Renal Flashcards
winter’s formula
hco3 x 1.5 + 6to10
= expected PaCO2 if sufficient respiratory compensation for metabolic acidosis
delta gap
anion gap - normal anion gap
add that difference to HCO3
compare that total to normal HCO3 (24)
if elevated, primary metabolic alkalosis on top of primary anion gap metabolic acidosis going on (e.g. contraction alkalosis)
contraction alkalosis mechanism
not certain, here are a few theories:
- fluid loss w/o bicarb loss ^bicarb conc
- volume contraction -> aldo secretion -> H+ secretion, bicarb resorption
- chloride depletion, failure of Cl-/HCO3- exchanger in distal tubule
anti-___ antibodies correlate with lupus disease activity
anti-dsDNA
TF
need kidney biopsy to diagnose lupus nephritis
F
evidence of AKI with anti-dsDNA antibodies sufficient
anti-Histone antibodies are positive in ____
anti-Histone antibodies positive in Drug-Induced Lupus
drug-induced lupus does Not induce ___ ___ or ___ like non-drug induced lupus does
DI Lupus does NOT induce Nephritis, Serositis, or Cerebritis like non-drug induced lupus does
FeNa can’t be used in pt taking ___
FeNa useless if pt taking FUROSEMIDE
TF
CHF pt can be volume up but have prerenal AKI
T
give furosemide
common complication of EPO administration to ESRD patients
hypertension
TF
hypertension in ESRD pt may be due to calcium and vit D supplementation
F
ESRD pts chronically low in Ca and VitD
more likely due to EPO
TF
Meloxicam causes AKI
T
Meloxicam is an NSAID
2 meds most notorious for causing AKI
NSAIDS
Pip/Tazo (sulfa abx and penicillin)
Meloxicam drug class
NSAID
Metformin is contraindicated in AKI and CKD because
Metormin is Contraindicated in AKI and CKD because it can cause METABOLIC ACIDOSIS
TF
Metformin is contraindicated in AKI and CKD
T
can cause METABOLIC ACIDOSIS
what is the concern with Glipizide in setting of AKI?
HYPOGLYCEMIA, because it reduces insulin clearance
TF
Nifedipine and other CCBs are contraindicated in CKD
F
CCBs strongly indicated in CKD to control HTN
urine microscopy is used to…
assess for Casts when Intrinsic renal disease is on the ddx – ATN AIN Glomerulonephritis
contrast-induced kidney injury occurs how long after contrast study
7-10 days…?
contrast causes ___ of the kidney
NSAIDS cause ___ of the kidney
contrast - ATN
NSAIDS - AIN
how is EPO administered to ESRD pts
what is the goal
IV, during dialysis
goal is Hb of 10
60 pack-year smoking history, microhematuria, flank pain
2 ddx
urologic cancer
kidney stone
African American and AIDS Nephropathy means ___ on kidney biopsy
AA and AIDS Nephropathy means FSGS on kidney biopsy
Focal Sclerosing Glomerular Sclerosis
what to expect on kidney biopsy:
African American AIDS nephropathy
Post-Strep Pharyngitis or Skin Rash or URI with neprhotic range proteinuria
Diabetes
Idiopathic Nephrotic Syndrome, Autoimmune Disease, Hepatitis infection, Drug-Induced Nephrotic Syndrome
Hep C in absence of cryoglobulinemia
Peds asymptomatic other than spilling protein
AA AIDS - FSGS focal segmental glomerular sclerosis
Post-Strep - IgA Nephropathy
DM - Kimmelstiel-Wilson nodules
Idiopathic, AutoImmune, Hepatitis, Drug-Induced – Membranous Nephropathy
HepC without cryoglobulinemia - FSGS
Peds - MCG minimal chage disease
first thought with kidney biopsy:
FSGS
IgA nephropathy
Kimmelstiel-Wilson nodules
Membranous Nephropathy
Minimal Change Disease
FSGS - AfAm AIDS or HepC without cryoglobulinemia
IgA - Post-Strep Pharyngitis, Skin Rash, or URI
K-W nodule - DM
MN - Idiopathic, AutoImmune, Drug-Induced
MCG - Peds, asymptomatic other than spilling protein
treat acute severe hyponatremia, eg from water drinking contest
3% saline
HYPERTONIC
when to give 3% vs .9% saline vs fluid restriction for hyponatremia
3% if acute and severe volume up eg water drinking contest seizure coma
.9% if more chronic volume down eg hiking over the week or inpatient falling behind on fluids with daily lab draws
fluid restriction for SIADH – free water toxicity but more chronic less sever than chugging contest
HTCZ treats what kind of hyponatremia
Furosemide for what kind
HCTZ for Euvolemic hyponatremia
Furosemide for hypERvolemic hyponatremia
how does PTH affect Ca and Phos
vs how does Vit D affect Ca and Phos
PTH ups Ca, downs Phos
Vit D ups both Ca and Phos
when is the only time you measure Calcitonin
MEN syndromes only
high PTH despite high calcium levels… primary, secondary, or tertiary hyperparathyroidism?
