Urology/Renal Flashcards
average acid base values
“24/7 40/40”
HCO3: 24
pH: 7.40
CO2: 40
7 causes of renal vascular dz
DM - mc
htn
smoking
renal a stenosis
glomerular dz
renal cysts
AI/SLE/PCKD/alport’s
presentation of ARF/AKI (3)
rapid decline in renal fxn:
elevated SCr
decreased GFR
elevated BUN (azotemia)
3 types of ARF/AKI
prerenal
intrinsic
postrenal
causes of prerenal ARF/AKI
decreased kidney perfusion -> loss of peripheral vascular resistance:
hypovolemia - mc
nsaids
IV contrast
ACEI
ARBs
t/f: w. prerenal failure, the nephrons remain intact
t!
6 sx of prerenal AKI
weak
decreased urine output
dizzy
sunken eyes
tachy
orthostatic
lab findings associated w. prerenal AKI
FEN: normal
urine SpGr: > 1.030
BUN/Cr: > 20
Urine Osm: > 500
tx for prerenal AKI
fluids
BP support
5 causes of intrinsic renal failure
drugs
tumor lysis syndrome
vasculitis (SLE/sarcoidosis)
gout
rhabdo
2 nephrotoxic drugs
aminoglycosides
cyclosporine
hallmark finding of intrinsic AKI
RBC casts
types of cast and associated condition
RBC: glomerulonephritis
WBC: pyelonephritis
muddy/brown: ATN
waxy: CKD
hyaline: normal
lab findings of intrinsic ARF/AKI
urine SpGr: < 1.010
Bun/Cr: < 10
Urine Osm: < 300
tx for intrinsic AKI
IVF
+/- diuretics
mcc of obstructive/postrenal AKI
BPH
4 all causes of postrenal AKI
BPH
stones
tumors
congenital abnl
tx for postrenal AKI
catheter
US
remove obstruction vs fix abnl
US finding of postrenal AKI
hydronephrosis
3 types of intrinsic AKI
ATN
interstitial nephritis
glomerulonephritis
causes of ATN
ischemia
toxins
why is FENa elevated with ATN
damaged tubules can concentrate urine
what is FENa
fractional excretion of sodium
FENa < 1% suggests _
FENa > 1% suggests _
< 1%: prerenal
> 2%: ATN
lab findings associated w. ATN
FENa: >2%
urinary sodium: >40
BUN/Cr: <20
Urine osmo: <350
mcc of ATN
prerenal failure
5 drugs associated w. ATN
amp B
cisplatin
aminoglycosides
nsaids
ACEI
ATN triad
FENa > 2%
muddy brown casts
low urine Osm
interstitial nephritis triad
wbc casts
eosinophilia
hematuria
interstitial nephritis is caused by a _ reponse
immune mediated
5 drugs associated w. interstitial nephritis
5 p’s:
pee (diuretics)
pain free (nsaids)
pcn’s/cephalosporins
ppi’s
rifamPin
dx for interstitial nephritis
renal bx
management of interstitial nephritis
usually self limited
steroids
+/- dialysis
3 types of GN
IgA nephropathy
postinfectious
membranoproliferative
GN triad
hematuria
htn
periorbital edema
also: oliguria, hematuria, RBC casts
4 causes of GN
GAS
IgA
anti-GBM
ANCA
mcc of acuteGN
post streptococcal: skin vs pharyngitis
ckd is defined as ongoing loss of kidney fxn w. GFR < _ for _ months
60
3 months
gs dx for ckd
cockroft gault
3 causes of ckd
DM
HTN
GN
5 sx of CKD
fatigue
pruritis
kussmaul respirations
asterixis
muscle wasting
what stage ckd indicates need for dialysis
4
bp goal for ckd pt
130/80
all ckd pt’s should be on what med for bp control
ACEI or ARB
lab findings for ckd (3)
hypocalcemia
hyperphosphatemia
metabolic acidosis
62 yo M w. sudden onset fever and rash - recently started omeprazole - labs: SCr 3.5, eosonophilia, WBC casts
acute interstitial nephritis
2 drugs to avoid in pt’s w. BPH
anticholinergics
antihistamines
t/f: BPH is a precursor to prostate ca
f!
