Blood urea nitrogen; urine clearance; urine urea nitrogen
Must be a timed collection.
Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Serum and urine (24-hour)
1 mL serum and 10 mL urine aliquot
0.5 mL serum and 1 mL urine aliquot (Note: This volume does not allow for repeat testing.)
Gel-barrier tube or transport tube and plastic urine container
Serum must be drawn during urine collection. Separate serum from cells within 45 minutes of collection.
Maintain specimen at room temperature.
Renal function test
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|002329||Urea Nitrogen Clearance||81232-1||001040||BUN||mg/dL||3094-0|
|002329||Urea Nitrogen Clearance||81232-1||135301||Urea Clearance||mL/min||3098-1|
|002329||Urea Nitrogen Clearance||81232-1||013508||Urea Nitrogen, U||mg/dL||12967-6|
|002329||Urea Nitrogen Clearance||81232-1||013236||Urea Nitrogen, 24hr||g/24 hr||3096-5|
© 2021 Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.
The LOINC® codes are copyright © 1994-2021, 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