Flashcards in Kidney: Acute Renal Failure Deck (15):
1
What is the hallmark of ARF?
Azotemia
2
What lab values indicate azotemia?
Inc BUN and Cr
3
Cause of prerenal azotemia?
decreased blood flow to the kidneys
4
BUN: Cr ratio in prerenal azotemia?
>15
5
FeNa in prerenal azotemia?
<1%
6
What causes postrenal azotemia?
obstruction of urinary tract downstream from the kidney
7
BUN: Cr ratio in postrenal azotemia?
>15 early
<15 late (due to tubular damage)
8
FeNa in postrenal azotemia?
2% late
9
"injury and necrosis of tubular epithelial cells"
Acute Tubular Necrosis
10
What is the MOST common cause of intrarenal acute renal failure?
Acute Tubular Necrosis
11
What can cause ATN?
Ischemic or nephrotoxic
12
What is a diagnostic finding in ATN?
Brown granular casts
13
BUN: Cr in ATN?
<15
14
FeNa found in ATN?
>2%
15