Renal Flashcards
Renal tubular acidosis associated with:
abnormal H+ secretion and nephrolithiasis
Type 1 (distal) RTA
Renal tubular acidosis associated with:
abnormal HCO3- reabsorption and rickets
Type II (proximal) RTA
Renal tubular acidosis associated with:
low aldosterone state
Type IV (distal) RTA
What is the treatment of hypernatremia?
NS if unstable vital signs
D5W or 1/2 NS to replace free-water loss
What is the differential diagnosis of hypotonic, hypervolemic hyponatremia?
1) Cirrhosis
2) CHF
3) Nephrotic syndrome
4) Acute kidney injury (AKI)
5) Chronic kidney disease (CKD)
Chvostek and Trousseau signs present in what electrolyte imbalance?
Hypercalcemia
What is the 2 most common causes of hypercalcemia?
1) Malignancy
2) Hyperparathyroidism
What electrolyte imbalance presents with T-wave flattening and U waves on ECG?
Hypokalemia
What electrolyte imbalance presents with peaked T waves and widened QRS on ECG?
Hyperkalemia
What is the treatment of hyperkalemia?
C BIG K
Calcium glutinate; bicarb; insulin; glucose; kayexalate
What is the first-line treatment for moderate hypercalemia?
IV hydration
Type of AKI in a patient with FeNA < 1%
Pre renal
A 49 year old man presents with acute-onset flank pain and hematuria. What is the diagnosis?
Nephrolithiasis
What is the most common type of nephrolithiasis?
Calcium oxalate
What is the test of choice for nephrolithiasis?
Non contrast CT
Ultrasonography shows bilateral enlarged kidneys with cysts. What is the associated brain anomaly?
Cerebral berry aneurysms
autosomal dominant polycystic kidney disease, PCKD
What condition presents with:
hematuria, hypertension, oliguria
Nephritic syndrome
What condition presents with:
proteinuria, hypoalbuminemia, hyperlipidemia, hyperlipiduria, and edema
Nephrotic syndrome
What is the most common form of nephrotic syndrome in adults?
Focal segmental glomerulosclerosis
What kind of nephritic syndrome presents 3 days after URI (*normal C3)?
IgA nephropathy (Beger disease)
What condition presents with:
palpable purpura, arthralgias, abdominal pain
Henoch-Schonlein purpura
What condition presents with:
glomerulonephritis with deafness
Alport syndrome
What condition presents with:
glomerulonephritis with hemoptysis
Granulomatosis with polyangiitis and Goodpasture syndrome
What condition presents with:
red cell casts in urine sediment
Glomerulonephritis/ nephritic syndrome
What condition presents with:
eosinophils in urine sediment
Allergic interstitial nephritis
What condition presents with:
waxy casts in urine sediment and Maltese crosses (seen with lipiduria)
Nephrotic syndrome
What condition presents with:
muddy brown casts
Acute tubular necrosis
What condition presents with:
drowsiness, asterixis, nausea, and a pericardial friction rub
Uremic syndrome seen in patients with renal failure
Salicylate ingestion occurs in what type of acid-base disorder?
Anion gap acidosis and primary respiratory alkalosis due to central respiratory stimulation
What acid-base disturbance is commonly seen in pregnant women?
Respiratory alkalosis
What complication can occur if you correct hyponatremia too rapidly?
Central pontine myelinolysis
What labs will you order for HTN workup?
Urinalysis (protein)
Electrolytes (check K+)
Cr
Fasting blood glucose/ HBA1C
Lipid profile
12-lead ECG (looking for end organ involvement)
Pt with high blood pressure and low potassium
Hyperaldosteronism
Renovascular HTN should be suspected in patients presenting with what?
(Renal artery stenosis)
- Sudden onset worsening of HTN and age <30 or >55
- Abdominal bruit
- HTN resistant to 3 or more drugs
- Rise in Cr of 30% or more with use of ACE or ARB
- Other atherosclerotic vascular disease (pt smoke, dyslipidemia)
- Recurrent pulmonary edema associated with HTN surges
What do you order if you suspect DM with HTN?
urinary protein excretion
What do you order if you suspect renovascular HTN?
renal ultrasound, catopril renal scan, MRA/ CTA
What do you order if you suspect endocrine causes?
plasma aldosterone (will be high) plasma renin (will be low) or 24hr urine aldosterone if plasma tests not available
What do you order if you suspect pheochromocytoma?
