Renal (Exam #3) Flashcards
GENERALLY for kidney disease, what two values should be low and which one should be high?
- LOW: GFR, UO
- HIGH: Cr
What is a measure of number of functional nephrons? Can this be measured directly?
GFR
- NOPE, need MDRD or Cockcroft-Gault formulas
What lab value is used to screen or monitor disease with tx for prostate CA?
Prostate-Specific Antigen (PSA)
PSA is seen in all males but high if… (4)?
- Prostate CA
- BPH
- Prostatitis
- AFTER prostate manipulation
What diagnostic test should be used to detect prostate CA in patients with a HIGH PSA?
Prostate US/Biopsy transrectally (TRUS)
High ANA is indicative of what?
SLE
High C-ANCA/P-ANCA is indicative of what?
Granulomatosis with Polyangiitis (GPA)
High Anti-GBM is indicative of what?
Goodpasture Syndrome
What UA finding is earliest clinical sign of diabetic nephropathy?
Microalbumin
What UA finding is never normal; seen with acute interstitial nephritis?
Urine Eosinophils
Bence Jones proteins seen on what diagnostic test is indicative of MM?
UPEP
What is the first line radiographic test ordered if renal failure of UO or “abdominal/flank pain”?
Renal US
What radiographic test can distinguish renal mass vs. cyst?
CT Scan
What is the gold standard test for nephrolithiasis?
CT WITHOUT contrast
What is the concern with using Iodine contrast, and what can this lead to?
Can be nephrotoxic
- Can cause Contrast-Induced Nephropathy = CNI
What medication should be held for 48 hours prior to performing a CT WITH contrast, and WHY?
Metformin
- Avoid lactic acidosis
What is the gold standard test for renal vein thrombosis?
MRI
What might Gadolinium contrast may increase risk for?
Nephrogenic systemic fibrosis
What radiographic test can show “string of pearls”, and what is this indicative of?
Renal Angiography
- Indicates Fibromuscular Dysplasia
What test is x-ray w/ contrast; almost never ordered because other tests available (dye concern)?
Intravenous Pyelogram (IVP)
What test is preferred to IVP for bladder-specific conditions?
Cystourethrogram
With what test is post-procedural hematuria expected and should clear within 3 voids?
Cystoscopy
- Commonly used by urology
- Cystoscope inserted into urethra → bladder
If ordering a Testicular US, what other test should always be obtained, and why?
Obtain Doppler to evaluate blood flow
- R/O testicular torsion
What involves diseases that present in nephritic spectrum; inflammatory process → renal dysfunction?
Glomerulonephritis (GN)
What condition involves hematuria (smoky/cola-colored)?
Glomerulonephritis (GN)
What condition involves RBC casts?
Glomerulonephritis (GN)
What condition involves dysmorphic RBCs?
Glomerulonephritis (GN)
What condition involves proteinuria (<3 g/day)?
Glomerulonephritis (GN)
With what condition will you not see clots in hematuria, but may have proteinuria?
Glomerulonephritis (GN)
What is the general treatment for Glomerulonephritis (GN)? What medication may be considered?
Depends on underlying cause SO JUST nephrology referral
- Consider ACE-I/ARB for renoprotection
With what two conditions should IMMEDIATE hospitalization be considered with Glomerulonephritis (GN)?
- Acute Nephritic Syndrome
- Rapidly Progressive Glomerulonephritis (RPGN)/Crescentic Glomerulonephritis
What condition is due to progressive loss of renal function over short period of time?
Rapidly Progressive Glomerulonephritis (RPGN)
- AKA Crescentic Glomerulonephritis
What condition involves crescent formation of glomerular cells?
Rapidly Progressive Glomerulonephritis (RPGN)
- AKA Crescentic Glomerulonephritis
What is the most common cause of primary Glomerulonephritis (GN)?
IgA Nephropathy
What condition peaks 2nd and 3rd decades of life, often male?
IgA Nephropathy
What condition involves gross hematuria 1-2 DAYS after URI?
