GU conditions Flashcards
where do kidney stones (nephroliathiasis) form and what are 90% of them made of
stones form in renal pelvis + travel down to ureters
90%= calcium oxalate stones (radio-opaque)
other types=
calcium phosphate
uric acid (radiolucent therefore not seen on x-ray)
struvite (made by bacteria)
cystine
list 8 risk factors for kidney stones
male
chronic dehydration
obesity
high protein/salt diet
recurrent UTIs
low urine output
hyperparathyroidism/hypercalcaemia
Hx of previous stone
pathology of kidney stones
excess solute in dehydration= supersaturated urine> favours crystallisation
-stones cause regular outflow obstruction= hydronephrosis
-dilation + obstruction of renal pelvis= damage
presentations of kidney stones
pain originating @ loin, radiating 2 groin that is colicky, peristaltic waves
patient can’t lie still
haematuria
n+v
decreased urine output
1st line investigations for kidney stones (4)
urine dipstick- haematuria, leukocytes, nitrates
FBC- CRP (infection)
U&Es- hypercalcaemia
abdo x-ray- Ca stones (no uric acid stones as radiolucent)
gold standard investigation for kidney stones
non-contrast CT KUB (kidney, ureter, bladder)- presence of stones
non-contrast bc contrast needs to be excreted by kidneys and therefore is harmfulf is there is a renal obstruction
symptomatic management of kidney stones
symptomatic relief= hydration, NSAIDS (diclofenac), antiemtics, Abxs if UTI eg gentomycin
watchful waiting- stones <5mm norm pass spontaneously
elective treatment of kidney stones
elective treatment if stones= too big
-extracorpeal shock wave therapy (ESWL- break stones into smaller fragments using shock waves)- smaller stones <20mm
-percutaneous nephrolithotomy (PCNL- use nethoscope to remove stone) larger than 20mm+
-ureteroscopy & laser lithotripsy
lifestyle modifications for managing kidney stones
decrease sodium & protein intake
increase citrus fruit
adequate fluid intake
define an acute kidney injury (AKI)
AKI= sudden decline in kidney function determined by increased serum creatinine and decreased urine output
what is the KDIGO classification for AKI
rise in creatinine of >26 micromol/L within 48 hrs
OR
rise in creatinine of >50% from baseline within 7 days
OR
urine output of <0.5 ml/Kg/hr for >6hrs
what is pre renal AKI and what causes it
prerenal= inadequate blood supply to the kidneys
causes:
dehydration
hypotension (shock)
heart failure
renal artery blockage
drugs (NSAIDS + ACEi)
decreased blood vol> decreased perfusion> decreased GFR + creatinine clearance
what is intra renal AKI and what are its causes
intrinsic disease/damage to the kidney causing reduced filtration
causes:
acute tubular necrosis
glomerulonephritis
interstitial nephritis
toxins (sepsis)
kidney damage> decreased oncotic + hydrostatic pressure = decreased GFR
what is post renal kidney disease and what are its causes
obstruction to outflow of urine= back pressure + decreased function (obstructive uropathy)
causes:
kidney stones
cancerous masses
ureter/urethra strictures
enlarged prostate/prostate cancer
drugs (anticholinergic, CCBs)
obstruction>back pressure 2 kidney> decrease in hydrostatic pressure> decrease in GFR
a decrease in GFR leads to a build of which normally excreted products (5)
creatinine
K+ (arrhythmias)
urea (confusion, uraemia)
fluid (oedema)
H+ (acidosis)
list 5 risk factors for an AKI
increasing age
co-morbidities (HTN, T2DM, chronic heart failure)
hypovolemia
nephrotoxic drugs (ACEi. NSAIDS)
cirrhosis/already have kidney problems
presentation of an AKI
due 2 substance accumulation:
increase in creatinine, decreased urine output
