True about pre-renal azotemia
In pre-renal azotemiaBUN/creatinine ratio above 20, FeNa<1%, hyaline casts in urine sediment,urine specific gravity >1.018, urine osmolality >500 mOsm/kgPigmented "muddy brown" granular casts and tubular epithelial cell casts are seen in acute tubular necrosis.Ref: Harrison's 19e pg: 1805
"Muddy brown" granular casts
Urine creatinine / plasma creatinine > 20
FeNa <1
Urine osmolality >500 mOsm/kg
All India exam