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HelpTest Code lab1231957 Porphobilinogen, Quantitative, Random, Urine
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Reporting Name
Porphobilinogen, QN, Random, USpecimen Type
UrineShipping Instructions
Ship specimen protected from light.
Necessary Information
Include a list of medications the patient is currently taking.
Specimen Required
Patient Preparation: Patient must not consume any alcohol for at least 24 hours prior to collection.
Supplies: Urine Container-Amber, 60 mL (T596)
Specimen Volume: 20 mL
Collection Instructions:
1. Collect a random urine specimen.
2. No preservative necessary but pH must be above 5.0.
3. Specimens should be protected from light and frozen immediately following collection.
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Frozen (preferred) | 7 days | LIGHT PROTECTED |
| Refrigerated | 7 days | LIGHT PROTECTED |
Specimen Minimum Volume
15 mL
Special Instructions
Day(s) Performed
Monday through Friday
Specimen Retention Time
1 weekReport Available
2 to 4 daysReference Values
≤1.3 mcmol/L
Useful For
First-order test for evaluating a suspected acute porphyria: acute intermittent porphyria, hereditary coproporphyria, and variegate porphyria
Testing Algorithm
For more information see:
-The Heme Biosynthetic Pathway
CPT Code Information
84110
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| PBGU | Porphobilinogen, QN, Random, U | 2811-8 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 29365 | Porphobilinogen, U | 2811-8 |
| 29366 | Interpretation (PBGU) | 59462-2 |
| 35032 | Reviewed By | 18771-6 |
Disease States
- Porphyria
Forms
If not ordering electronically, complete, print, and send a Biochemical Genetics Test Request (T798) with the specimen.