What BUN level indicates a normal range in renal function testing?

What BUN level indicates a normal range in renal function testing?

• A. 10 mg/dL
• B. 18 mg/dL
• C. 25 mg/dL
• D. 35 mg/dL

Answer: (B)

A BUN level of 18 mg/dL is within the normal range for renal function testing. Blood urea nitrogen (BUN) is a waste product formed in the liver from the breakdown of protein and is typically measured in the blood to assess kidney function. Normal BUN levels generally range from about 7 to 20 mg/dL, which means that a level of 18 mg/dL indicates normal renal function, reflecting the kidneys' ability to filter and excrete urea efficiently. Levels below this range may suggest decreased protein intake, liver problems, or overhydration, while higher levels could indicate potential kidney dysfunction or dehydration. Levels such as 10 mg/dL may be on the lower end of normal but are still acceptable, whereas 25 mg/dL and 35 mg/dL suggest possible issues with renal function or dehydration and are therefore outside of the normal range.

A BUN level of 18 mg/dL is within the normal range for renal function testing. Blood urea nitrogen (BUN) is a waste product formed in the liver from the breakdown of protein and is typically measured in the blood to assess kidney function. Normal BUN levels generally range from about 7 to 20 mg/dL, which means that a level of 18 mg/dL indicates normal renal function, reflecting the kidneys' ability to filter and excrete urea efficiently.

Levels below this range may suggest decreased protein intake, liver problems, or overhydration, while higher levels could indicate potential kidney dysfunction or dehydration. Levels such as 10 mg/dL may be on the lower end of normal but are still acceptable, whereas 25 mg/dL and 35 mg/dL suggest possible issues with renal function or dehydration and are therefore outside of the normal range.