Renal Flashcards
Features of Alport’s syndrome
Microscopic haematuria
Sensorineural deafness
Radio-opaque renal stones
Calcium oxalate
Calcium phosphate
Mixed calcium oxate/phosphate
Struvite (triple phosphate)
Radio-lucent renal stones
Urate
Xanthine
Semi-opaque renal stones
Cystine
AKI stage I - by creatinine
1.5-1.9X baseline
or
Increase >26.5
AKI stage I - by urine output
<0.5ml/kg/hr for 6-12 hrs
AKI stage II - by creatinine
2.0-2.9X baseline
AKI stage II - by urine output
<0.5ml/kg/hr for =>12 hrs
AKI stage III - by creatinine
3.0X baseline or Increase => 353.6 or started renal replacement
AKI stage III - by urine output
anuria =>12 hrs
Drugs associated with retroperitoneal fibrosis
Bromocriptine
Beta-blockers
Methysergide
Drugs which exacerbate calciphylaxis
Warfarin
Calcium containing compounds
IgA nephropathy (Berger’s disease) presentation
1 -2 DAYS after URTI
Macroscopic haematuria
Young people
Patient with CKD - when start investigating for anaemia
Hb falls below 110 OR if symptomatic
AKI with ‘allergic’ features (fever, rash, IgE, eosinophils)
Acute interstitial nephritis (AIN)
Commonest causes of nephrotic syndrome
MMF:
Minimal change disease
Membranous nephropathy
Focal segmental glomerulosclerosis
Urine sodium in pre-renal AKI
Low <20 mmol/L
24 hr protein excretion in nephrotic syndrome
> 3g/24hr
Urine microscopy findings in acute tubular necrosis (ATN)
Granular casts + renal epithelial cells
Renal biopsy findings in focal segmental glomeruloscerosis
Scarring ‘sclerosis’ and effacement of foot processes
Indications for plasma exchange in ANCA-associated vasculitis
Rapidly progressive renal failure
Pulmonary haemorrhage
anti-GBM disease
Management of IgA nephropathy (Berger’s disease)
Observation
Consider ACEi if significant HTN or high creatinine
Definition of microalbuminuria
Albumin:creatinine ratio >2.5
Medication to reduce recurrence of calcium stones
Thiazides
Infectious causes of membranous glomerulonephritis
Hep B
Malaria
Syphilis
Causes of membranous glomerulonehritis
Idiopathic Infections Malignancy NSAIDs SLE, thyroiditis, RA
Antibodies present in idiopathic membranous glomerulonephritis
anti-phospholipase A2
Alport patient with failing renal transplant
Think Goodpastures
Granular casts (brown/muddy, acellular casts) are found in which type of AKI?
ATN - Acute Tubular Necrosis
Also in dehydration + exercise
Which type of nephrotic syndrome shows rapid response to steroid therapy (rapid improvement in proteinuria)
Minimal Change Disease
CKD stage 1 defined as
eGFR >90 + sign of kidney damage on another test
CKD stage 2
eGFR 60-90 + some sign of kidney damage
CKD stage 3a
eGFR 45-59
CKD stage 3b
eGFR 30-44
CKD stage 4
eGFR 15-29
CKD stage 5
eGFR <15 ml/min
Cause of AKI in septic shock
Acute tubular necrosis
or rarely: cortical necrosis
Causes of acute tubular necrosis (ATN)
Sepsis/shock
Contrast media
Myoglobin (rhabomyolysis)
Aminogloycosides
Causes of acute interstitial nephritis/tubulointerstitial nephritis (AIN)
NSAIDs, penicillin, rifampicin, furosemide, allopurinol
SLE, sarcoid, Sjogren
Staphylococcus
1st-line management of hypertension in CKD 4/5
ACEi
2nd-line management of hypertension in CKD 4/5
Furosemide
Haematuria in sickle cell anaemia, think:
Papillary necrosis
Management of 15-39yo with ADPKD and eGFR>90
ACEi with target BP < 110 / 75 mmHg
Alports appearance under light microscopy
Normal
Alports appearance under electron microscopy
‘Basket weave’ appearance of basement membrane
Management of nephrogenic diabetes insipidus
Thiazide
Young women with AKI, visual disturbance, weight loss, think:
Tubulointerstitial nephritis with uveitis (TINU)
