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A 2-month-old male infant presents to the ED with a 3-day history of coryza, cough and increased work of breathing. He is alert but unsettled. Observations: Temp 38.9Β°C, HR 165, RR 60, sats 91% RA, moderate intercostal and subcostal recession, diffuse bilateral crackles and wheeze on auscultation.

1. State (5) clinical features or factors that increase the risk of clinical deterioration or need for admission in any infant with bronchiolitis. 5 marks

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2. List (2) investigations that are NOT routinely indicated for bronchiolitis and briefly justify why. 2 marks

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3. Outline the KEY principles of emergency department management for this patient. 5 marks

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