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Test Code PBRCR Lead/Creatinine Ratio, Random, Urine


Specimen Required


Patient Preparation: High concentrations of gadolinium and iodine are known to interfere with most metals 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, 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.


Useful For

Detecting clinically significant lead exposure, a toxic heavy metal, in random urine specimens

Profile Information

Test ID Reporting Name Available Separately Always Performed
PBRC Lead/Creatinine Ratio, U No Yes
CDCR Creatinine Conc No Yes

Method Name

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

CDCR: Enzymatic Colorimetric Assay

Reporting Name

Lead/Creat Ratio, Random, U

Specimen Type

Urine

Specimen Minimum Volume

1.5 mL

Specimen Stability Information

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

Reject Due To

Hemolysis

NA

Lipemia

NA

Icterus

NA

Other

NA

Reference Values

0-17 years: not established

≥18 years: <2 mcg/g creatinine

Day(s) and Time(s) Performed

Monday through Saturday; 7 p.m.

Analytic Time

1 day

Specimen Retention Time

14 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

See Individual Test IDs

CPT Code Information

83655

82570

LOINC Code Information

Test ID Test Order Name Order LOINC Value
PBRCR Lead/Creat Ratio, Random, U 13466-8

 

Result ID Test Result Name Result LOINC Value
CDCR Creatinine Conc 2161-8
48548 Lead/Creatinine Ratio, U 13466-8