How should you use a spacer with a metered-dose inhaler (MDI) for a patient with asthma?

How should you use a spacer with a metered-dose inhaler (MDI) for a patient with asthma?

• A. Attach spacer, shake, prime as needed, exhale, seal lips around spacer, press inhaler, inhale slowly, hold breath 5–10 seconds.
• B. Attach spacer only after inhaling.
• C. Exhale before pressing inhaler without spacer.
• D. Use spacer only with children

Answer: (A)

Using a spacer with a metered-dose inhaler improves medication delivery to the lungs because it decouples actuation from inhalation, making it easier to inhale the dose slowly and absorb it rather than losing it to the mouth or throat. The correct technique is to attach the spacer, shake the inhaler, prime it as needed, exhale fully, place the spacer in the mouth with lips sealed around it, press the inhaler once to release the dose, then inhale slowly through the spacer. After the dose is inhaled, continue to breathe in slowly and hold the breath for about 5–10 seconds to maximize deposition in the lungs. If another puff is needed, wait 30–60 seconds and repeat the steps, priming again if indicated. This method is effective for patients with asthma who have difficulty coordinating inhalation with actuation and is suitable for both adults and children; other options misalign the timing or suggest incorrect uses of the spacer.

Using a spacer with a metered-dose inhaler improves medication delivery to the lungs because it decouples actuation from inhalation, making it easier to inhale the dose slowly and absorb it rather than losing it to the mouth or throat. The correct technique is to attach the spacer, shake the inhaler, prime it as needed, exhale fully, place the spacer in the mouth with lips sealed around it, press the inhaler once to release the dose, then inhale slowly through the spacer. After the dose is inhaled, continue to breathe in slowly and hold the breath for about 5–10 seconds to maximize deposition in the lungs. If another puff is needed, wait 30–60 seconds and repeat the steps, priming again if indicated. This method is effective for patients with asthma who have difficulty coordinating inhalation with actuation and is suitable for both adults and children; other options misalign the timing or suggest incorrect uses of the spacer.