Quantitative Inductively Coupled Plasma-Mass Spectrometry
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.
24-hour or random urine collection. Specimen must be collected in a plastic container. ARUP studies indicate that refrigeration of urine alone, during and after collection, preserves specimens adequately, if tested within 14 days of collection.
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)
Refrigerated. Also acceptable: Room temperature or frozen.
Urine collected within 72 hours after administration of iodinated or gadolinium-based contrast media. Acid preserved urine. Specimens contaminated with blood or fecal material. Specimens transported in non-trace element free transport tube (with the exception of the original device).
Trace Elements requisition form may be required (ARUP form #32990-Barcode; #32991-No Barcode). Record total volume and collection time interval on transport tube and on test request form.
Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 1 year
Effective November 12,2018
|Lead, Urine - per 24h||0.0-8.1 µg/d|
|Lead, Urine - per volume||0.0-5.0 µg/L|
|Lead Urine-ratio to CRT||0.0-5.0 ug/gCRT|
|Creatinine, Urine - per 24h||
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.
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|0020207||Creatinine, Urine - per volume||2161-8|
|0020208||Creatinine, Urine - per 24h||2162-6|
|0025061||Lead, Urine - per 24h||5677-0|
|0025062||Lead, Urine - per volume||5676-2|
|0025065||Lead, Urine - ratio to CRT||13466-8|
- Lead/Creatinine Ratio, Random, Urine
- Normalized Urine Lead
- Pb urine
- urine lead concentration