24h urine for metanephrines and creatinine
then
CT abdomen
What exogenous factors induce HTN?
NSAIDs Steroids OCPs Decongestants Calcineurin inhib MAOIs, SSRIs, SNRIs Cocaine Salt Liquorice root Alcohol
What test can you use to confirm primary aldosteronism?
Saline loading test
How do you treat hyper aldosteronism?
Surgery
Spironolactone (aldosterone blocker)
Triamterene
Pigmented granular casts
Acute tubular necrosis
How can you differentiate Prerenal AKI from ATN AKI?
FeNa > 1% (ex, 5%) is ATN
FeNa < 1% is prerenal (holding onto sodium)
What is the urea:creatinine ratio in pre renal azotemia?
2:1
Most common cause of nephrotic syndrome in kids
Minimal change
Hallmark of nephrotic syndrome
24 urine protein > 3.5g
How do you screen for diabetic nephropathy?
Urine albumin to creatinine ratio
ACR > 2.8mg/mmol (female), ACR > 2.0mg/mmol (male) consistent with microalbuminuria
Is minimal change disease nephritic or nephrotic syndrome?
NEPHROTIC
damage to glomuerli - give steroids
Features of nephrotic syndrome (“HELP”)
Hypoalbuminemia
Edema
Lipid abnormalities
Proteinuria
Features of nephritic syndrome (“PHAROH”)
Proteinuria Hematuria Azotemia RBC casts Oliguria HTN
Work up of hematuria
PURE hematuria (vs blood + protein) think urology causes
UTI
stone
bladder tumor
RCC (>60yrs) etc
Need CBC, urinalysis, ultrasound, cystoscopy, maybe imaging for stones (CT)
What is the most common type of primary glomerular disease worldwide?
IgA nephropathy (Bergers Disease)
- post URTI
- it’s actually a nephritic syndrome
- compliment level will be normal
Difference between IgA nephroparthy and Post-infectious GN?
IgA = normal C3 Post-Ifxn = low C3
Hallmark of rapidly progressive glomerulonephritis
Fibrous crescents on renal histopathology
also in Goodpastures
Rapidly progressive glomerular nephritis type 1 with hemoptysis and dyspnea
Goodpastures Syndrome
Purport on buttock and legs, abode pain, arthralgia, fever
IgA and C3 staining of mesangium
HSP
Henoch-Schonlein Purpura
c-ANCA is associated with what clinical picture
granulomatosis with polyangiitis
Wegeners
p-ANCA is associated with what clinical picture
microscopic polyangiitis
patient presents with purpura, fever, Raynaud’s phenomenon, arthalgias and Hep C
cryoblobulinemia
How will HIV-associated renal disease present?
FOCAL SEGMENTAL GLOMERULONEPHRITIS
child who received an antibiotic, now presenting with flank pain, WBC casts in urine and eosinophils in urine
ACUTE tubulointerstitial nephritis
patient in ICU who is being treated for sepsis, is hypotensive, with abrupt decline in renal function despite lots of fluids
with high FE Na+ and pigmented granular casts
Acute Tubular Necrosis
what can you give patients with chronic renal disease who require radiographic contrast? (to prevent ATN)
N-acetylcysteine fay before and day of procedure
IV NaHCO3
what is the definition of chronic renal failure
GFR < 60 for >3 months
what are the most common causes of chronic renal disease?
1) DM
2) HTN
3) glomerular nephritis
what do you have to worry about in adults with polycystic kidney disease?
cerebral aneurysms (causing subarachnoid hemorrhage)
what is the best way to reverse uremic signs and symptoms in chronic kidney disease?
renal transplant
where is a renal transplant placed anatomically?
iliac fossa (renal artery of kidney goes to recipient external iliac artery)
significant benefits in quality of life can occur if dialysis is started before what CrCl?
CrCl < 15 mL/min