PE finding of BPH
enlarged rubbery prostate
PSA < _ is associated w. BPH
4
lifestyle management of bph (2)
decrease nighttime fluids
avoid caffeine/etoh
3 classes of bph meds
-alpha adrenergic receptor blockers: terazosin, tamsulosin
-5 alpha reductase inhibitors: finasteride
-phosphodiesterase-5 enzyme inhibitors: tadalafil
which prostate med decreases DHT synthesis and actually reduces prostate gland size
5 alpha reductase inhibitors: finasteride
what is DHT
dihydrotestosterone
moa for terazosin/tamsulosin
decrease prostate/bladder/urethral muscle tone
moa for tadalafil
induce smooth m relaxation
what surgery is used for bph
TURP (transurethral resection of the prostate)
2 s.e of TURP
sexual dysfxn
urinary incontinence
smoker w. gross hematuria
bladder ca
mc type of bladder ca
transitional cell carcinoma
gs dx for bladder ca
cystoscopy w. bx
tx for bladder ca
surgery
biologics
chemo
25 yo M w. a few days of gradually worsening dull, achy scrotal pain, dysuria, and a swollen right testicle - UA positive for leuks
epididymitis
unilateral swollen testicle w. induration
epididymitis
epididymitis is acquired by
retrograde spread of organisms through the vas deferens
mcc of epididymitis based on age
men < 35: CT/GC
men > 35: e. coli
epididymitis pain radiates to the
ipsilateral flank
what PE sign is associated w. epididymitis
prehn sign: pain w. relief of scrotal elevation
tx for epididymitis (3)
bed rest
scrotal elevation
analgesics
abx
abx for epididymitis based on age
< 35: ceftriaxone + doxy
> 35: levofloxacin vs bactrim
6 causes of ED
psychological
HTN
DM
hormonal dysfxn
meds
nocturnal penile tumescence
tx for ED
wt loss
smoking/etoh cessation
hormone replacement
vacuum erection devices
surgery
what ed med should you never use with nitrates due to risk of life threatening hypotn
pde 5’s: tadalafil, vardenafil, sildenafil
damage of renal glomeruli by deposition of inflammatory proteins in glomerular membranes as a result of immunologic response
glomerulonephritis
what lab is elevated in a majority of PSGN cases
antistreptolysin-O titer
is serum complement increased or decreased w. GN
decreased
tx for GN
steroids
immunosuppressants
decrease salt/fluids
+/- dialysis
fluid filled sac around a testicle
hydrocele
hydrocele is mc in what 2 pt pops
newborns
older men
PE finding of a hydrocele
mass transilluminates
tx for hydrocele
obs
usually self resolves
4 causes of hydronephrosis
blockage in the ureter:
stone
bph
blood clot
tumor
6 causes of hypervolemia
iatrogenic
CHF
nephrotic syndrome
cirrhosis
ESR
hypoalbuminemia
5 PE findings associated w. hypervolemia
weight gain
peripheral edema
ascites
JVD
pulmonary rales
gs dx for fluid status
pulmonary a catheter (swan-ganz) to measure CVP
causes of hypovolemia
decreased thirst
GI/urinary fluid loss
burns
diuretics
osmotic diuresis
hyperglycemia
sodium excess
diabetes insipidus
PE findings associated w. hypovolemia
weakness/fatigue/apathetic
tachycardia
postural hypotn
dry mm
decreased skin turgor
hypothermia
pale extremities
oliguria
2 types of diabetes insipidus
neurogenic (central)
nephrogenic
neurogenic diabetes insipidus is caused by
deficient vasopressin/ADH secretion from post pit
nephrogenic diabetes insipidus is caused by
unresponsive kidneys to normal ADH levels
