2/25/2024 0 Comments Bun cr normal range![]() In turn, the decreased flow and pressure to the kidney will be sensed by baroreceptors in the Juxtaglomerular (JG) Cells of the afferent arteriole. Renal Plasma Flow (RPF) is decreased due to hypoperfusion which results in a proportional decrease in Glomerular Filtration Rate (GFR). The reason for this lies in the mechanism of filtration of urea and creatinine. The BUN:Cr in prerenal azotemia is greater than 20. It can occur following hemorrhage, shock, volume depletion, congestive heart failure, adrenal insufficiency, and narrowing of the renal artery among other things. However, there is no inherent kidney disease. Prerenal azotemia is caused by a decrease in blood flow ( hypoperfusion) to the kidneys. The BUN:Cr ratio is a useful measure in determining the type of azotemia and will be discussed in each section below. For historical reasons, the lab test measuring urea is known as " blood urea nitrogen" (BUN) in the US. Measurements of urea and creatinine (Cr) in the blood are used to assess renal function. ![]() It can lead to uremia and acute kidney injury (kidney failure) if not controlled.Īzotemia has three classifications, depending on its causative origin: prerenal azotemia, renal azotemia, and postrenal azotemia. ![]() It is largely related to insufficient or dysfunctional filtering of blood by the kidneys. Azotemia ( azot, "nitrogen" + -emia, "blood condition") is a medical condition characterized by abnormally high levels of nitrogen-containing compounds (such as urea, creatinine, various body waste compounds, and other nitrogen-rich compounds) in the blood. ![]()
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