Last Modified:
12/30/2020 12:20:26 PM
Patient Preparation:
Whenever possible, the specimen should be collected during an acute episode because porphobilinogen (PBG) may decrease rapidly upon remission. PBG may also degrade when samples are exposed to UV light for extended periods, or are transported at ambient temperature. If an amber collection jug/urine cup is not available, the sample must be protected from light by completely wrapping the container in aluminum foil. PBG is most stable at pH 6-7, but all samples may be sent with or without preservative. All results should be interpreted in the context of clinical findings, relevant history, and other laboratory data.
Specimen Requirements:
2.0 mL aliquot from a well mixed random Urine Collection from CCMS Collection Kit
Collection Instructions:
Do not use preservatives.
Urine should be refrigerated and protected from light during collection as long as in amber 24 hr jug is in the dark
For CCMS Collection instructions see Addendum D
For CCMS Spanish patient collection instruction sheet see Addendum D
For CCMS Burmese patient collection instruction sheet see Addendum D
For CCMS Arabic patient collection instruction sheet see Addendum D
Minimum Volume:
1.0 mL Urine
Transport & Storage: Temperature/Stability:
7 days Refrigerated
30 days Frozen
Store and ship at dry ice temperature.
Rejection Criteria:
Ambient; Not Protected from Light
Reference Range:
| Pediatric |
<0.36 mg/g creat |
| Adult |
<0.22 mg/g creat |
Methodology:
Chromatography/Mass Spectrometry
Documentation:
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes
Custom Panel:
No
PRODUCTION SCHEDULE
Turn Around Time:
3 to 6 days
Days Performed:
Tuesday, Thursday, Saturday
Sites Performed:
Quest - Chantilly to San Juan Capistrano
PHL Test Code:
MSOT
EPIC Test Code:
MISC
Send Out Test Code:
6329
Alternate Test Names:
PBG; Porphobilinogen, Quantitative, Random Urine
CPT Coding:
84110
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