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Test Code PBCU Lead/Creatinine Ratio, Urine (Non-Orderable)


Specimen Required


Only orderable as part of profile. For more information see:

PBUCR / Lead/Creatinine Ratio, Random, Urine

HMUCR / Heavy Metal/Creatinine Ratio, with Reflex, Random, Urine


Useful For

Only orderable as part of profile. For more information see:

PBUCR / Lead/Creatinine Ratio, Random, Urine

HMUCR / Heavy Metal/Creatinine Ratio, with Reflex, Random, Urine

 

Detecting clinically significant lead exposure using random urine specimens

 

This test is not a substitute for blood lead screening.

Method Name

Only orderable as part of profile. For more information see:

PBUCR / Lead/Creatinine Ratio, Random, Urine

HMUCR / Heavy Metal/Creatinine Ratio, with Reflex, Random, Urine

 

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

Reporting Name

Lead/Creatinine Ratio, 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

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

Clinical Information

An increased urine lead concentration relative to creatinine indicates significant lead exposure. Measurement of urine lead concentration relative to creatinine before and after chelation therapy have been used to assess lead exposure. A post-chelation lead concentration up to 6 times the pre-chelation concentration is considered normal.

 

Blood lead measurement is the preferred test for clinical correlation with toxicity. For more information, see PBDV / Lead, Venous, with Demographics, Blood.

Reference Values

Only orderable as part of profile. For more information see:

PBUCR / Lead/Creatinine Ratio, Random, Urine

HMUCR / Heavy Metal/Creatinine Ratio, with Reflex, Random, Urine

 

0-17 years: Not established

≥18 years: <2 mcg/g creatinine

Performing Laboratory

Mayo Clinic Laboratories in Rochester

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.

Day(s) Performed

Monday through Friday

Report Available

2 to 4 days

CPT Code Information

83655