Porphobilinogen, Urine Quant
Test Mnemonic
UPBGQT
CPT Codes
- 84110 - QTY (1)
Aliases
- PBG, Urine
Includes
- Porphobilinogen
- Creatinine
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 8 mL | Urine, 24-hour (well-mixed) | Clean container | Refrigerate during collection. | Frozen | Protect from light. Transfer aliquot to amber transport tube and record total volume and collection time interval on specimen and requisition. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 8 mL | Urine, random | Clean container | Frozen | Protect from light. Transfer aliquot to amber transport tube. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 3.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | Unacceptable |
| Refrigerated | 4 days |
| Frozen | 1 month |
Days Performed
Mon - Fri
Turnaround Time
2 - 5 days
Methodology
| Name | Description |
|---|---|
| Ion Exchange Chromatography/Spectrometry (IECS) |
Reference Range
| Porphobilinogen | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Normal | 24 hr collection: 0.0 - 11.0 | umol/d | Normal | Random collection: 0.0 - 8.8 | umol/L |
Special Info
Protect from light. Record total volume and collection time interval on amber transport tube. Body fluids other than urine are unacceptable. This test is New York DOH approved.
Clinical Info
This test is useful in determining metabolic response to IV hematin, and to rule out acute intermittent porphyria (AIP) and other acute attack types of porphyrias associated with neurologic and/or psychiatric symptoms. If testing for an acute porphyria, please consider ordering PBG, Screen (SQUPBG). If testing for a cutaneous porphyria, please consider ordering Porphyrins, Urine (SQUPORFR). If testing for erythropoietic porphyria, please consider ordering Total Erythrocyte Porphyrins (SQPROPOR).