IgA Nephropathy
With IgA Nephropathy, if there is persistent proteinuria >1 g/dL, high Cr/low GFR or HTN, what medication should be considered?
ACE-I/ARB +/- steroids
What condition is due to group A beta-hemolytic strep; more common in male children?
Poststreptococcal Glomerulonephritis (PSGN)
What condition occurs 1-3 WEEKS after pharyngitis or skin infection (impetigo)?
Poststreptococcal Glomerulonephritis (PSGN)
What diagnostic finding is indicative of Poststreptococcal Glomerulonephritis (PSGN)?
Recent GAS infection with high ASO or +throat/skin culture
What is the recommended treatment for Poststreptococcal Glomerulonephritis (PSGN)?
SUPPORTIVE
Is recurrence of Poststreptococcal Glomerulonephritis (PSGN) common or rare?
RARE
What condition involves tetrad of palpable purpura (rash), arthralgias, abdominal pain, renal disease after URI?
IgA Vasculitis (IgAV) = Henoch-Schönlein Purpura (HSP)
What tetrad of symptoms is seen with IgA Vasculitis (IgAV) = Henoch-Schönlein Purpura (HSP)?
- Palpable purpura
- Arthralgias
- Abdominal pain
- Renal disease
What is the recommended treatment for IgA Vasculitis (IgAV) = Henoch-Schönlein Purpura (HSP)?
SUPPORTIVE
What age group has higher risk of progressive renal disease a few days-1 month after onset of systemic sxs with IgA Vasculitis (IgAV) = Henoch-Schönlein Purpura (HSP)?
ADULTS
What two age groups are most affected by Anti-GBM Antibody Disease (Goodpasture Syndrome)?
- Male in 3rd decade (more severe)
- Female in 6th/7th decade
What two conditions/findings are consistent with Anti-GBM Antibody Disease (Goodpasture Syndrome)?
- RPGN
- Alveolar hemorrhage (pulmonary)
What condition involves anti-GBM antibodies in serum or biopsy? What other test may be positive?
Anti-GBM Antibody Disease (Goodpasture Syndrome)
+/- positive ANCA
What two medications are recommended for treatment of Anti-GBM Antibody Disease (Goodpasture Syndrome)?
- Prednisone
- Cyclophosphamide
What condition presents with +Anti-ds DNA antibodies?
Lupus Nephritis (LN) aka Systemic Lupus Erythematosus Nephritis
What condition is ANCA-associated, where ANCA antibodies produce tissue and vascular damage?
Pauci-Immune Glomerulonephritis
What are the three possible causes of Pauci-Immune Glomerulonephritis? How do you treat ALL THREE?
- Granulomatosis with Polyangiitis (GPA)
- Microscopic Polyangiitis (MPA)
- Eosinophilic Granulomatosis with Polyangiitis (EGPA)
Tx: referral +/- immunosuppressants
What condition involves necrotizing granulomas, and what is it a possible cause of?
Granulomatosis with Polyangiitis (GPA)
- Possible cause of Pauci-Immune Glomerulonephritis
What triad is consistent with Granulomatosis with Polyangiitis (GPA)?
- Upper respiratory sxs
- Lower respiratory sxs
- GN
What condition involves nasal/oral inflammation, saddle nose deformity; RPGN common?
Granulomatosis with Polyangiitis (GPA)
How can you differentiate Granulomatosis with Polyangiitis (GPA) from Microscopic Polyangiitis (MPA) and Eosinophilic Granulomatosis with Polyangiitis (EGPA)?
GPA = C-ANCA
- MPA and EGPA = P-ANCA
What condition involves ONLY lower respiratory sxs and GN? How does this differ from Granulomatosis with Polyangiitis (GPA)?
Microscopic Polyangiitis (MPA)
- NO granulomas
- NO upper resp. sxs
What two findings/symptoms are associated with Eosinophilic Granulomatosis with Polyangiitis (EGPA)?
- Asthma
- Eosinophilia
What condition involves prodromal (Atopic Triad) → Eosinophilic → Vasculitis (systemic renal sxs)?
