Blood Urea Nitrogen

The urea concentration of the blood stated in terms of nitrogen content. Serum (plasma) urea nitrogen is approximately 12% higher than blood urea nitrogen concentration because of the greater protein content of red blood cells. Increases in blood or serum urea nitrogen are referred to as azotemia and may have prerenal, renal, or postrenal causes. (From Saunders Dictionary and Encyclopedia of Laboratory Medicine and Technology, 1984)

Year introduced: 1967(1964)

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Tree Number(s): E01.370.225.124.100.115, E01.370.390.400.100, E05.200.124.100.115

MeSH Unique ID: D001806

Entry Terms:

• Nitrogen, Blood Urea
• Urea Nitrogen, Blood
• BUN

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Analytical, Diagnostic and Therapeutic Techniques and Equipment Category
Diagnosis
Diagnostic Techniques and Procedures
Clinical Laboratory Techniques
Clinical Chemistry Tests
Blood Chemical Analysis
Blood Urea Nitrogen

All MeSH Categories
Analytical, Diagnostic and Therapeutic Techniques and Equipment Category
Diagnosis
Diagnostic Techniques and Procedures
Diagnostic Techniques, Urological
Kidney Function Tests
Blood Urea Nitrogen

All MeSH Categories
Analytical, Diagnostic and Therapeutic Techniques and Equipment Category
Investigative Techniques
Clinical Laboratory Techniques
Clinical Chemistry Tests
Blood Chemical Analysis
Blood Urea Nitrogen