimen Preparation
Protect specimen from light. Maintain specimens refrigerated (2-8°C or 36-46°F) prior to transport.
Preparation for Courier Transport
Transport: Entire 24 hour urine collection, or random urine, refrigerated (2-8°C or 36-46°F).
- Specimens not collected and processed as indicated.
Protect specimen from light. Measure total volume of 24 hour urine specimen. Record total volume and collection start and end dates and times in the LIS system. Aliquot two 4.0 mL aliquots from the well-mixed 24 hour urine collection or random urine into amber transport tubes and freeze (-20°C/-4°F or below). (Minimum: 3.5 mL)
Specimen Stability for Testing:
Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): 4 days
Frozen (-20°C/-4°F or below): 30 days
Specimen Storage in Department Prior to Disposal:
Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions.
Sent to ARUP Laboratories, Salt Lake City, UT.
Monday – Friday.
Results available in 2-5 days.
Quantitative Ion Exchange Chromatography/Spectrophotometry.
This test is used to rule out acute intermittent porphyria (AIP) and other acute attack types of porphyrias associated with neurologic and/or psychiatric symptoms.
Send Out Laboratory – RO
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This directory currently reflects information only for specimens collected and/or processed at the
Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.