Renal Flashcards
CT kidney shows large lesion with central scar, macroscopically the lesion is mahogony in colour.
What is the likely diagnosis?
Benign or malignant?
Oncocytoma
Benign
What is the most common intra abdominal tumour in children?
Wilm’s tumour (nephroblastoma)
“cannon ball mets” on CXR make you think
Renal cell carcinoma
Most common TYPE of renal cell carcinoma?
Clear cell
Loin pain + haematuria + renal mass
Renal cell carcinoma
Renal cell carcinoma is often an incidental finding. True or false?
True
Which staging is used for renal cell carcinoma?
Robson
Renal cell carcinoma most commonly metastasises to?
Lungs
Management of renal cell carcinoma
Radical nephrectomy (if high risk) Partial nephrectomy (low/moderate risk)
Which autosomal dominant syndrome has a high link with renal cell carcinoma?
Von Hippel Lindeau
Managment of infected hydronephrosis
Percutaneous Nephrostomy
Inflammation around the renal tissues which does NOT affect the glomerulous. There is infiltration of immune cells (neutrophil, eosinophil) what is the likely diagnosis?
Interstitial nephritis
Patient develops AKI after treatment of hypertension. What is the likely diagnosis?
Renal artery stenosis
Abdominal bruit makes you think
Renal artery stenosis
Gold standard investigation to check for renal artery stenosis?
CT angiography
Maybe MR angiography?
ACE inhibitors and renal artery stenosis
- unilateral vs bilateral
ACE inhibitors contraindicated in bilateral RAS
ACE inhibitors used to treat unilateral RAS
Young female with Ehlors Danlos syndrome and hypertension. On CT angiography renal artery looks like string of beads. What is likely diagnosis?
Fibromuscular dysplasia
Collection of abnormal plasma cells accumulate in bone marrow
Myeloma
Bone pain, renal failure, weakness, weight loss, hypercalcaemia - paints picture of
Myeloma
Bence jones proteins in urine in which condition
Myeloma
Which electrolyte imbalance is most likely associated with cardiac arrhythmia?
Hyperkalaemia
Tall tented T wave
Flattened P wave
Broad QRS
Hyperkalaemia
Emergency management of hyperkalaemia
Calcium gluconate
Insuline with 50% dextrose or salbutamol
At which level of hyperkalaemia would you consider dialysis
K+ > 7
K+ > 6.5 (and not responding to medical therapy)
Which 2 body symptoms does goodpastures syndrome affect
Kidneys
Lungs
AKI + Haematuria + haemoptysis
Goodpastures syndrome
Goodpastures syndrome is an attack of?
Type IV collagen
What is seen on immunofluorescence in goodpastures syndrome
Linear IgG deposition along basement membrane
What is the best way to monitor kidney function
GFR
Proteinuria is associated with
- nephritic syndrome
- nephrotic syndrome
Nephrotic syndrome
In diabetic nephropathy, there is dilation/constriction in the afferent arteriole and dilation/constriction in the efferent arteriole ?
Dilation - afferent
Constriction - efferent
Diabetic nephropathy - urinalysis findings
Protienuria / hyperalbuminuria
Management of diabetic nephropathy
Tight glycaemic control
Anti-hypertensives (ACE inhibitor - dilates efferent arteriole)
Statin
Dialysis
Transplant
Name 3 types of small vessel vasculitis
GPA
EGPA
microscopic polyangitis
cANCA suggests
GPA
pANCA suggests
EGPA
What are the ‘triple whammy’ drugs to avoid in an AKI?
Diuretics
NSAIDs
ACE inhibitor / ARBs
What is the main thing to check if you think a patient may have AKI ?
Creatinine (is it 50% increased from baseline / >26) Urine output (is there <0.5mL/kg/hr)
Name 3 pre-renal causes of AKI
Hypovolaemia (haemorrhage, D+V)
Hypotension (shock, sepsis)
Renal hypoperfusion (triple whammy drugs, renal artery stenosis)
In normal patients, if there is decreased renal perfusion efferent arteriolar constriction/dilation occurs to maintain GFR?
efferent constriction in normal patients
What mediates arteriolar vasoconstriction to maintain the GFR ?
Angiotensin II
What is the immediate management of pre-renal AKI?
IV FLUIDS
Crystalloid (0.9% NaCl)
Stop nephrotoxic drugs
Untreated pre-renal AKI leads to
Acute tubular necrosis
Name 4 causes of renal AKI
Vascular (vasculitis)
Glomerular disease
Interstitial nephritis
Tubular injury (acute tubular necrosis)
Investigations carried out in ?renal AKI ?
U+E - increased creatinine, increased urea
Urinalysis - proteinuria
US - small kidneys suggest CKD normal kidney AKI
Immediate management of renal AKI
IV fluids 25ml bolus up to 1000ml if patient still not resuscitated then - inotropes, vasopressors if patient STILL not resuscitated then - dialysis
Post renal AKI causes (4)
Renal / ureteric stones
Malignancy
Strictures
BPH
Obstruction causes back pressure (hydronephrosis)
Management of post-renal AKI
Relieve obstruction
- Nephrostomy
- Catheter
BP cut off if patient has proteinuria and CKD
130/80
Name some risk factors for CVD progression
CVD Diabetes Hypertension Renal artery stenosis PKD AKI Small vessel vasculitis Glomerulonephritis Chronic NSAID use
Normal GFR is over which value ?
