Differential diagnosis of Prerenal AKI and ATN Flashcards
1
Q
Fractional excretion of Na<1%
A
Prerenal
2
Q
Fractional excretion of Na>2%
A
ATN
3
Q
Urine Na conc <20
A
Prerenal
4
Q
Urine Na con >40
A
ATN
5
Q
Urine specific gravity >1.018
A
Prerenal
6
Q
Urine specific gravity ~1.010
A
ATN
7
Q
Urine osmolality >500
A
Prerenal
8
Q
Urine osmolality ~300
A
ATN
9
Q
Plasma BUN/creatinine ratio >20
A
Prerenal
10
Q
Plasma BUN/creatinine ratio <10-15
A
ATN
11
Q
Urine sediment=hyaline casts
A
prerenal
12
Q
urine sediment = muddy brown…
A
ATN