hyperkalaemia (arrhythmias, musc weakness)
uraemia (pericarditis, n+v. encelopathy)
fluid overload (pulmonary + peripheral oedema, hypovolemic shock, orthopnoea)
HTN
sepsis/acute illness
list signs of an AKI for pre, intra and post renal
pre= hypotension, syncope, d+v
intra= infection, signs of underlying disease
post= LUTS + low urine output
list symptoms of an AKI
n + v
fever + dizziness
altered mental state
investigations for an AKI
establish cause (pre/intra/post) + diagnose using KDIGO classification
use urea:creatinine ratio
pre= >100:1
intra= >40:1
post= 40-100:1
metabolic panel and urine output monitoring
-check K+, H+, urea, creatinine w U&Es
urinalysis: leukocytes + nitrites= infection
renal biopsy> to confirm intrarenal cause
USS for post renal
1st line management of an AKI
1st=
treat underlying causes
stop nephrotoxic drugs (ACEi + NSAIDS)
treat comps:
-hyperkalemia= Ca gluconate
-metabolic acidosis= Na bicarb
-fluid overload= diuretics
management of severe AKI
severe=
renal replacement therapy
-haemodialysis
indicated in AFUK
Acidosis
Fluid overload
Uremia
K+ >6.5/ECG changes
define chronic kidney disease (CKD)
chronic reduction in kidney function which is permanent + progressive >3months
what are the diagnostic criteria for CKD
eGFR <60 ml/min/1.73m2 for 3+ months (norm= 120)
OR
eGFR <90ml/min/1.73m2 + signs of renal damage
OR
albuminuria (albumin in urine)>30mg/24hrs
list 4 risk factors for CKD
DM + HTN (mc)
male
increasing age
smoking
describe the pathology of CKD
many nephrons damaged= a decrease in GFR- this increases the burden on the remaining nephrons
- compensatory RAAS to increase GFR
BUT:
increase in transglomerular pressure= shearing + loss of basement membrane permeability- causes proteinuria/haematuria
list 5 signs of CKD
asymptomatic until end stage
Sxs due to substance accumulation + renal damage
haematuria
proteinuria
peripheral neuropathy
HTN
oedema
list 6 symptoms of CKD
pruritis
loss of appetite
nausea
musc cramps
pallor
fatigue
investigations for CKD (4)
FBC- anaemia of chronic disease
U&E- GOLD for estimated eGFR function. (diagnostic)
urine dip (proteinuria)
GFR func. staging 1-5
describe eGFR function staging 1-5
uses 4 parameters:
creatine, age, gender, ethnicity
- 90+ w. renal signs
- 60-90 w. renal signs
- a. 45-59 b. 30-44
- 15-29
- <15
highest score= well functioning kidneys
lowest= most severe kidney damage
management of CKD
no cure so treat comps:
-anaemia= ferrous sulphate + erythropoietin
-oedema= diuretics
-metabolic acidosis= Na bicarb
-osteodystrophy= vit D supps
-CVD= ACEi + statins
end stage= renal replacement therapy (eGFR<15) dialysis
eventually- kidney transplant= cure
AKD vs CKD
AKD=
-increase in serum creatinine + decrease in urine output
-shorter Sx onset
-no anaemia
-USS= normal
CKD=
-decrease in eGFR
-3+ months Sx onset
-anaemia of CKD
-USS= bilateral, small, abnormal kidneys
describe benign prostate hyperplasia (BPH)
non-malignant hyperplasia of stromal + epithelial cells of prostate- causes enlarged prostate which partially blocks urethra
list 5 risk factors for BPH
increasing age
increase in testosterone (castration= protective)
FHx
smoking
non-asian
presentation of BPH
what is used to assess these symptoms
LUTS- lower urinary tract symptoms
STORAGE:
frequency, urgency, incontinence, nocturia
VOIDING:
dysuria, poor/intermittent stream, dribbling, straining, incomplete emptying, hesitancy
IPSS (international prostate symptom score) used to assess severity of LUTS
investigations for BPH (including GOLD)
GOLD= DRE- smooth but enlarged prostate (prostate cancer= hard + irregular)
