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.
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
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 Code | 003343 | |||||
Order Code Name | Copper, Urine | |||||
Order Loinc | 5632-5 | |||||
Result Code | 133439 | |||||
Result Code Name | Copper, Urine | |||||
UofM | ug/L | |||||
Result LOINC | 5632-5 | |||||
Order Code | 003343 | |||||
Order Code Name | Copper, Urine | |||||
Order Loinc | 5632-5 | |||||
Result Code | 723280 | |||||
Result Code Name | Creatinine(Crt),U | |||||
UofM | g/L | |||||
Result LOINC | 2161-8 | |||||
Order Code | 003343 | |||||
Order Code Name | Copper, Urine | |||||
Order Loinc | 5632-5 | |||||
Result Code | 133448 | |||||
Result Code Name | Copper/Crt Ratio | |||||
UofM | ug/g creat | |||||
Result LOINC | 13829-7 | |||||
Order Code | 003343 | |||||
Order Code Name | Copper, Urine | |||||
Order Loinc | 5632-5 | |||||
Result Code | 133447 | |||||
Result Code Name | Copper,Urine 24 Hr | |||||
UofM | ug/24 hr | |||||
Result LOINC | 5633-3 |