An estimated ⅔ of patients and healthcare professionals have improper technique while using an MDI.9, As discussed above, oropharyngeal deposition and actuation-inhalation coordination are the two principal issues with inhalers. A third problem with technique is insufficient breath-holding. One must hold their breath for 10 seconds to allow for the particles to travel through the airways before exhaling. One study found that lung deposition of a inhaled drug was reduced by 16% with insufficient breath-holding.
Below is a list of common errors with inhaler devices.
Table 3 – Common Nebulizer Problems
MDI without spacer
MDI with spacer
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