-prostate specific antigen raised (v. unreliable as can be raised in cancer as well)
-urine frequency volume chart
-urine dipstick (rule out infection)
management of BPH
lifestyle- reduce caffeine/alcohol intake
1st= alpha blockers eg tamsulosin (relaxes smooth musc in bladder neck + prostate)
2nd= 5-alpha reductase inhibitors eg finasteride (blocks conversion of testosterone to dihydrotestosterone which decreases prostate size)
surgery= last resort- TURP, transurethral resection of prostate
describe renal cell carcinoma + list 4 risk factors for it
adenocarcinoma rising from PCT
mc. of renal cancer
RFs:
smoking
obesity
hereditary
von hippel-lindau (autodom loss of tumour suppressor gene)
presentations of renal cell carcinoma (including a triad)
triad=
1. haematuria
2. flank pain
3. palpable mass
may have L varicocele
cancer symptoms= wt. loss, fatigue, anorexia, night sweats
1st line and gold standard investigations for renal cell carcinomas
1st=
bloods= increased: RBCs, Ca, LDH (lactate dehydrogenase)
abdo/pelvis USS
GOLD= CT chest/abdo/pelvis
management of renal cell carcinomas
nephrectomy/partial nephrectomy
define bladder cancer and give the mc. subtype of bladder cancer
cancer in bladder arising from urothelium
mc. subtype= transitional cell carcinoma
Risk factors for bladder cancer
occupational exposure to dyes/paints/rubber (aromatic amines)
-painter
-hairdresser
-mechanic working w. tyres
-dye factory worker
age 65+
male
caucasian
smoking
pelvic radiation
presentations of bladder cancer
painless haematuria (macro or microscopic)
urgency
dysuria
suprapubic/pelvic mass
pelvic pain
recurrent UTI
signs of metastases: bone pain, wt. loss
1st line and GOLD investigations for bladder cancer
1st=
urinalysis 4 microscopy + culture
bladder USS
GOLD= flexible cystoscopy + biopsy
management of bladder cancer
conservative= support eg specialist nurse
medical= chemo/radio
surgical= TURBT (transurethral resection of bladder tumour)
last resort= cystectomy (bladder removal)1
where does prostate cancer develop
peripheral zone of the prostate
-mc. cancer in men + v. slow growing
list 5 risk factors for prostate cancer
genetic- BRCA2, HOXB13
FHx
increasing age
afro-caribbean
anabolic steroids
what are lower urinary tract symptoms (LUTS)
STORAGE: need to pee
-frequency
-urgency
-nocturia
-incontinence
VOIDING: hard 2 pee
-poor stream
-incomplete emptying
-hesitancy
-need 2 pee
presentation of prostate cancer
where does it typically metastasise to
LUTS (like BPH) but w. systemic cancer symptoms (wt. loss, fatigue, night pain) + bone pain
haematuria
erectile dysfunction
typically metastasises to bone (thick sclerotic lesions), liver, lungs & brain
1st line investigations for prostate cancer
DRE + prostate exam- firm + hard + asymmetrical + rough
test for prostate specific antigen in community setting - increased
gold standard investigation for prostate cancer + grading system
transrectal USS + biopsy
Gleason grading system- based on biopsy
- higher score= worse prognosis
management of prostate cancer in a local setting
prostatectomy if <70
active surveillance if 70+
external beam radiotherapy
brachytherapy
management of prostate cancer that has metastasised
chemo/radio
bilateral orchidectomy (GOLD hormonal treatment)
androgen deprivation therapy
palliative care 2 relieve symptoms eg TURP
where does testicular cancer arise from and list the germ and non-germ cell cancers
cancer arising from germ cells in the testes
-90% germ cell cancers (semimomas, teratomas)
-10% non-germ cell cancers (leydig, sertoli, lymphoma)