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Lead, Random Urine

U LEADRAND
Example Reports
High
Normal

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Specimen Collection and Handling

Ordering Recommendation

May be useful in the assessment of chronic lead exposure or in monitoring chelation therapy. For routine testing of lead exposure, Lead, Blood (Venous) (0020098) is preferred. For occupational exposure, consider Lead, Industrial Exposure Panel, Adults (0025016).

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, and non-essential over-the-counter medications (upon the advice of their physician). High concentrations of iodine may interfere with elemental testing. Collection of urine specimens from patients receiving iodinated or gadolinium-based contrast media should be avoided for a minimum of 72 hours post-exposure. Collection from patients with impaired kidney function should be avoided for a minimum of 14 days post-contrast media exposure.

Collect

Random urine.

Specimen Preparation

Transfer an 8 mL aliquot from a well-mixed collection to ARUP Trace Element-Free Transport Tubes (ARUP supply #43116), available online through eSupply using ARUP Connect or contact ARUP Client Services at (800) 522-2787. (Min: 1 mL)

Storage/Transport Temperature

Refrigerated. Also acceptable: Room temperature or frozen.

Unacceptable Conditions

Urine collected within 72 hours after administration of iodinated or gadolinium-based contrast media.

Remarks
Stability

Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 1 year

Methodology

Quantitative Inductively Coupled Plasma-Mass Spectrometry

Performed

Sun-Sat

Reported

1-5 days

Reference Interval

Effective November 12,2018

Components
 Reference Interval
Lead, Urine - per volume 0.0-5.0 µg/L
Lead, Urine - ratio to CRT 0.0-5.0 µg/gCRT

Interpretive Data

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.

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.

Compliance Category

Laboratory Developed Test (LDT)

Note

Hotline History

N/A

CPT Codes

83655

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Components

Component Test Code* Component Chart Name LOINC
0020207 Creatinine, Urine - per volume 2161-8
0025062 Lead, Urine - per volume 5676-2
0025065 Lead, Urine - ratio to CRT 13466-8
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Lead/Creatinine Ratio, Random, Urine
  • Normalized Urine Lead
  • Pb
  • Pb urine
  • urine lead concentration
Lead, Random Urine