USS kidney shows ‘clubbed calyces’ in which condition
Papillary necrosis
Target ferritin level in CKD stage 4/5 (not undergoing haemodialysis)
> 100 ng/ml
Target transferrin saturation in CKD stage 4/5
> 20%
Target Hb in CKD stage 4/5
100 - 120
Target ferritin level in CKD stage 4/5 (undergoing haemodialysis)
> 200 ng/ml
Biopsy findings in membranous glomerulonephritis
Diffuse thickening of BM
‘Spike & dome’: Subepithelial deposits of IgG AND complement
Biopsy findings in Goodpastures
Linear deposition of IgG in BM
Hepatitis C is most commonly associated with which type of glomerulonephritis
MesangioCapillary GN
Renal complication of Indinavir
Renal stones (needle-shaped crystals)
Renal complication of Tenofovir
Acute Tubular Necrosis
Fanconi syndrome
Pattern of glomerulonephritis seen in HIV-associated nephropathy
FSGS with capillary collapse
Renal conditions that reoccur after renal transplant
Membranoproliferative GN
IgA nephropathy
FSGS
Membranous GN
Indications for dialysis in CKD stage 5
Symptomatic from fluid overload or uraemia (lethargy, itch, confusion, nausea)
or
Asymptomatic with eGFR 5 - 7
Presentation of post-streptococcal glomerulonephritis
1 - 2 WEEKS post strep infection
Haematuria (“cola urine”)
Proteinuria, oedema
Low complement
Pattern of GN seen in post-streptococcal glomerulonephritis
Diffuse proliferative glomerulonephritis
Measurement of anion gap
(Na + K) - (HCO3 - Cl)
Normal anion gap
10 - 18
Causes of metabolic acidosis with normal anion gap (hyperchloremic metabolic acidosis/bicarb loss)
Gastrointestinal bicarb loss
RTA
Addisons
Acetazolamide
Causes of metabolic acidosis with raised anion gap
Lactate (shock, hypoxia) Ketones Urate (renal failure) Methanol, Ethanol glycol Salicylates 5-oxoproline (paracetamol)
Management of membranous lupus nephritis (class V lupus nephritis)
ACEi for HTN
IV methylprednisolone (severe)
Immunosuppressant
(cyclophosphamide/MMF)
ADPKD with CKD 2/3 and rapidly progressing disease, consider
Tolvaptan (vasopressin R2 antagonist)
AA amyloidosis associated with which diseases
(Poorly controlled) chronic inflammation eg RA, Ankylosing Spondylitis
Management of patient with visible haematuria coinciding with intercurrent URTI (and clinically well)
Routine referral to renal
to establish diagnosis and risk of future renal impairment
Where to biopsy for suspected AA amyloidosis
Skin, rectal mucosa or abdominal fat (less invasive than renal)
Membranous glomerulonephritis - all patients should receive..
ACEi/ARB
Consider anti-coagulant
Membranous glomerulonephritis - management of severe/progressive disease
ACEi/ARB
Corticosteroid + Immunosuppressant (eg cyclophosphamide/MMF/chlorambucil/ciclosporin)
1st line investigation of testicular mass
USS testes
then tumour markers if suspicious for malignancy
Management of Goodpastures
Plasmapheresis + steroids + cyclophosphamide
Features of fibromuscular dysplasia (FMD)
Young
Renal vascular disease/cerebrovascular disease
‘String of beads’ appearance
Indications for urgent dialysis
Symptomatic uraemia
Pulmonary oedema, despite full medical management
K >6.5 despite, full medical management
Metabolic acidoses pH < 7.1
Remove toxins eg lithium
Presentation of CMV infection post-renal transplant
1-4 months after transplant/after stopping prophylaxis
Fever, myalgia
AKI
Which renal transplant recipients do not receive CMV prophylaxis (valganciclovir)
If recipient and donor both test negative for CMV
Anti-hypertensive used in systemic sclerosis renal crisis (and other renal vasculitis)
ACEi
1st line management of minimal change disease
Steroids
+/- ACEi if HTN/AKI
2nd line management of minimal change disease
Immunosuppressant (eg Cyclophosphamide)