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Lead, 24-Hour Urine
Test Code36440
CPT Codes
83655
Includes
CPT code 81050 may be added at an additional charge for volume measurement
Preferred Specimen
7 mL of a well-mixed 24-hour urine collected in a plastic acid-washed metal-free, leak-roof container
Minimum Volume
3 mL
Instructions
Avoid worksite collection.
Test performed on a specimen submitted in a nontrace element tube/container (not acid-washed) may not accurately reflect the patient's level. If a nontrace element tube/container is received, it will be accepted for testing; however, elevated results are reported with a message that resubmission with a trace element tube/container is recommended.
Test performed on a specimen submitted in a nontrace element tube/container (not acid-washed) may not accurately reflect the patient's level. If a nontrace element tube/container is received, it will be accepted for testing; however, elevated results are reported with a message that resubmission with a trace element tube/container is recommended.
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 48 hours
Refrigerated: 5 days
Frozen: 14 days
Refrigerated: 5 days
Frozen: 14 days
Methodology
Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Set up: Mon-Sat p.m.; Report available: 1 day
Reference Range
<80 mcg/L
Clinical Significance
Elevated urinary lead concentration is indicative of chronic lead toxicity. Urinary lead concentrations may be used to monitor detoxification therapy.
Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153