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Multiple Choice

Which change is commonly observed in renal failure?

In renal failure, waste products that the kidneys normally remove build up in the blood. Urea is a nitrogen-containing waste from protein metabolism that is normally cleared by the kidneys. When the glomerular filtration rate drops, urea clearance decreases, so blood urea nitrogen increases. So, an elevated urea level is a common and expected finding in renal failure. The exact level can vary with protein intake and hydration, but the overall trend is a rise.

In renal failure, waste products that the kidneys normally remove build up in the blood. Urea is a nitrogen-containing waste from protein metabolism that is normally cleared by the kidneys. When the glomerular filtration rate drops, urea clearance decreases, so blood urea nitrogen increases. So, an elevated urea level is a common and expected finding in renal failure. The exact level can vary with protein intake and hydration, but the overall trend is a rise.