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Does it really matter what volume to exhale before using asthma inhalation devices?
Timothy H Self1, Nathan A Pinner, Rebecca S Sowell
1University of Tennessee Health Science Center, Methodist University Hospital, Memphis, TN 38163, USA. tself@utmem.edu
Summary
For optimal asthma management, exhalations to functional residual capacity (FRC) or residual volume (RV) before actuating metered dose inhalers (MDI) are crucial. Patient and healthcare provider education on this technique is vital for correct inhalation device use.
Area of Science:
- Pulmonology
- Respiratory Medicine
- Pharmacology
Background:
- Correct use of inhalation devices is critical for effective asthma management.
- Controversies exist regarding optimal technique for metered dose inhalers (MDI).
Purpose of the Study:
- To review literature on the optimal lung volume for metered dose inhaler (MDI) actuation.
- To summarize correct exhalation techniques for various inhalation devices.
Main Methods:
- Literature review focusing on the step of MDI actuation.
- Synthesis of findings regarding exhalation to functional residual capacity (FRC) or residual volume (RV).
Main Results:
- Six of nine studies support exhaling to FRC or RV before MDI actuation.
- Evidence also supports this technique for MDIs with holding chambers and dry powder inhalers.
- Many patients and healthcare professionals lack knowledge or forget this crucial step.
Conclusions:
- Exhaling gently to FRC or RV before inhaling asthma medication is essential for MDI and other inhalation device use.
- Education for patients and healthcare professionals is necessary to ensure correct technique and improve asthma management.
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