AKI-pre and obst Flashcards
1
Q
what is the normal kidney response to fall in BP?
A
Pg’s dilate afferent and AT2 constricts efferent. Aldosterone and ADH release
2
Q
What FEUrea is indicative of Prerenal AKI? ATN?
A
<35%, 50-65%
3
Q
What are main causes of Prerenal AKI
A
GI loss, NSAIDS (most cases are outpatient)
4
Q
What labs indicate prerenal injury? Na? FENa? BUN/Pcr? sediment in urine?
A
Na20:1, bland urine sediment
5
Q
why does BUN/cr go up?
A
enhanced tubular reabsorption of urea in low urine flow states
6
Q
What effect does postrenal injury have?
A
Na wasting, decreased K secretion (hyperkalemia), impaired H+ secretion (distal RTA)
7
Q
what are the main causes of postrenal injury?
A
tumors, claculi, prostate, congenital