primary or tertiary
secondary is caused by low calcium
young healthy guy with family history of calcium disorders has asymptomatic hypercalcemia – Modestly high Ca, PTH, little low Phos, asymptomatic
likely dx
inheritance
next test
likely Familial Hypocalcuric Hypercalcemia (benign)
Autosomal Dominant
next test Urinary Calcium (low)
what are you suspecting when you get 1,25-vit D level in workup of hypercalcemia
Granulomatous disease like TB or Sarcoid
when do you get serum 25-vit D level
working up hypOcalcemia suspecting vitD Deficiency
what is Hungry Bone syndrome
low PTH after parathyroid adenoma resection (remaining pth glands have been suppressed, need a while to turn back on)
difference in calcium levels between early CKD and ESRD
early CKD may be hypOcalcemic because not making vit D
ESRD is hypERcalcemic because not excreting it
treat hypercalcemia from multiple myeloma
vigorous Fluids and Alendronate (bisphosphonates)
TF
fluids fluids fluids fluids - and a little lasix is the treatment for hypercalcemia
Fish
not anymore
Furosemide can cause initial worsening of hypercalcemia via concentration by diuresis…
when is Cincacalcet used
moa
for secondary and tertiary HyperParathyroidism
stimulates Calcium-sensing receptor in Parathyroid glands, Reducing PTH secretion
how do Granulomatous diseases (Sarcoid, TB) cause hypercalcemia?
HyperVitaminosis D
increased 1,25-vitD
how could Prednisone possibly treat hypercalcemia?
if due to Granulomatous disease
Prednisone decrease granulomatous inflammation, decrease hypervitaminosis 1,25-D
when is Calcitonin administered
during acute, severe, and symptomatic hypercalcemia – as a temporizing measure while fluids are being given
calcitriol is ___
it does ___
use it for
calcitriol is 1,25-vitD
it increases Absorption of Ca and Phos from the gut
use it for Renal Failure when Hypocalcemia is driving Parathyroid production – to prevent secondary and tertiary hypercalcemia
Pamindronate is a ____
used to treat ___ and ___
Paindronate is a Bisphosphonate
used to treat Osteopenia in teh elderly and HyperCalcemia from Cancer
If symptomatic hypocalcemia (perioral and fingertip paresthesias), give _______
Gove IV Calcium Gluconate
Black woman, bilateral hilar lymphadenopathy, hypercalcemia
Dx
Pathophys of hypercalcemia
Treat hypercalcemia
Sarcoid
Granulomatous inflammation converts 25-vitD to 1,25vitD
treat with Prednisone
Hypokalemia with non-gap metabolic acidosis can be 2 things
Proximal Renal Tubular Acidosis
(distal would cause hyperkalemia)
Diarrhea
Hypertensive with hypokalemia, best first antihypertensive drug?
ACEI / ARB
~potassium sparing diuretics in a way and first line for HTN
Hydralazine dilates ____
used to treat ____
main side effect is ____
Hydralazine dilates Arteries
used to treat HTN
main side effect is Reflex Tachycardia
guy passed out found to have 3rd degree AV block and hyperkalemia to 9. Heart is paced, treat the hyperkalemia
same as any symptomatic hyperkalemia
3 steps
stabilize myocardial membrane with CALCIUM GLUCONATE or CALCIUM CARBONATE
temporize potassium out of the blood with INSULIN with D50
eliminate potassium from body with KAYEXYLATE (stool), FUROSEMIDE (urine) or HEMODIALYSIS (last resort)
TF
Calcium Carbonate can be used to stabilize myocardial membrane in hyperkalemia just like Calcium Gluconate
T
equivocal