Nephrology Flashcards
Severe proteinuria means ________ damage?
Glomerular
If the P/Cr ratio or the 24-hour urine are both in answer choices, which should you pick?
P/Cr ratio
What defines microalbuminuria?
30-300mg/24 hrs
What WBCs are in the urine in Acute Interstitial Nephritis?
Eosinophils
Can a normal UA differentiate between eosinophils vs neutrophils?
No, you need a Wright and Hansel stain for eosinophils
What are RBC casts associated with?
Glomerulonephritis
What are WBC casts associated with?
Pyelonephritis
What are Eosinophil casts associated with?
AIN
What are Hyaline cats associated with?
Dehydration
What are waxy casts associated with?
Chronic renal disease
What are granular “muddy brown” casts associated with?
ATN
What are the 3 types of AKI?
- Prerenal azotemia (decreased perfusion)
- Postrenal azotemia (obstruction)
- Intrinsic renal disease (ischemia and toxins)
NSAIDS constrict the ________ arteriole?
Afferent
ACE inhibitors dilate the ________ arteriole?
Efferent
Can retroperitoneal fibrosis (from bleomycin, radiation) cause postrenal azotemia?
Yes
What’s the most common cause of intrinsic renal disease?
ATN
What is ATN from?
Toxins or prolonged ischemia
What can the following all cause:? AIN Rhabdo Contrast agents Chemo drugs NSAIDS Crystals Bence-Jones protein Post-strep infex
ATN
What imaging study is dangerous in a patient with borderline renal function?
CT angio
How do you differentiate between the types of AKI with labs?
If BUN:creatinine is above 20:1, it’s either pre-or post. Intrarenal BUN:creatinine is more like 10:1.
Can postrenal AKI present with massive release of urine with catheter placement?
Yes
How does prerenal azotemia present with urine sodium?
Low UNa (<20) and low FENa (<1%)
When do you give a sickle cell patient hydroxyurea?
If they have painful crises >4x per year
What’s the urine sodium lab in ATN?
> 20
What’s the FENa in ATN?
> 1%
How long does CT contrast take to cause kidney injury?
Immediately/next day
What are the following labs in contrast-induced ATN (hint: they’re not the normal ATN values bc the contrast causes spasm of the afferent arteriole)?:
UNa:
FENa:
Urine specific gravity:
UNa: 5 (very low)
FENa: <1%
Urine specific gravity: 1.040 (very high)
2 days after chemo, creatinine rises in a person with a hematologic malignancy due to _____ _____ ____?
Tumor lysis syndrome (hyperuricemia)
How long does it take for cisplatin and drug toxicities to cause a rise in creatinine?
5-10 days
What can be given prior to chemo to avoid tumor lysis syndrome associated renal failure?
Allopurinol, hydration, and rasburicase
What toxic ingestion can cause ATN, hypocalcemia, and oxalate crystals?
Ethylene glycol
What is methanol toxicity associated with?
Inflammation of the retina
What is opioid toxicity associated with in terms of the kidney?
Focal segmental glomerulonephritis
What can abx, acyclovir, amphotericin, cisplatin, and vancomycin all cause?
ATN
What can trauma, prolonged immobility, snake bites, cocaine, seizures, statins, hypokalemia, and crush injuries all cause?
Rhabdomyolysis
T/F: don’t treat hypocalcemia in rhabdomyolysis if asymptomatic?
True; the Ca will come back out of the muscles
T/F: there is no specific therapy proven to benefit ATN?
True; don’t answer steroids, diuretics, mannitol, or DA
Do you dialyze for hypocalcemia?
No, give vitD and calcium
What are the 5 main indications for initiating dialysis?
- Fluid overload
- Encephalopathy
- Pericarditis
- Metabolic acidosis
- Hyperkalemia
Does furosemide cause ototoxicity?
Yes
What dx is caused by liver disease and presents with very low uNa (<10-15), FENa <1%, and elevated BUN:creatinine >20:1?
Hepatorenal syndrome
What can cause Livedo Reticularis and eosinophiluria?
Cholesterol emboli
What 2 common abx can cause AIN?
- Penicillins
2. Sulfa drugs
T/F: AIN usually resolves spontaneously, but temporary dialysis and steroids may be needed?
True
What dx presents in sickle cell patients with extra NSAID use and sudden onset of flank pain, fever, and hematuria, wth visible necrotic material passed in the urine?
Papillary necrosis
Is there a tx for papillary necrosis?
No
What will a UA show in papillary necrosis?
Red and WBCs
Are tubular injuries normally acute or chronic?
Acute
Are glomerular injuries normally acute or chronic?
Chronic
What are glomerular injuries often treated with?
Steroids
What dx presents with UA with hematuria, dysmorphic RBC’s, RBC casts, low UNa and FENa, and proteinuria?
Glomerulonephritis
What do the following 4 conditions have in common?: SLE Endocarditis Cryoglobulinemia Post-strep glomerular disease
Low complement levels
Goodpasture disease is limited to which 2 organs?
- Lung
2. Kidney
What does kidney biopsy show in Goodpasture syndrome?
Linear deposits
What’s the best initial test for Goodpasture syndrome?
Antiglomerular basement membrane antibodies
What’s the best tx for Goodpasture syndrome?
Plasmapharesis and steroids
What dx presents in an Asian patient with recurrent episodes of gross hematuria 1-2 days after a URI?
IgA Nephropathy
How long after strep does glomerulonephritis follow?
1-2 weeks
How do you treat severe proteinuria in IgA nephropathy (?
ACE inhibitors and steroids
What dx presents with cola colored urine, periorbital edema, hypertension, oliguria, and has proteinuria and RBC casts?
Post-Strep Glomerulonephritis
How do you confirm PSGN?
Antistreptolysin O titers (ASO)
What dx is a congenital defect of collagen that results in glomerular disease combined with hearing loss, visual disturbance?
Alport Syndrome
What type of collagen is Alport Syndrome a defect in?
Type IV collagen
Stroke or MI in a young person suggests which vasculitis?
PAN
What’s the best initial test for PAN?
Renal, mesenteric, or hepatic angiography?
What tx (2 drugs) do you use for the following:
- SLE
- PAN
- Granulomatosis w/ polyangiitis
- Eosinophilic granulomatosis with polyangiitis
- Microscopic polyangiitis
Steroids + cyclophosphamide
______is indispensable in determining therapy for lupus nephritis?
Biopsy
What abnormal protein is associated with the following conditions?: Myeloma Inflammation RA IBD Chronic infex
Amyloidosis
What’s the definition of nephrotic syndrome?
When the severity of proteinuria is so great that the liver can’t produce enough albumin to compensate
What can cause nephrotic syndrome in kids?
Minimal change disease
What are the 2 most common causes of nephrotic syndrome?
- Diabetes
2. HTN
How does nephrotic syndrome present?
Generalized edema
How do you differentiate between CHF and nephrotic?
CHF leads to edema of dependent areas (like the legs); nephrotic patients are edematous everywhere