Inhaler Device Selection — RACP Paediatrics MCQ

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EasyRespiratoryInhaler Device SelectionRACP Paediatrics

A 7-year-old with asthma uses a metered-dose inhaler. At what age can most children effectively use a dry powder inhaler (DPI) without a spacer?

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Correct answer: B — 7-8 years (when adequate inspiratory flow can be generated)

DPIs require a sufficient inspiratory flow rate (typically >30 L/min) that most children can generate from age 7-8 years. Children <6 years should use a pMDI with spacer +/- mask. Spacers improve drug delivery and reduce oropharyngeal deposition.

Reference: National Asthma Council Australia – 2024 – Australian Asthma Handbook