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Urea Nitrogen, Blood

Urea Nitrogen, Blood is a topic covered in the Davis's Lab & Diagnostic Tests.

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General

Synonym/Acronym:
BUN.

Common Use:
To assist in assessing for kidney function toward diagnosing disorders such as kidney disease and dehydration. Also used in monitoring the effectiveness of therapeutic interventions such as hemodialysis.

Specimen:
Serum collected in a gold-, red-, or red/gray-top tube. Plasma collected in a green-top (heparin) tube is also acceptable.

Normal Findings:
(Method: Spectrophotometry)

AgeConventional UnitsSI Units (Conventional Units × 0.357)
Newborn–3 yr5–17 mg/dL1.8–6.1 mmol/L
4–13 yr7–17 mg/dL2.5–6.1 mmol/L
14 yr–adult8–21 mg/dL2.9–7.5 mmol/L
Adult older than 90 yr10–31 mg/dL3.6–11.1 mmol/L

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Citation

Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Urea Nitrogen, Blood." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425302/all/Urea_Nitrogen__Blood.
Bladh ML, Van Leeuwen AM. Urea Nitrogen, Blood. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425302/all/Urea_Nitrogen__Blood. Accessed April 26, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Urea Nitrogen, Blood. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425302/all/Urea_Nitrogen__Blood
Bladh ML, Van Leeuwen AM. Urea Nitrogen, Blood [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 April 26]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425302/all/Urea_Nitrogen__Blood.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Urea Nitrogen, Blood ID - 425302 A1 - Bladh,Mickey Lynn, AU - Van Leeuwen,Anne M, BT - Davis's Laboratory & Diagnostic Tests UR - https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425302/all/Urea_Nitrogen__Blood PB - F.A. Davis Company ET - 7 DB - Nursing Central DP - Unbound Medicine ER -