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Test ID COBRU Cobalt/Creatinine Ratio, Random, Urine


Ordering Guidance


 



Specimen Required


Patient Preparation: High concentrations of gadolinium and iodine are known to potentially interfere with most inductively coupled plasma mass spectrometry-based metal tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.

Supplies: Urine Tubes, 10 mL (T068)

Collection Container/Tube: Clean, plastic urine collection container

Submission Container/Tube: Plastic, 10-mL urine tube or clean, plastic aliquot container with no metal cap or glued insert

Specimen Volume: 3 mL

Collection Instructions:

1. Collect a random urine specimen.

2. See Metals Analysis Specimen Collection and Transport for complete instructions.


Secondary ID

607760

Useful For

Detecting cobalt exposure in a random urine collection

 

Monitoring metallic prosthetic implant wear

 

This test is not useful for assessment of vitamin B12 activity.

Specimen Type

Urine

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  14 days

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Reference Values

COBALT:

0-17 years: Not established

>17 years: <1.7 mcg/g Cr

 

CREATININE:

≥18 years old: 16-326 mg/dL

Reference values have not been established for patients who are younger than 18 years.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

83018

82570

Day(s) Performed

Monday

Report Available

2 to 8 days