Question 1
A 55-year-old patient is transitioning to a tiotropium soft mist inhaler for asthma control and asks how this device differs from their previous metered-dose inhaler.
▸ Why D is the answer
A tiotropium soft mist inhaler delivers a slow-moving aerosol cloud, requiring the patient to inhale slowly and deeply to maximize lung deposition. Option A is incorrect because SMIs do not contain propellants or suspensions that require shaking, unlike traditional MDIs. Option B is incorrect because SMIs are designed to be used without a spacer; the slow mist velocity inherently reduces oropharyngeal deposition. Option C describes the technique for a dry powder inhaler, which relies on forceful inspiratory flow, whereas the SMI actively propels the medication independent of patient effort.
🔑 Key takeaway
Soft mist inhalers require a slow, deep inhalation and do not need shaking or spacers.
