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Order Code CRETR Creatinine, Random, Urine (Non-Orderable)


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.


Useful For

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

 

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.

 

Colorimetric

Reporting Name

Creatinine, Random, U

Specimen Type

Urine

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time
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.

Method Description

This enzymatic method is based on the conversion of creatinine with the aid of creatininase, creatinase, and sarcosine oxidase to form glycine, formaldehyde, and hydrogen peroxide. Catalyzed by peroxidase the liberated hydrogen peroxide reacts with 4-aminophenazone and HTIB (2,4,6-triiodo03-hydroxybenzoic acid) to form a quinone imine chromogen. The color intensity of the quinone imine chromogen formed is directly proportional to the creatinine concentration in the reaction mixture.(Package insert: Creatinine plus ver.2. Roche Diagnostics; 07/2024)

Performing Laboratory

Mayo Clinic Laboratories in Rochester

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

Day(s) Performed

Monday through Sunday