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Copper, Urine

CPT 82525; 82570
Synonyms
  • Cu, Urine

Test Details

Methodology

Inductively-coupled plasma/mass spectrometry (ICP/MS)

Result Turnaround Time

2 - 4 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Documents

Test Includes

Copper, urine; creatinine, urine; copper:creatinine ratio; copper, urine (24-hour)

Use

Monitor exposure to copper

Special Instructions

Request form must state 24-hour collection volume, if applicable. Do not use preservative. Preservatives used for routine analysis may contain mercuric oxide (ie, Stabilur), which interferes with all metal testing. If both urinalysis and metal testing are ordered, please submit a separate urine specimen (containing no additive) for the metal testing.

Limitations

Increased urinary copper excretion may occur in ICC or with chronic active hepatitis; Wilson's disease and chronic active hepatitis may also resemble one another; thus, parameters in addition to urinary copper excretion, such as ceruloplasmin and serum copper, are needed.

This test was developed and its performance characteristics determined by LabCorp. It has not been cleared or approved by the Food and Drug Administration.

Footnotes

1. Lauwerys RR, Hoet P, Industrial Chemical Exposure: Guidelines for Biological Monitoring, 2nd ed, Boca Raton, FL: Lewis Publishers, 1993, 291.
2. Jacobs DS, DeMott WR, Oxley DK, et al, Laboratory Test Handbook With Key Word Index, 5th ed, Hudson, OH: Lexi-Comp Inc, 2001.

Custom Additional Information

Copper poisoning through chronic inhalation of copper fumes and/or dusts that are typically associated with industry may produce symptoms of nausea, vomiting, nervous manifestations, and hepatomegaly. Acute exposures through inhalation can cause typical metal-fume fever, chills, upper respiratory irritation, and aching muscles. Elevated urine copper levels may also occur with biliary cirrhosis, chronic active hepatitis, or Wilson disease.2 Copper poisoning through chronic exposure is rare in the general population, excepting individuals with Wilson's disease. Overexposure to copper is generally associated with industry through the inhalation of copper dust and/or fumes that arise in operations involving copper (eg, metallurgy, copper plating, soldering). Acute ingestion is a viable concern for the general population and can be precipitated by food contamination from copper utensils or the accidental or intentional ingestion of copper salts.

Specimen Requirements

Specimen

Urine (random or 24-hour)

Volume

5 mL

Minimum Volume

1.3 mL (Note: This volume does not allow for repeat testing.)

Container

Plastic urine container, no preservative

Collection Instructions

Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning). Screw the lid on securely.

Stability Requirements

Temperature

Period

Room temperature

14 days

Refrigerated

14 days

Frozen

14 days

Freeze/thaw cycles

Stable x3

Reference Range

Environmental exposure: 3−35 μg/24 hours; <50 μg/g creatinine1

Storage Instructions

Maintain specimen at room temperature.

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
003343 Copper, Urine 5632-5 133439 Copper, Urine ug/L 5632-5
003343 Copper, Urine 5632-5 723280 Creatinine(Crt),U g/L 2161-8
003343 Copper, Urine 5632-5 133448 Copper/Crt Ratio ug/g creat 13829-7
003343 Copper, Urine 5632-5 133447 Copper,Urine 24 Hr ug/24 hr 5633-3
Order Code003343
Order Code NameCopper, Urine
Order Loinc5632-5
Result Code133439
Result Code NameCopper, Urine
UofMug/L
Result LOINC5632-5
Order Code003343
Order Code NameCopper, Urine
Order Loinc5632-5
Result Code723280
Result Code NameCreatinine(Crt),U
UofMg/L
Result LOINC2161-8
Order Code003343
Order Code NameCopper, Urine
Order Loinc5632-5
Result Code133448
Result Code NameCopper/Crt Ratio
UofMug/g creat
Result LOINC13829-7
Order Code003343
Order Code NameCopper, Urine
Order Loinc5632-5
Result Code133447
Result Code NameCopper,Urine 24 Hr
UofMug/24 hr
Result LOINC5633-3