Lead, Urine 24 Hour Quantitative
Test Mnemonic
ULEADQ
CPT Codes
- 83655 - QTY (1)
Includes
- Hours Collected
- Total Volume
- Creatinine, Urine - per volume
- Creatinine, Urine - per 24h
- Lead, Urine - per volume
- Lead, Urine - per 24h
- Lead, Urine - ratio to CRT
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 8 mL | Urine, 24-hour (well-mixed) | Plastic container | Refrigerate during collection. | Refrigerated | HEAVY METALS FORM REQUIRED to meet State Health Department requirements. Patient Prep: High concentrations of iodine may interfere with testing. Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, non-essential over-the-counter medications (upon the advice of their physician) and avoid seafood for 48 hours. Avoid iodinated or gadolinium-based contrast media for at least 72 hours or 14 days for patients with impaired kidney function. Collection: Collect in a plastic container, mix well and aliquot into a trace metal free transport tube (ARUP #43116). Record total volume and collection time interval on specimen. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 8 mL | Urine, random | Plastic container | N/A | Refrigerated | HEAVY METALS FORM REQUIRED to meet State Health Department requirements. Patient Prep: High concentrations of iodine may interfere with testing. Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, non-essential over-the-counter medications (upon the advice of their physician) and avoid seafood for 48 hours. Avoid iodinated or gadolinium-based contrast media for at least 72 hours or 14 days for patients with impaired kidney function. Collection: Collect in a plastic container, mix well and aliquot into a trace metal free transport tube (ARUP #43116). Record total volume and collection time interval on specimen. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 1 week |
| Refrigerated | 2 weeks |
| Frozen | 1 year |
Days Performed
Sun - Sat
Turnaround Time
2 - 6 days
Methodology
| Name | Description |
|---|---|
| Inductively Coupled Plasma / Mass Spectrometry (ICP-MS) |
Special Info
HEAVY METALS FORM REQUIRED to meet State Health Department requirements. Patient Prep: Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, nonessential over-the-counter medications (upon the advice of their physician) and avoid seafood for 48 hours. High concentrations of iodine may interfere with testing. Avoid iodinated or gadolinium-based contrast media for at least 72 hours or 14 days for patients with impaired kidney function. Collection: Collect in a plastic container, mix well and aliquot into a trace metal free transport tube (ARUP #43116). Record total volume and collection time interval on specimen. Urine transported in a non-trace element-free tube or contaminated with iodine, gadolinium, blood, fecal material or acid preservative will be rejected. Elevated results may be due to skin or collection-related contamination, including the use of collection containers that are not certified to be trace element-free. Confirmation with a second specimen collected in a certified trace-element free container is recommended if an elevated result is suspected to be due to contamination. This test is New York DOH approved.
Clinical Info
This test may be useful in the assessment of chronic lead exposure or in monitoring chelation therapy. Quantification of urine excretion rates before or after chelation therapy has been used as an indicator of lead exposure. Urinary excretion of >125 mg of lead per 24 hours is usually associated with related evidence of lead toxicity.