Acute Kidney Injury

Question 1

Acute Kidney Injury (Acute Renal Failure)

Answer 1

Creatinine increased by 0.3 or >50%

Question 2

Types of AKI

Answer 2

Prerenal azotemia
Intrinsic Renal
Postrenal

Question 3

Types of Intrinsic renal AKI

Answer 3

Tubular
Interstitial (10%)
Glomerular (5%)

Question 4

Causes of Tubular (ATN)

Answer 4

Ischemia (50%)

Toxins (35%)

Question 5

Prerenal Azotemia vs. ATN

urine sediment

Answer 5

Prerenal azotemia - benign

ATN - granular casts

Question 6

Prerenal Azotemia vs. ATN

BUN:Creatinine

Answer 6

Prerenal azotemia - >20:1

ATN - <20:1

Question 7

FENa equation

Answer 7

FENa = (UNa/PNa) / (Ucreat/Pcreat)

Question 8

Is urine[Na] or FENa a better prediction of prerenal azotemia vs. ATN?

Answer 8

FENa