Renal Pathophys Part 1 - Schoeny (exam 3) Flashcards
Normal urine production per day?
1.5L
What is azotemia?
Elevated BUN and Cr +/- anuria
3 types of AKI?
Prerenal, renal, postrenal
Causes of prerenal AKI?
Low volume stimulus (hypovolemia, heart failure, sepsis)
Renal vascular pathology (stenosis, atherosclerosis)
Causes of intrinsic AKI?
ATN, glomerular disease, AIN
BUN:Cr in prerenal AKI?
> 20:1
BUN:Cr in intrinsic AKI?
<20:1
Causes of postrenal AKI?
Obstruction, kidney stones
Clinical symptoms of AKI?
Electrolyte disurbances Decreased urine output Lethargy Fatigue Nausea
Urine findings in prerenal AKI?
FENa < 1%
Urine sodium <20
Urine osmolality >500
Urine SG > 1.020
Urine findings in intrinsic AKI?
FENa>1%
Urine sodium >20
Urine osmolality <400
Urine SG <1.010
Most common causes of chronic renal failure?
DM, HTN, glomerulonephritis
4 stages of chronic renal failure and % GFR remaining in each stage?
Diminished renal reserve - GFR = 50%
Renal insufficiency - GFR =20-50%
Renal failure -GFR <20%
End stage renal failure - GFR<5%
A segmental glomerular disorder describes what?
A disorder where only a portion of the glomerulus is involved.
A global glomerular disorder describes what?
A disorder where all of the glomerulus is involved.
A focal glomerular disorder describes what?
A disorder where some of the glomeruli are involved.
A diffuse glomerular disorder describes what?
A disorder where almost all of the glomeruli are involved.
Techniques to evaluate glomeruli include what 3 types microscopy?
Light microscopy
Immunofluorescence
Electron microscopy
What types of stains are used in light microscopy?
What are they used for?
Periodic Acid Schiff (PAS) - highlights basement membrane and magnesium
Trichrome - highlights fibrosis
Silver - Highlights basement membrane
Immunofluorescence uses what type of antibodies?
IgG, IgM, IgA
A linear pattern on immunofluorescence indicates?
Reaction directed against antigen in glomerular basement membrane -> goodpasture syndrome
A granular pattern on immunofluorescence indicates?
Reaction against antigen/antibody immune complexes in glomerular basement membranes -> SLE
What can be seen on electron microscopy?
Structure and immune complex deposition
Clinical manifestation of glomerular diseases include(5)?
Nephrotic syndrome Nephritic syndrome Rapidly progressive glomerulonephritis Chronic renal failure Asymptomatic hematuria
Most glomerular diseases are _____ in nature
Immunologic