Tubulointerstitial/Vascular/Chronic Kidney disease Flashcards
cast nephropathy in multiple myeloma due to
factors favoring intratubular percipitation and cast formation (3)
due to excessive production and urinary excretion of light chains
factors: hypercalcemia
volume depletion
nephrotoxins
2 findings in chronic kidney disease, due to uremic toxin buildup
coagulopathy > platelet dysfunction
sensorimotor neropathy
cortical infarct morpholhy
renal artery occlusion > extensive parenchymal infarction
smaller branch - wedge shaped infarct, pale with yperremic baorder and coagulation necrosis, hemorrhage+acute inflam at edge
later fibrosis
predisposing conditions pyelonephritis
urinary obstruction
UT instrumentation
vesicoureteral reflux
pregancy
diabetes
often occurs after artial angiography
histopathologic evidence of clefts in vascular lumen
causes both acute and progressive kidney dysfunction
aheroembolic dieseases
mechanism of secondary hyperparathyroidism in chronic kidney disease
decreased renal synth of 1,25-dihyrdroxy D3 AND decreased phosphate excretion lead to:
hypocalcemia
hyperphosphatemia
renal osteodystrophy
treatment myeloma cast nephropathy
hydration and urinary alkalinization to prevent tubular obstruction by casts
chemo or stem cell transplant
kidney transplant at what point?
GFR
typical bacteria of pyelonephritis
gram neg bacilli
renal artery stensosis from atherosclerosis morpholohy
proximal stenosis
excentric plaque with intimal fibrosis, cell debris, lipid+foam cells
medial and adventitial fibrosis
plaque may hemorrhage or disect
calcification
presenting features multiple myeloma
>40
renal insuffciency+proteinuria
hx of bone pain and fractures
hypercalcemia
monoclonal light chains in blood/urine
thrombotic microangiopathy characterized by (3)
thrombosis in capillaries+arterioles (microangiopathic hemolytic anemia, thromboytopenia, renal failure)
Hemolytic uremic syndrome
thrombot thrmbocytopenic purpura
mechanism of HTN in renal artery stenosis
not enough pressure to kidney > increased renin production due to perceived hypotension
causes acute interstitial nephritis
drug hypersensitivity (PCN, NSAIDs. sulfonamides, rifampin)
infection
autoimmune - SLE, sjogrens
suspect renal artery stenosis in:
elderly or late onset HTN
difficult to control HTN
abdominal or flank bruit
renal failure after starting ACEi