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Azotemia has three classifications, depending on its causative origin: prerenal azotemia, renal azotemia, and postrenal azotemia. [2] Measurements of urea and creatinine (Cr) in the blood are used to assess renal function. For historical reasons, the lab test measuring urea is known as "blood urea nitrogen" (BUN) in the US. The BUN:Cr ratio is ...
The causes of acute kidney injury are commonly categorized into prerenal, intrinsic, and postrenal. Acute kidney injury occurs in up to 30% of patients following cardiac surgery. [23] Mortality increases by 60-80% in post-cardiopulmonary bypass patients who go on to require renal replacement therapy.
Prerenal azotemia can be caused by decreased blood flow through the kidneys (e.g. low blood pressure, congestive heart failure, shock, bleeding, dehydration) or by increased production of urea in the liver via a high protein diet or increased protein catabolism (e.g. stress, fever, major illness, corticosteroid therapy, or gastrointestinal ...
Prerenal acute kidney injury. Acute kidney injury, or AKI, is when the kidney isn’t functioning at 100% and that decrease in function usually over a few days. Actually, AKI used to be known as acute renal failure, or ARF, but AKI is a broader term that also includes subtle decreases in kidney function.
Prerenal (before the kidney) BUN reabsorption is increased. BUN is disproportionately elevated relative to creatinine in serum. This may be indicative of hypoperfusion of the kidneys due to heart failure or dehydration. [4] Gastrointestinal bleeding or increased dietary protein can also increase the ratio. [4] 12–20:1 40–110:1
prerenal disease: the physiologic response to a decrease in kidney perfusion is an increase in sodium reabsorption to control hyponatremia, often caused by volume depletion or decrease in effective circulating volume (e.g. low output heart failure). above 2% [citation needed] or 3% [2] acute tubular necrosis or other kidney damage (postrenal ...
Kidney failure, also known as renal failure or end-stage renal disease (ESRD), is a medical condition in which the kidneys can no longer adequately filter waste products from the blood, functioning at less than 15% of normal levels. [2]
Cardiorenal syndrome (CRS) is an umbrella term used in the medical field that defines disorders of the heart and kidneys whereby "acute or chronic dysfunction in one organ may induce acute or chronic dysfunction of the other". [1]