paediatrics Flashcards

1
Q

explain the pathophysiology of Kawasaki disease (KD)

A
  • KD is an acute, self-limiting systemic vasculitis of unknown etiology
  • likely immune-mediated (possibly post-infectious)
  • predominantly affecting medium-sized arteries, especially the coronary arteries.
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2
Q

explain the incidence of Kawasaki disease (KD)

A

It’s most common in children <5 years, with a peak incidence at 6-24 months.

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3
Q

explain the diagnostic criteria for complete Kawasaki disease

A

Complete KD requires fever ≥5 days plus ≥4/5 of:
- Cervical lymphadenopathy
- Bilateral non-exudative conjunctivitis
- Oral changes (strawberry tongue, fissured lips, pharyngeal erythema)
- Extremity changes (acute erythema/oedema, later desquamation)
- Polymorphous rash (non-vesicular)

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4
Q

what is this disease?

A

Kawasaki disease

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5
Q

List 2 infective and 2 non-infective differential diagnoses you would also consider for a child with ?Kawasaki Disease

A

Infective: Scarlet fever, Measles, Sepsis

Non-Infective: drug reactions (Steven-Johnson), Juvenile idiopathic arthritis

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6
Q

how would you define incomplete Kawasaki Disease?

A

Fever ≥5 days with 2-3 features, plus supportive evidence (e.g., coronary artery dilation on echo, or lab markers like CRP >30 mg/L, ESR >40 mm/h).

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7
Q

what are complications of Kawasaki Disease?

A

Coronary artery aneurysms in 20-25% of untreated cases, risking thrombosis or rupture.
Other features include myocarditis, pericarditis, or valve dysfunction.

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8
Q

discuss investigations in ED for suspected Kawasaki Disease and justification

A
  • echo: rule out coronary artery aneurysm
  • troponin: elevated with myocarditis
  • ECG: changes with myo/pericarditis (prolonged PR, non-specific ST changes, T wave changes, arrhythmia, 2 to 3rd degree HB.
  • ESR>40/CRP>30: indication to commence treatment
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8
Q

discuss management in ED for Kawasaki Disease

A
  • aspirin (high-dose 80-100 mg/kg/day initially, then low-dose 3-5 mg/kg/day
  • IVIG (2 g/kg over 10-12 hours)
  • steroids
  • cyclosporin
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