3 causes of nephrogenic diabetes insipidus
inherited x linked
lithium
renal dz
hallmark finding of diabetes insipidus
urine osmo < 250 in setting of hypernatremia
management of diabetes insipidus
isotonic fluid bolus (NS vs LR)
replace blood loss w. crystalloid
maintenance D5/NS + KCl
goal urine output for diabetes insipidus
0.5-1.0 mL/kg/hr
consequence of rapid fluid replacement w. diabetes insipidus
pulmonary edema
basic difference between nephrotic vs nephritic syndrome
nephrotic: protein loss
nephritic: blood loss
nephritic syndrome is caused by
inflammation that damages the glomerular basement membrane
hallmark finding of nephritic syndrome
hematuria
RBC casts
3 sx of nephritic syndrome
low urine output
sodium retention -> htn
peripheral/periorbital edema
4 lab findings of nephritic syndrome
elevated BUN/Cr
hematuria
proteinuria
RBC casts
dx for nephritic syndrome (2)
24 hr urine protein collection: < 3.5 g/day
renal bx
3 different classes of nephritic syndrome causes
type III hypersensitivity
multifactorial
alport syndrome
3 type III hypersensitivity causes of nephritic syndrome
PSGN
diffuse proliferative GN (SLE)
IgA (berger’s dz)
2 multifactorial causes of nephritic syndrome
menbranoproliferative GN (MPGN)
rapidly progressive GN (RPGN)
what cause of nephritic syndrome is associated w. collagen synthesis
alport syndrome
management of nephritic syndrome
salt/fluid restriction
ACEI/ARB
IgA: steroids
RPGN: immunosupressants
PSGN: ccs instead of ACE/ARB
inflammation of the kidneys that may involve glomeruli, tubules, or interstitial tissue surrounding glomeruli and tubules
nephritis
mcc of nephritis
AI
nephritis caused by inflammation from a UTI that reaches the renal pelvis
pyelonephritis
otherwise healthy 45 yo M w. painless hematuria x 3 days - no PMH stones or UTIs - fam hx of htn at a young age - PE positive for bilat non tender flank masses
ADPCKD (autosomal dominant polycystic kidney dz)
ADPCKD is caused by a mutation of what gene
PKD1/PKD2
ADPCKD involves numerous cysts in the kidneys made of
epithelial cells from renal tubules
sequale of ADPCDK
kidney failure/ESRD
classic presentation of ADPCKD
young
back/flank pain
htn
3 cardiac complications associated w. ADPCKD
brain aneurysms
MVP
LVH
what is this showing
multiple fluid filled cysts -> ADPCKD
management of ADPCKD
no cure -> supportive
ACEI/ARB
dialysis/transplant
mc location for prostate ca
peripheral zone
PE finding of prostate ca
DRE: hard, irregular, nodular prostate
PSA > 4 makes you think of (3)
bph
prostate ca
prostatitis
prostate ca screening recs
55-69 yo: +/- annual PSA
>70: USPSTF recommends against screening
2 indications for TRUS (transrectal US)
PSA > 10, regardless of DRE findings
abnormal DRE, regardless of PSA
management of PSA <4.0-10.0
<4.0: PSA annually based on pt preference
4.1-10.0: bx
ascending infxn of gram negative rods into prostatic ducts
prostatitis
presentation of acute prostatitis
sudden onset:
f/c
lbp
frequency/urgency/dysuria/obstruction
presentation of chronic prostatitis
irritative bladder symptoms/obstruction
+/- other symptoms
all forms
prostatic fluid findings associated w. prostatitis
leukocytosis
acute: e.coli
chronic: enterococcus
what PE exam is contraindicated if you suspect prostatitis
DRE -> can lead to sepsis!
