Chronic Kidney Disease Flashcards

1
Q

Define chronic kidney disease

A

The presence of kidney damage or decreased kidney function for three months or longer.

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2
Q

Define accelerated CKD

A

A sustained decrease in GFR of at least 25% and a change in GFR category within 12 months, or when GFR decreases by 15ml/min per year.

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3
Q

Define kidney failure

A

GFR < 15ml/min, or when dialysis or transplant is required.

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4
Q

Describe Stage 1 CKD

A

Kidney damage
Normal or high GFR
GFR>90

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5
Q

Describe Stage 2 CKD

A

Kidney damage
Mild reduction in GFR
GFR = 60 - 89

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6
Q

Describe Stage 3 CKD

A

Kidney function is moderately impaired

3a: GFR = 45 - 59
3b: GFR = 30 - 44

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7
Q

Describe Stage 4 CKD

A

Kidney function is severely impaired

GFR = 15 - 29

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8
Q

Describe Stage 5 CKD

A

Advanced disease or patient is on dialysis

GFR <15

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9
Q

What does it mean if the suffix “p” is added onto the CKD classification?

A

The patient has proteinuria as well as decreased GFR.

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10
Q

Give five pieces of evidence that indicate CKD, other than GFR.

A
  • Persistent microalbuminuria.
  • Persistent proteinuria.
  • Persistent haematuria (after exclusion of other causes – e.g. urological disease).
  • Structural abnormalities of the kidneys, demonstrated on ultrasound scanning or other radiological tests
  • Biopsy-proven chronic glomerulonephritis.
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11
Q

List possible causes or risk factors for CKD

A
Diabetes
Glomerulonephritis
Hypertension
Renovascular disease
Polycystic kidney disease
Infective, obstructive and reflux nephropathies
Hypercalcaemia
Multisystem diseases such as SLE
Neoplasms
Myeloma
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12
Q

Describe the specific symptoms that can present in sever CKD

A
Anorexia, nausea and vomiting
Fatigue, lethargy, weakness
Weight loss
Dyspnoea, pulmonary oedema, peripheral oedema
Nocturia, polyuria, headache
Pruritus
Impotence (men), amenorrhoea (women)
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13
Q

Describe the clinical signs that can present in a patient with advanced CKD

A

Skin pigmentation or pallor
Excoriation (skin picking) due to pruritus
Hypertension but with postural hypotension
Peripheral oedema
Left ventricular hypertrophy
Pleural effusions
Peripheral vascular disease, peripheral neuropathy

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14
Q

Give five classes of drugs that are particularly significant in kidney disease

A
NSAIDs
penicillins/aminoglycosides
chemotherapeutic drugs
narcotics 
ACE inhibitors/ARBs
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15
Q

How is eGFR calculated?

A

eGR is calculated by measuring serum creatinine and using a set formula.

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16
Q

What is the gold standard for measuring kidney function?

A

Glomerular filtration rate (GFR) using inulin.

17
Q

In CKD, would serum levels of sodium, potassium, bicarbonate and phosphate be expected to be high, low or normal?

A

Sodium - usually normal but may be low
Potassium - high
Bicarbonate - low (four from 24 = chronic)
Phosphate - usually high

18
Q

When might hypoalbuminaemia occur in patients with chronic kidney disease?

A

Hypoalbuminaemia may occure in patients who are nephrotic and/or malnourished. Low levels of albumin at the start of dialysis are associated with a poor prognosis

19
Q

How is serum level of parathyroid hormone affected by chronic kidney disease?

A

Serum PTH rises progressively with declining kidney function.

20
Q

What is the significance of a high serum alkaline phosphatase in CKD patients?

A

A high alkaline phosphatase is indicative of the development of bone disease.

21
Q

What is the cause of anaemia in CKD?

A

low levels of haemoglobin (normal Hb is 11.5-16g/dL in females and 13.5-18g/dL in males)

22
Q

Describe the three components of the nephrotic syndrome triad

A

Proteinuria (>3.5g/24hrs)
Hypoalbuminaemia - due to renal protein loss
Oedema - due to low intravascular oncotic pressure associated with hypoalbuminaemia, and to some extend the fluid retention caused by decreased tubular function in the kidney.
(may also have hypercholersterolaemia)

23
Q

Describe the components of nephritic syndrome

A

Hyperension
Haematuria (usually microscopic but can be macroscopic)
Acute renal failure
(may also have oedema)

24
Q

Name three equations used to calculate eGFR from serum creatinine

A

Cockcroft Gault equation
MDRD 4 variable equation
CKD-EPI equation

25
Q

List the types of imaging which may be used in the investigation of kidney disease

A
ECG and echocardiography
Abdominal X-ray
Renal ultrasound
Renal CT
MRI
26
Q

What should always be done before taking a renal biopsy?

A

Check clotting ability

27
Q

List 10 potential complications of chronic kidney disease

A
Acidosis
Anaemia
Bone disease
Cardiovascular risk
Dialysis and Death
Electrolytes
Fluid overload
Gout
Hypertension
Iatrogenic issues
28
Q

Generally speaking, when does fluid overload become problematic?

A

When GFR<20mls/min

29
Q

How is hyperkalaemia managed?

A

Acute:

  • administer calcium gluconate to stabilise patient
  • administer salbutamol or insulin-dextrose to shift potassium into cells
  • use dialysis and/or calcium resonium to remove excess potassium

Chronic hyperkalaemia can be managed with diet and drug modifications.

30
Q

What is the normal range for potassium? At what level is there a serious risk of cardiac arrest?

A

Normal range 3.5 - 4.5 mmol/L

K+ > 7 mmol/L may induce cardiac arrest

31
Q

Describe the management of fluid overload in CKD

A

Na+ restriction
Fluid restriction
Loop diuretics

32
Q

Describe the presentation of Polycystic Kidney Disease

A
Acute loin pain
May have haematuria
Vague abdominal/loin discomfort due to increasing size of kidneys
Hypertension
Features of uraemia
33
Q

What are the potential extrarenal manifestations of PKD?

A

Cysts can occur in the liver (most common), pancreas, spleen and/or lungs
Berry aneurysms
Mitral valve prolapse
Increased frequency of colonic diverticula

34
Q

What is the prognosis of Polycystic Kidney Disease?

A

45% will be in end stage renal disease by the age of 60