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Test ID CRCRU Chromium/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 container with no metal cap or glued insert

Submission Container/Tube: Plastic vial 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.


Reporting Name

Chromium/Creat Ratio, Random, U

Specimen Type

Urine

Specimen Stability Information

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

Report Available

2 to 8 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CRCRU Chromium/Creat Ratio, Random, U 13464-3

 

Result ID Test Result Name Result LOINC Value
CRETR Creatinine, Random, U 2161-8
607759 Chromium/Creat Ratio, U 13464-3

Useful For

Detecting chromium exposure

Day(s) Performed

Monday

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

82495

82570

Specimen Minimum Volume

2 mL

Reference Values

CHROMIUM/CREATININE RATIO

0-17 years: Not established

>17 years: <0.8 mcg/g Creatinine

 

CREATININE, RANDOM

≥18 years old: 16-326 mg/dL

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

Method Name

CRCRR: Triple-Quadrupole Inductively Coupled Plasma Mass Spectrometry (ICP-MS/MS)

CRETR: Enzymatic Colorimetric Assay

Profile Information

Test ID Reporting Name Available Separately Always Performed
CRCRR Chromium/Creat Ratio, U No Yes
CRETR Creatinine, Random, U No Yes