pathogen associated w. prostatitis: < 35 vs > 35
< 35: CT/GC
> 35: e.coli, pseudomonas
tx for prostatitis: < 35 vs > 35 vs chronic
< 35: ceftriaxone PLUS doxy
> 35: fluoroquinolones vs bactrim, test of cure
chronic: fluoroquinolones vs bactrim x 6-12 weeks
what should you do if fever w. prostatitis hasn’t resolved w.in 36 hr
suspect abscess -> consult urology
organism mc associated w. pyelonephritis
e.coli
tx for pyelo: outpt vs inpt
outpt: FQ vs bactrim x 1-2 weeks
inpt: IV FQ vs 3rd/4th gen cephalosporins vs gentamicin
colicky flank pain radiating to the groin, hematuria, n/v
nephrolithiasis
gs dx for nephrolithiasis
abd/pelvis spiral CT w.o contrast
4 types of kidney stones
calcium oxalate - mc
struvite
uric acid
cystine
what condition do calcium oxalate stones make you think of
hyperparathyroidism
what beverage should pt’s w. calcium oxalate stones avoid
grapefruit juice
what type of kidney stone is associated w. chronic UTI
struvite
what 2 pathogens do struvite stones make you think of
klebsiella
proteus
young boy with kidney stones probs has what type of stone
cystine
general management of kidney stones
outpt for most
analgesia
hydration
abx if UTI
alpha blockers (tamsulosin)
+/- lithotripsy
3 indications for hospitalization w. kidney stones
refractory pain despite meds
anuria
UTI and/or fever
you should consider lithotripsy for stones > _ mm
5
gs management of kidney stones > 10 mm
nephrostomy
can also consider stent
renal cell carcinoma triad
hematuria
flankl pain
palpable abd mass
2 mc types of renal cell carcinoma
1. clear cell
2. transitional cell
rf to know for renal cell carcinoma
smoking
dx for renal cell carcinoma
- US vs CT
- bx
tx for renal cell carcinoma
nephrectomy
narrowing of one or both renal arteries mc caused by atherosclerosis or fibromuscular dysplasia
renal artery stenosis
presentation of renal a stenosis
<30 yo
HTN + CAD/PVD
HTN resistant to 3+ drugs
pt placed on ACEI who develops acute renal failure or a sharp rise in BUN/Cr
renal a stenosis
dx for renal a stenosis: initial vs gs
initial: US
gs: renal arteriography
tx for renal a stenosis
percutaneous transluminal angioplasty (PTA) PLUS stent vs bypass
15 yo M w. severe/sharp lower abd pain radiating to left thigh - associated vomiting - no f/c or dysuria - single elevated left testis that is diffusely tender
testicular torsion
what is the bell clapper deformity
bilat nonattachment of the testicles by the gubernaculum to the scrotum
how much time do you have to detorse a testicle
ideally: <6 hr
>24 hr = < 10% chance of salvaging testicle
how would you differentiate btw torsion and epididymitis on PE
epididymitis: (+) prehn sign
torsion: absent cremaster reflex
what is this showing
blue dot sign -> tender nodule on upper pole -> torsion
PMH clue for torsion
cryptochordism
management of testicular torsion
emergency surgery
elective surgery for contralateral teste
UTI is infection of
kidneys, bladder, or urethra
mc pathogen associated w. UTI
e.coli
gs dx for UTI
urine culture
tx for UTI
uncomplicated: nitro, bactrim, fosfomycin
complicated: cipro
postcoital: bactrim vs keflex, single dose
pregnant: nitro vs keflex
hunner’s ulcer on cystoscopy
intersitial cystitis
UTI symptoms that are relieved w. voiding
interstitial cystitis
enlargement of the veins w.in the scrotum
varicocele
what is this showing
varicocele
varicocele involves dilation of the _ plexus
pampiniform
2 causes of varicocele
poorly functioning valves
vein compression
if a varicocle is symptomatic, how may it present
low sperm production/quality -> infertility
how does a varicocele look on PE
bag of worms
varicocele is worse when the pt is _ and relieved when the pt is _
worse: upright
relieved: supine
varicocele is mc on what side
left
tx for varicocele
surgery if symptomatic