Renal Flashcards
Prerenal AKI versus Intrinsic AKI:
urine sodium
Prerenal: low <20
Intrinsic: high >40
Prerenal AKI versus Intrinsic AKI:
FENa
Prerenal: FENa <1%
Intrinsic: FENa >1-2%
Prerenal AKI versus Intrinsic AKI:
Urine osmolality
Prerenal: high >500
Intrinsic: low <500
Prerenal AKI versus Intrinsic AKI:
BUN:Cr ratio
Prerenal: high >20:1
Intrinsic: low
Prerenal AKI versus Intrinsic AKI:
specific gravity of urine
Prerenal: low (dilute)
Intrinsic: high (concentrated)
5 stages of CKD
1: GFR >90 with evidence of kidney damage
2: GFR 60-89
3. GFR 30-59
4. GFR 15-29
5. GFR <15
when do symptoms of uremia show up in CKD
Stage 3-5
when do lab values show disease (BUN/Cr) in CKD
Stage 3
when do signs of anemia, acidosis, hyperkalemia, hypocalcemia, hyperphosphatemia show up in CKD
Stage 4
what is the best predictor of disease progression in CKD
proteinuria
what is the best way to test for proteinuria in CKD
Spot albumin:cr ratio
preferred over 24h urine
what factors are taken into account in Cockcroft Gault GFR equation
age
weight
creatinine
gender
how to instruct a patient on CKD diet??
low protein
adequate calories, Ca, and Vit D
limit H2O, Na, K and Phos
what should you suspect if someone with CKD has a skull X-ray showing salt and pepper skull, bony cysts, periosteal erosions?
renal osteodystrophy
what is treatment for renal osteodystrophy
Vit D + Ca
Pt with PKD: what is the test of choice
US
fluid-filled cysts will be seen
name some extrarenal manifestations of PKD
berry aneurysms
hepatic, pancreatic, spleen cysts
MVP
diverticula
MC cause of nephrolithiasis
Ca stone