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Acute Renal Failure
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Sudden loss of renal function that may be reversible
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Causes of acute renal failure
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Illness, injury, or toxin that stresses the kidneys.
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Classifications of acute renal failure
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Prerenal, intrarenal and postrenal depending on the location of the illness in relation to the kidneys
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Prerenal failure
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Result of insufficient blood flow into the kidneys caused by shock, trauma, severe dehydration or cardiac disease
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Intrarenal failure
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Result of direct toxic or traumatic injury to the kidney
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Postrenal failure
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Results when an obstrucction from the lower urinary system causes backup of urine, which injures the kidneys
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Chronic Renal Failure
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Long, usually slow process that involves a progressive loss of nephrons (loss of more than 75% of nephrons in each kidney to cause obvious illness)
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Chronic renal failure to ESRD
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May take many years to progress from chronic renal failure to ESRD
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Characterizatons of Chronic Renal Failure
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Proteinuria, Nocturia, Hypertension, Sodium retention, Anemia, Dyspnea, Uremic symptoms, Nausea and vomiting
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Proteinuria
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Leaking of protein through the glomeruli in to the renal tubules, and then into the urine
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Nocturia
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Night time urination due to loss of the ability to concentrate the urine
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Hypertension
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High blood pressure
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Sodium retention
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Leading to edema, or water retention/swelling
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Anemia
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A shortage of red blood cells
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Dyspnea
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Difficulty breathing
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