Spacer

Spacer (medicine)

A spacer is a device used to increase the efficacy of inhalers in the management of asthma and COPD. Spacers are also known as aerosol-holding chambers (AHCs), valved holding chambers (VHCs), or volumatic.

Function

Spacers are designed to hold the medication released by the inhaler, allowing the patient to inhale more slowly and deeply, improving the delivery of the medication to the lungs. They can also reduce the amount of medication that ends up in the mouth, which can lead to thrush.

Types

There are two main types of spacers: valved and non-valved. Valved spacers have a one-way valve that allows air to enter the chamber when the patient inhales and closes when the patient exhales. Non-valved spacers do not have this feature.

Use

Spacers are used with metered-dose inhalers (MDIs). The inhaler is pressed to release a dose of medication into the spacer, which is then inhaled by the patient. Spacers can be used by adults and children, and are particularly useful for children who may find it difficult to use an inhaler correctly.

Benefits

Using a spacer with an inhaler can increase the amount of medication that reaches the lungs, and reduce the risk of side effects. It can also make inhalers easier to use for people who have difficulty coordinating their breath with pressing the inhaler.

See also

• Inhaler
• Asthma
• COPD
• Metered-dose inhaler

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