This test measures the amount of nitrogen in the blood derived from protein breakdown.
Diagnostic Value: Elevated BUN can signal kidney dysfunction, dehydration, or high protein metabolism; low levels may reflect liver disease or malnutrition.
Clinical Significance: BUN testing helps differentiate between renal and non-renal causes of elevated nitrogen waste in the bloodstream.
Symptom Correlation: Patients may experience nausea, confusion, or swelling associated with decreased kidney clearance.
Because it reflects both metabolic and renal efficiency, BUN testing is a key tool in assessing kidney and overall systemic health.