Azotemia is most consistently associated with which laboratory finding?

• A. Hyperglycemia
• B. Hyperkalemia
• C. Azotemia
• D. Anemia

Answer: (C)

Azotemia is the accumulation of nitrogenous waste in the blood due to reduced kidney filtration. It directly reflects a fall in glomerular filtration rate, so the most consistent lab finding is elevated BUN (blood urea nitrogen) and/or creatinine—the hallmark of renal dysfunction. Other options aren’t as reliably linked: high blood sugar isn’t a direct sign of impaired waste clearance; high potassium can occur with kidney failure but isn’t universally present with azotemia; anemia may develop in chronic kidney disease from decreased erythropoietin, but it isn’t the defining lab change of azotemia itself.