Urea Nitrogen and Creatinine Profile, 24-Hour Urine

CPT: 82570; 84540
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Test Details

Synonyms

  • Creatinine and Urea, 24-Hour Urine
  • Urine Creatinine
  • Urine Urea Nitrogen

Test Includes

Creatinine, 24-hour urine; creatinine, urine; eGFR calculation; urea nitrogen, 24-hour urine; urea nitrogen, urine

Use

Renal function test

Specimen Requirements

Specimen

Urine (24-hour)

Volume

10 mL aliquot of entire collection

Minimum Volume

1 mL aliquot

Container

Plastic urine container, no preservative

Collection

Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine, including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the following morning). Fasten the lid securely. The container must be labeled with the patient's full name, the date and time the collection began, and the date and time collection ended.

Storage Instructions

Room temperature

Stability Requirements

Temperature

Period

Room temperature

7 days

Refrigerated

14 days

Frozen

14 days

Freeze/thaw cycles

Stable x3

Clinical Information

Special Instructions

State total 24-hour urine volume on the request form.

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
317222 UREA and Creatinine, 24-Hr Ur 013672 Creatinine, Urine mg/dL 2161-8
317222 UREA and Creatinine, 24-Hr Ur 013227 Creatinine, Ur 24hr mg/24 hr 2162-6
317222 UREA and Creatinine, 24-Hr Ur 013508 Urea Nitrogen, U mg/dL 12967-6
317222 UREA and Creatinine, 24-Hr Ur 013236 Urea Nitrogen, 24hr g/24 hr 3096-5

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The LOINC® codes are copyright © 1994-2017, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf