Renal Flashcards
Indications for dialysis in acute renal failure?
Hyperkalaemia (>6.5 of with ECG changes)
Acidosis pH <7.1
Refractory pulmonary oedema
Severe symptomatic uraemia
Uraemic pericarditis
Basic driver for NAGMA?
Loss of bicarb
Basic driver for HAGMA?
Exogenous source of acid in the plasma
NAGMA causes?
RTA
Diarrhoea
Acetazolamide
Ureteric diversion
HAGMA causes?
MUDPILES (5 are poison)
Methanol poisoning
Uraemia
DKA
Paraldehyde poisoning
Iron poisoning
Lactic acidosis, liver failure
Ethylene glycol poisoning
Salicylate poisoning
3 most accurate lab measurements of GFR?
Insulin clearance
Chromium-labelled EDTA
Iohexol
Loop diuretic site of action?
Ascending arm of LoH
Compete for chloride-binding sites
Site of action of thiazides?
Distal tubule
Compete for chloride-binding sites
Where do trimethoprim, cimetidine and many diuretics enter the tubular filtrate?
Proximal tubule
Spironolactone site of action (aldosterone receptors)?
Distal tubule AND collecting duct
Where does lithium enter the filtration system? (and sometimes hence cause NDI)
Collecting duct
Non-renal causes of proteniuria?
Fever
Severe exercise
Skin disease
UTI
Tubular cells casts in urine microscopy?
ATN or interstitial nephritis
Hyaline casts in urine microscopy?
Tamm-Horsfall glycoprotein (NORMAL)
Granular casts in urine microscopy?
Non-specific
Red cell casts in urine microscopy?
GN or tubular bleeding
Leukocytes casts in urine microscopy?
Pyelonephritis or ATN
Potential SE of MRA?
Nephrogenic systemic fibrosis - use MRA with caution in eGFR <30
Type 1 vs type 2 RTA
Type 1 = distal (far more common than type 2 (proximal)
Contrast nephropathy time to onset?
2-5 days
Diabetic Nephropathy Stages?
HS2MP (High Speed 2 Manchester Picadilly)
Hyper (High): Stage 1
Silent (Speed 2): Stage 2
Microalbumin (Manchester): Stage 3
Proteinuria (Picadilly): Stage 4
Most common peritoneal dialysis organism?
Staph epidermis
Post-step GN vs IgA nephropathy post URTI?
Post-strep GN is 1-2 weeks (post is well post)
IgA more rapid, 1-2 days (A comes first)
Creatinine rise in 48 hours for AKI?§>26
26
Which test is most useful when determining whether there is prerenal uraemia or acute tubular necrosis?
Urinary sodium
Intensely painful, purpuric patches with an area of black necrotic tissue that may form bullae, ulcerate, and leave a hard, firm eschar in the context of kidney disease?
Calciphylaxis
3 factors affecting traditional eGFR result?
Red meat
Pregnancy
Muscle mass (e.g. amputees, body-builders)
Components of MDRD equation for eGFR?
Creatinine
Age
Ethnicity
Gender
/Cranial causes of DI
Idiopathic
Head injury
Pituitary surgery
Craniopharyngiomas
Infiltrative
Histiocytosis X
Sarcoidosis
DIDMOAD is the association of cranial Diabetes Insipidus, Diabetes Mellitus, Optic Atrophy and Deafness (also known as Wolfram’s syndrome)
Haemochromatosis
Wolfram’s sydrome?
DIMOAD
Cranial DI
Diabetes
Optic atrophy
Deatness
Rapid worsening of renal function on introduction of an ACEi? (often presents with flash pulmonary oedema)
What is the gold standard Ix according to the latest NICE guidelines
Renal artery stenosis
MRA
How does calcium resonium work?
Decreases enteral absorption of potassium to increase excretion
Nephrotic syndrome patient who develops flank pain and haematuria?
Renal vein thrombosis
BPH management?
First line A-1 e.g. tamsulosin
Second line 5 alpha reductase e.g. finasteride
Staghorn composition?
Struvite (ammonium magnesium phosphate)
AMP
Mechanical valves INR?
aortic: 3.0
mitral: 3.5
Prevention of oxalate stones?
cholestyramine or pyridoxine
Prevention of calcium stones?
Thiazide
Time to use for AV fistula?
6-8 weeks
Why are you hypercoaguable in nephrotic syndrome?
Loss of antithrombin III
Most common cause of GN?
IgA nephropathy
Does IgA progress to ESRF?
25% do
Histology of IgA?
Mesangial proliferation
IgA complex deposition
Elevated complement
(remember this is also seen in HSP)
How do you differentiate between IgA and HSP given that the histology is the same?
HSP affects multiple systems, IgA only kidneys
What do you need to give alongside gosrelin for prostate Ca?
Cyproterone acetate
What is Tolvaptan used for and how does it act?
