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Test Code CRETR Creatinine, Random, Urine

Reporting Name

Creatinine, Random, U

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Normalization of urinary analytes to account for the variation in urinary concentrations between individuals when using random urine collections

Method Name

Only orderable as part of a profile. For more information see orderable test ID.

Enzymatic Colorimetric Assay


Specimen Required


Only orderable as part of a profile. For more information see orderable test ID.

 

Supplies: Sarstedt 5 mL Aliquot Tube (T914)

Container/Tube: Plastic, 5-mL tube

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.


Specimen Type

Urine

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 30 days
  Frozen  30 days
  Ambient  14 days

Reject Due To

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

Reference Values

Only orderable as part of a profile. For more information see orderable test ID.

 

≥18 years old: 16-326 mg/dL

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

Interpretation

Decreased creatinine clearance indicates decreased glomerular filtration rate. This can be due to conditions such as progressive renal disease, or result from adverse effect on renal hemodynamics that are often reversible including certain drugs or from decreases in effective renal perfusion (eg, volume depletion or heart failure).

 

Increased creatinine clearance is often referred to as "hyperfiltration" and is most commonly seen during pregnancy or in patients with diabetes mellitus, before diabetic nephropathy has occurred. It also may occur with large dietary protein intake.

Day(s) Performed

Monday through Sunday

Report Available

1 day

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

82570

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CRETR Creatinine, Random, U 2161-8

 

Result ID Test Result Name Result LOINC Value
CRETR Creatinine, Random, U 2161-8