Eosinophilic Granulomatosis with Polyangiitis (EGPA)
What condition is common; often asymptomatic and found incidentally on US?
Simple Renal Cyst
What condition is benign = NO enhancement with contrast, round, sharply demarcated, smooth walls?
Simple Renal Cyst
What condition is an inherited disease that causes irreversible decline in kidney function? What are the two types, and what symptom/finding is seen with BOTH?
Polycystic Kidney Disease (PKD)
- Autosomal Dominant PKD (ADPKD)
- Autosomal Recessive PKD (ARPKD)
BOTH have bilateral marked kidney enlargement
In Autosomal Dominant PKD (ADPKD), which gene is mutated? In Autosomal Recessive PKD (ARPKD), which gene is mutated?
- ADPKD: PKD1 OR PKD2
- ARPKD: PKD1 only
How does the presentation of Autosomal Recessive PKD (ARPKD) differ from ADPKD? What can this lead to (2)?
Kidneys AND Liver
- Bilateral marked kidney enlargement AND congenital hepatic fibrosis
Can lead to HTN and portal HTN
What two non-renal conditions are often associated with Autosomal Dominant PKD (ADPKD)?
- HTN
- Liver cysts
What two non-pharmacologic treatments are recommended for Autosomal Dominant PKD (ADPKD)?
- Strict BP control/low-salt diet
- Pain control
What medication can also be prescribed to treat Autosomal Dominant PKD (ADPKD)?
Tolvaptan
What condition involves abrupt loss of kidney function resulting in urea retention, dysregulation of volume status and electrolytes?
Acute Kidney Injury (AKI)
What are the three aspects of KDIGO Diagnostic Criteria (need 1 of 3)?
- Increase in serum Cr by >0.3 mg/dL within 48 hours
- Increase in serum Cr to >1.5 times baseline
- Urine volume <0.5 mL/kg/hour for 6 hours
What renal condition is often common in hospitalized patients, and what are two likely causes?
Acute Kidney Injury (AKI)
- Prerenal disease
- ATN
What does prerenal etiology of Acute Kidney Injury (AKI) mean?
Decreased renal BF
What does intrinsic etiology of Acute Kidney Injury (AKI) mean?
Acute tubular necrosis (ATN)
- Pathology of vessels, glomeruli, tubules
What does post renal etiology of Acute Kidney Injury (AKI) mean?
Obstruction
What is the most common renal etiology of Acute Kidney Injury (AKI)? What is second most common?
MOST common = ATN (intrinsic)
- 2nd most common: prerenal
What are five possible causes of prerenal Acute Kidney Injury (AKI)?
- Volume depletion
- Hypotension
- Edema
- Selective renal ischemia
- Drugs affecting GFR
What two drug groups can cause prerenal Acute Kidney Injury (AKI)?
- NSAIDs
- ACE-I
What are three possible causes of intrinsic Acute Kidney Injury (AKI)?
- Renal ischemia
- Sepsis
- Nephrotoxins (IV contrast)
What are three risk factors for IV contrast toxicity in intrinsic Acute Kidney Injury (AKI)?
- Pre-existing renal disease
- Volume depletion
- Repeated doses of contrast
What can cause renal tubular epithelial cell toxicity, renal medullary ischemia?
IV contrast toxicity
A reduction in GFR WITHOUT hx of prerenal requires what for posterenal Acute Kidney Injury (AKI)?
BILATERAL obstruction
What are two of the most common reasons for posterenal Acute Kidney Injury (AKI)?
- Prostatic disease (BPH, CA)
- Metastatic CA
What condition involves “muddy brown casts”?
ATN
What does FENa measure? What does an FENa <1% indicate? What does an FENa >2% indicate?
FENa = measures % of Na+ excreted in urine
- FENa <1% = prerenal
- FENa >2% = ATN
What test can be used to assess for obstruction, and what can obstruction predispose you for?
Renal US
- Obstruction can predispose for UTI → urosepsis → kidney failure
SEVERE Acute Kidney Injury (AKI) can present with what symptom?
