renal medicine Flashcards
what is erythropoietin?
- growth factor
- stimulates production of erythrocytes
When is Erythropoietin secreted?
- secreted by kidney
- in response to cellular hypoxia
Alport syndrome is due to…
- defecet in gene coding for type IV collagen
- results in an abnormal glomerular basement membrane
medical condition involving the death of tubular epithelial cells that form renal tubules of kidney
acute tubular necrosis
what might be seen in urinalysis of a patient with acute tubular necrosis
‘muddy brown casts’
high K+
deranged renal function
causes of AKI are divided into what three categories
Prerenal : ishcaemia
Intrinsic : toxins
Post renal : obstruction, backing up
Pre-renal causes of AKI
ISCHAEMIA
- hypovolaemia secondary to diarrhoea / vomiting
- renal artery stenosis
Intrinsic causes of AKI
glomerulonephritis
acute tubular necrosis (ATN)
acute interstitial nephritis
rhabdomyolysis
tumour lysis syndrome
post renal causes of AKI
- kidney stone in ureter or bladder
- benign prostatic hyperplasia
- external compression of ureter
what is a recognised cause of diabetes insipidus ?
- lithium
- lithium desensitizes the kidneys ability to respond to ADH in the collecting ducts
- demeclocycline
what is antithrombin III?
- protease
- inhibits coagulation by inhibiting activity of thrombin
- nephrotic syndrome associated with a loss of antithrombin III
31 y/o male
- has ongoing renal condition
- suffers haematuria and loin pain
- caused his underlying anaemia
- numerous echogenic spaces in kidneys
- mother had condition
indicative of:
autosomal dominant polycystic kidney disease
most common extra-renal manifestation of ADPKD is :
liver cysts
20 y/o female
pc: 5 day hx painless light brown urine. 3 episodes over 5 days.
no dyspareunia, urgency or pain.
afebrile
pmh: previous URTI
urine dip: positive for ketones and blood
indicative of:
post streptococcus glomerulonephritis
symptoms, previous illness and proteinuria point to PSGN
post streptococcus glomerulonephritis is caused by:
immune complex (IgG, IgM and C3) deposition in the glomeruli.
Alport’s syndrome characterised by:
- haematuria
- sensory hearing loss
- ocular disturbances
Causes of a normal anion gap metabolic acidosis are ABCD:
Addisons
Bicarb loss
Chloride
Drugs
obesity hypoventilation will cause what type of respiratory picture
respiratory acidosis
describe some complications of nephrotic syndrome?
- increased VTE risk
- increased risk of infections
- cardiovascular complications
- anaemia
- acute renal failure
- hypovolaemic crisis
triad of nephrotic syndrome
- proteinuria ( > 3g/24hr)
- hypoalbuminaemia ( < 30g/L)
- oedema
why does nephrotic syndrome predispose an increased risk of VTE?
- loss of anti-thrombin-III, proteins C and S
- an associated rise in fibrinogen levels
- both predispose to thrombosis