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Background

In acute asthma inhaled beta₂‐agonists are often administered by nebuliser to relieve bronchospasm, but some have argued that metered‐dose inhalers with a holding chamber (spacer) can be equally effective. Nebulisers require a power source and need regular maintenance, and are more expensive in the community setting.

Objectives

To assess the effects of holding chambers (spacers) compared to nebulisers for the delivery of beta₂‐agonists for acute asthma.