90
Stage 1 CKD
GFR normal (>90) Structural change to kidney
Stage 2 CKD
GFR mildly reduced (60-89)
Structural change to kidney
Stage 3A CKD
GFR moderately reduced (45-59)
Defined on GFR alone
Stage 3B CKD
GFR moderately reduced (30-44)
Defined on GFR alone
Stage 4 CKD
GFR severely reduced (15-29)
Stage 5 CKD
Renal failure
GFR < 15 or pt on dialysis
The majority of people with CKD will reach end stage renal failure. True or false?
False
Investigations for CKD
GFR - decreasing
U+E - increased creatinine
Urinalysis - proteinuria
if patient has eGFR 50ml/min but normal kidneys and nothing to suggest why they have CKD then do NOT label them as a CKD patient. True or false/
True
CKD increases the risk of
Atherosclerosis
When should you consider dialysis
When eGFR around 20ml/min
What causes pre-renal AKI
Decreased blood flow to kidneys (which in turn decreases the GFR)
- hypovolaemia
- dehydration
- renal hypoperfusion (triple whammy meds)
Mangement of pre renal AKI
Fluids (0.9% saline)
Patient with oedema, proteinuria, hypoalbuminaemia. What is the likely diagnosis?
Nephrotic syndrome
What is the protein range for nephrotic syndrome?
Protein over 3g/day
What is the likely cell for nephrotic syndrome
- mesangial cell
- endothelial cell
- podocyte
Podocyte
non-proliferative
Management of nephrotic syndrome
Fluid restriction
Salt restriction
Diuretics
ACEi / ARBs
What is the likely cell for nephritic syndrome
- mesangial cell
- endothelial cell
- podocyte
Endothelial cell (proliferative)
Nephrotic syndrome in children
Minimal change nephropathy
Management of minimal change nephropathy (nephrotic syndrome)
1st line
2nd line
1st line - oral steroids
2nd line - cyclophosphamide
What is the commonest cause of nephrotic syndrome in adults?
FSGS
What is the most common glomerulonephritis in the wold?
IgA nephropathy
Macroscopic haematuria after respiratory infection. Think
IgA nephropathy
If someone has acute severe changes in U+Es, why do you only give 90 mins (short session) of dialysis initially?
To reduce the risk of dysequilibrium syndrome
Anti-GBM antibody in which condition?
Good pastures syndrome
Platelets are low in DIC. True or false?
True
Patient with diabetic nephropathy?
Good diabetic control
ACE inhibitor
Iron deficiency anaemia in patient with CKD. If iron deplete, what is the treatment?
iron replacement
Iron deficiency anaemia in patient with CKD. If iron Replete, what is the treatment?
EPO
Someone with CKD, not taking medications…what could be the next treatment?
Dialysis
Hyperkalaemia treatment
10% 10ml Calcium gluconate
Insulin + Dextrose
Speak to renal
ECG changes in hyperkalaemia?
Tall tented T waves
Broad bizarre QRS
Flat P waves
Dialysis patient with hyperkalaemia. What is the definitive treatment?
Dialysis
ECG change in hypercalcaemia
Short QT interval
Treatment of hypercalcaemia
Aggressive fluid rehydration Bisphosphinate use (zolendronic acid)
Hypernatraemia - caused by excess water loss. True or false?
True
- pee out lots of urine
Sodium low, you would expect osmolality to be high/low?
Low
urine osmolality < plasma osmolality - what does this suggest
Diabetes insipidus
Urine osmolality > plasma osmolality - what does this suggest?
Osmotic diuresis
Treatment of mild hypernatraemia?
Replace water loss with oral water or 5% glucose IV
Treatment of severe hypernatraemia?
IV NaCl
Tumour lysis syndrome - what is the common electrolyte abnormality?
High phosphate
How do you manage hypokalaemia?
Sando K
If you are giving IV potassium, what is the maximum flow rate?
10mmol/hr
common cause for someone to be hypocalcaemic?
Vitamin D deficiency
If patient is hyponatraemic, low osmolality, full of fluid, urinary sodium is high what is the likely cause?
Diuretics
if the sodium level is low and hypovolaemic, what you thinking about?
LOSSES
- vomiting
- diarrhoea
- burns
If you detect a patient has a metabolic acidosis, what should you do nexr?
Check for anion gap
- if raised think MUDPILES
Hypercalcaemia investigations
PTH
Malignancy
Hyponatraemic patient - what do you do?
assess fluid status
urinary sodium
What is the best type of kidney transplant?
Live donor
74 year old woman is hypoxic and has haemoptysis. She has a purpuric rash.
Creatinine is 430. Blood and protein on dip.
RBC casts on microscopy.
What glomerular cells are most likely to be injured?
- mesangial cells
- endothelial cells
- podocytes
How would you confirm the diagnosis?
Endothelial cells - this is likely vasculitis
Confirm diagnosis by doing ANCA
82 year old man admitted with BP 70/30, T 39, pulse 140bpm, K+ 7.0, urea 48, Cr 789, CRP 250, CXR left basal consolidation. What is the likely diagnosis? ¥ A. Rhabdomyolosis ¥ B. Goodpasture’s Syndrome ¥ C. Acute Tubular Necrosis ¥ D. Obstructive Uropathy ¥ E. Wegener’s Granulomatosis
C. Acute Tubular Necrosis
39 yo woman with 2 day history of fever, vomiting, dysuria, back pain. Examination findings: pulse-110, temp-39. Chest clear. Left loin tenderness. Urinalysis: +++leukocyte, +ve nitrite, +++protein, blood trace haemolysed. What is the likely diagnosis?
- A. UTI
- B. Acute pyelonephritis
- C. Cystitis
- D. Acute glomerulonephritis
B - acute pyelonephritis