In patients with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV), high levels of baseline blood urea nitrogen (BUN) are a risk factor for end-stage kidney disease (ESKD) and/or ...

When this happens, waste products stay in the body. This buildup of blood urea nitrogen (BUN) and creatinine in the blood is called azotemia.

Normal Lab Values: Men: .7-1.3, Women: .6-1.1 mg/dl. The ratio of BUN to creatinine should be between 10:1 and 20:1. This test is a blood test that looks at how much creatinine is in the bloodstream.

Although elevated levels of urea and creatinine define the progression and severity of AKI, their accumulation parallels that of less well-characterized metabolites that mediate the toxic effects ...

The ratio of urine to serum creatinine averaged 4.9. Urea clearance ranged from 73.2 to 85.2 ml. per minute and equaled 77.8 to 96.2 per cent of creatinine chromagen clearance.

A significantly higher proportion of patients in the highest quartile of the BUN to creatinine ratio died (70.5%) compared with patients in quartiles 1 through 3 (60.9%, 59.3%, 62.5%, respectively ...

Elevated BUN can be precipitated by protein intake, total parenteral nutrition, steroids, fever, dehydration, and gastrointestinal bleeding. [7] The normal ratio of BUN to creatinine is 10:1.

If BUN results come back higher or lower than usual, a healthcare professional will usually follow up with other tests. A serum creatinine test combined with the BUN level can help highlight ...