AMS
What are six possible complications of Acute Kidney Injury (AKI)? What is often the treatment if any of these complications are present?
- Volume imbalance
- Metabolic acidosis
- Hyperkalemia
- Hypocalcemia
- Hyperphosphatemia
- Uremia
If complications present, often requires hemodialysis to treat
If volume depleted due to Acute Kidney Injury (AKI), what is the recommended treatment? If the patient does not respond, what is the likely etiology of AKI?
1-3 L of IV fluids (isotonic crystalloids)
- Likely ATN or intrinsic AKI (not prerenal)
If volume overloaded due to Acute Kidney Injury (AKI), what is the recommended treatment? What should be considered with this treatment decision?
Diuretics temporarily
- STOP diuretics if UO does not increase with diuretic use (NOT for long-term use)
If mild case of metabolic acidosis due to Acute Kidney Injury (AKI), what is the recommended treatment? What symptom especially calls for this treatment?
Give bicarbonate
- Especially if diarrhea
- If overloaded, no bicarb because → increase Na+ load
If overloaded or severe case of metabolic acidosis due to Acute Kidney Injury (AKI), what is the recommended treatment? Why can’t bicarbonate be used to treat overload AKI?
Dialysis
- If overloaded, no bicarb because → increase Na+ load
What can hyperkalemia due to Acute Kidney Injury (AKI) cause symptomatically (2)? How do you treat this (2)?
NM issues and/or arrhythmias
- Treat with medicine and dialysis (drive K+ from ECF → ICF and remove excess K+)
What often causes Hypocalcemia due to Acute Kidney Injury (AKI)?
Hypocalcemia often occurs because of hyperphosphatemia
If symptomatic hypocalcemia due to Acute Kidney Injury (AKI), what is the recommended treatment? What three symptoms might present as hypocalcemia?
Give IV Calcium
- Trousseau’s sign
- Chvostek’s sign
- QT prolongation
If asymptomatic hyperphosphatemia of >5.5 mg/dL present with Acute Kidney Injury (AKI), what is the recommended treatment?
Phosphate binders
For hyperphosphatemia + LOW serum Ca2+ with Acute Kidney Injury (AKI), what is the recommended treatment (2)?
- Calcium acetate
- Calcium carbonate
For hyperphosphatemia + HIGH serum Ca2+ with Acute Kidney Injury (AKI), what is the recommended treatment (2)?
- Aluminum hydroxide
- Lanthanum carbonate
What stage is uremia (“urine in blood) more common with, and what is the recommended treatment if severe?
More common in CKD
- If severe (neuropathy, pericarditis), start dialysis
What involves diffusion of small molecules down their concentration gradient? What types of molecules CAN diffuse?
Dialysis
- Small molecules = waste (urea, Cr, K+ and excess fluid) can cross
What is the general prognosis for Acute Kidney Injury (AKI)?
MOST recover renal function with normalized Cr and UO
- BUT MANY have residual renal dysfunction
What two issues are those with an Acute Kidney Injury (AKI) at increased risk for?
- Another AKI
- Develop CKD
What constitutes Chronic Kidney Disease (CKD)?
- Decreased kidney function (GFR <60)
OR - Kidney damage (albuminuria with ACR of 30+)
FOR 3+ MONTHS = chronic
What constitutes Stage 1 kidney disease?
Kidney damage with normal GFR (90+)
What constitutes Stage 2 kidney disease?
Kidney damage with mildly low GFR (60-89)
What constitutes Stage 3a kidney disease?
Mild/moderate GFR of 45-59
What constitutes Stage 3b kidney disease?
Moderate/severe GFR of 30-44
What constitutes Stage 4 kidney disease?
Severely low GFR (15-29)
What constitutes Stage 5 kidney disease?
FAILURE (GFR <15)
What constitutes Stage 1 kidney disease (ACR specifically)?
Normal/mild increase of ACR (<30)
What constitutes Stage 2 kidney disease (ACR specifically)?
Moderately increased ACR (30-300)
What constitutes Stage 3 kidney disease (ACR specifically)?
Severely increased ACR (>300)