ADPKD
Vasopressin 2 receptor antagonist
Effacement/fusion of podocytes?
Minimal change disease
(you can only see this on electron microscopy however hence minimal change)
Nephrotic syndrome in children? What do you do? Second line treatment?
Assume minimal change
Give steroids
Cyclophosphamide
Driver of minimal change?
Cytokine driven damage to the podocytes allowing leakage
Prognosis in minimal change?
Overall good
1/3 one episode
1/3 infrequent relapses
1/3 frequent relapses which stop before adulthood
Androgen receptor blocker used in prostate Ca?
Bicalutamide
Antibodies in primary membranous GN?
anti-PLA2R
Alcohol induced polyuria mechanism?
Anti-diuretic hormone (ADH) suppression in the posterior pituitary gland
Most likely renal outcome of HSP?
Full recovery
1/3/ have a relapse
Renal, eye disease and deafness?
Think alports
Anterior lenticonus?
Alports
Type of collagen deficiency in Alport’s?
Type IV
Inheritance in Alport’s (most commonly)?
X linked dominant
Splitting of the macula densa and “woven-basket appearance”?
Alport’s
Gene in Alport’s?
COL4A
Bladder Ca RFs
Smoking
Exposure to aniline dyes
- for example working in the printing and textile industry
- examples are 2-naphthylamine and benzidine
Rubber manufacture
Cyclophosphamide
Risk factors for squamous cell carcinoma of the bladder include:
Schistosomiasis
Smoking
Vitamin D supplementation in advanced CKD?
Alfacalcidol
Congo red staining: apple-green birefringence?
Amyloid
Unwell patient, triad of pulmonary haemorrhage, GN, anti-GBM antibiodies
Anti-GBM disease (Goodpasture’s)
Most common form of PKD?
PKD1
Chromosomes affected in ADPKD?
PKD1 - 16
PKD2 - 4
Dialysis-related amyloid?
B2 microglobulin amyloid
Presents like PMR with carpal tunnel
Where is EPO produced?
Interstitial fibroblasts in the renal cortex
Untreated UTI in a diabetes who then presents with obstructive symptoms?
Renal papillary necrosis
Small calculi in the papillary zones with surrounding increased density on excretion urography?
Medullary sponge kidney
Peritoneal dialysis patient with sepsis but dialysis culture shows lots of organisms including anaerobes?
Think bowel perf
Bone minerals in CKD
High - phosphate
PTH
Low - Calcium
Vitamin D
Most important HLA to match for transplant?
DR
(directly relevant)
Ig responsible for hyperacute graft rejection?
IgG
Idiopathic membranous GN (typical in middle aged person presenting with nephrotic syndrome) antibody?
Antiphospholipase A2
Spike and dome appearances on renal biopsy? Subendothelial deposits?
Membranous GN
ADPKD, which type is more common?
Type 1 (85%)
Chromosome abnormalities in ADPKD?
Type 1 - chromosome 16
Type 2 - chromosome 4
(there are more of type 1)
Treatment sometimes used in ADPKD?
Tolvaptan (vasopressor receptor 2 antagonist)
GPA history and nephritic syndrome biopsy findings?
Crescentic GN
Electrolyte side effect of plasma exchange?
Hypocalcaemia
Biopsy findings in Goodpastures?
IgG deposition (linear)
Sounds like Conn’s but HIGH plasma renin?
Bilateral RAS
Associations of IgA nephropathy (other than URTI)?
Alcohol cirrhosis
IBD
HSP
Treatment in severe HUS?
Plasma xchange
Heroin use and GN?
Focal segmental GN
Most common cardiac feature in ADPKD?
Mitral prolapse
CMV treatment post transplant?
Ganciclovir - severe
Valaciclovir/valganciclovir - mild
PJP treatment post renal transplant?
Co-trim
Sounds like Conns, normotensive, hypokalaemic, high renin and aldosterone BUT low magnesium?
Gitelman syndrome
Renal biopsy in HIV nephropathy?
Focal segmental glomerulosclerosis with collapsed tuft and tubuloreticular structures
Most important function of proximal convoluted tubule?
Sodium reabsorption
GN in partial lipodystrophy?
Mesagiocapillary type 2
Mesangiocapillary GN associatons?
Partial lipodystrophy (type II)
Hep C
Focal segmental glomerulosclerosis associations
Diabetes
Heroin use
HIV
Goodpasture HLA assoc?
DRB1
Anti rejection med causing hyperkalaemia?
Tacrolimus
Timing of CMV/EBV post transplant?
CMW around 6 weeks post
EBV around 6 months post
Familial renal cancer?
VHL
Cast nephropathy vs light chain deposition disease in myeloma
Cast often severe and irreversible renal damage, progressive with Bence Jones proteinuria AND NORMAL ALBUMIN
Light chain deposition often mild dysfunction with significant albuminuria
Renal amyloidosis AL - nephrotic syndrome with mild impairment and lamda deposition on the membrane