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24 Cards in this Set

  • Front
  • Back
First signs of ARF
dec. GFR and inc. creatine in plasma, azotemia
Anuria level
less then 100 ml/day
less then 500 ml/day
NL urine level
greater then 2500
Late sign of ARF
When you order for creatine clearance test
for possible renal failure or disease, or people on nephrotoxic drugs such as some antibiotics (aminoglycosides)-genta, strepto,neo, tobra
normal creatine levels
Normal plasma creatine
less then 1.2 mg/dl
Normal total urine of creatine/day
1-2 g/24 hours
Causes of prerenal failure
stenosis, systemic hypotension, edema; basically anything that decreases renal perfusion and would decrease GFR
causes of renal intrinsic azotemia
Most important determinent of body fluid volume
What is FEna
amount of sodium actually excreted in the urine
Equation for FEna
(Una x Pcre/Pna x Ucre) x100
Excess Na
FEna may reach 5%
Little Na
FEna may only be .1%
FEna that determines prerenal failure
Less then 1%
FEna that determines renal intrinsic failure
greater then 2%
FEna that determines post renail filure
greater then 4%
NL BUN/Cre levels
Pre renal BUN/cre levels
20 or 30
A prerenal failure patient progresses to ATN but BUn/Pre returns to normal due to:
Tubular damages prevents reabsorptoin of Na which causes decreases reabsorption of urea; creatine clearance begins to dec and plasma cre starts to increase
Normal glucose in blood