What is a common, easily correctable cause of prerenal azotemia?

What is a common, easily correctable cause of prerenal azotemia?

• A. Intrinsic Glomerulonephritis
• B. Postrenal Obstruction
• C. Acute Tubular Necrosis
• D. Hypoperfusion Easily Correctable

Answer: (D)

Prerenal azotemia is caused by reduced blood flow to the kidneys. The most common and easily correctable source of this is hypoperfusion from volume depletion or reduced effective circulating volume (for example, dehydration, GI losses, bleeding, or heart failure with low forward flow). When perfusion is restored by fluids or addressing the underlying hemodynamic issue, kidney function often returns to normal because the kidney tissue itself hasn’t been damaged yet. Intrinsic renal problems, like glomerulonephritis or acute tubular necrosis, involve damage within the kidney itself, so simply correcting perfusion doesn’t promptly resolve the azotemia. Postrenal obstruction is about a blocked outflow of urine, which requires relieving the obstruction rather than correcting perfusion.

Prerenal azotemia is caused by reduced blood flow to the kidneys. The most common and easily correctable source of this is hypoperfusion from volume depletion or reduced effective circulating volume (for example, dehydration, GI losses, bleeding, or heart failure with low forward flow). When perfusion is restored by fluids or addressing the underlying hemodynamic issue, kidney function often returns to normal because the kidney tissue itself hasn’t been damaged yet.

Intrinsic renal problems, like glomerulonephritis or acute tubular necrosis, involve damage within the kidney itself, so simply correcting perfusion doesn’t promptly resolve the azotemia. Postrenal obstruction is about a blocked outflow of urine, which requires relieving the obstruction rather than correcting perfusion.