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Test Code GDCRU Gadolinium/Creatinine Ratio, Random, Urine

Reporting Name

Gadolinium/Creat Ratio, Random, U

Useful For

An aid in documenting past exposure to gadolinium-containing chelates and to monitor the effectiveness of dialysis

Profile Information

Test ID Reporting Name Available Separately Always Performed
GDCR Gadolinium/Creat Ratio, U No Yes
CDCR Creatinine Conc No Yes

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Urine

Specimen Required

Supplies: Urine Tubes, 10 mL (T068)

Collection Container/Tube: Clean, plastic urine collection container

Submission Container/Tube: Plastic, 10-mL urine tube (T068) 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 Trace Metals Analysis Specimen Collection and Transport in Special Instructions for complete instructions.

Specimen Minimum Volume

0.7 mL

Specimen Stability Information

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

Reference Values

0-17 years: not established

≥18 years: <0.8 mcg/g creatinine

Day(s) and Time(s) Performed

Wednesday; 8 a.m.

Test Classification

See Individual Test IDs

CPT Code Information

83018 Gadolinium Concentration

82570 Creatinine Concentration

LOINC Code Information

Test ID Test Order Name Order LOINC Value
GDCRU Gadolinium/Creat Ratio, Random, U In Process

 

Result ID Test Result Name Result LOINC Value
CDCR Creatinine Conc 2161-8
32873 Gadolinium/Creat Ratio, U Unable to Verify

Method Name

GDCR: Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)

CDCR: Enzymatic Colorimetric Assay