Sample: Serum 0.5 mL
Units: mg/dL Factor x 0.357 = mmol/L
Range: Up to 23 mg/dL
Remarks: BUN (Blood Urea Nitrogen) see Blood Urea High blood Urea levels are seen in glomerulonephritis, pyelonephritis and other causes of chronic renal disease; with acute renal failure and decreased renal perfusion. Borderline increased blood Urea levels may be found after recent ingestion of high protein meal and muscle wasting. Both blood Urea and serum Creatinine are used for monitoring patients on haemodialysis.