Understanding Inhalers: Types, How They Work & Choosing the Right One
Inhaler Types
- Metered-Dose Inhalers (MDIs): Pressurized canister delivers aerosolized dose. Requires coordination (actuation + inhalation). Spacer improves delivery.
- Dry Powder Inhalers (DPIs): Breath-actuated; powder dispersed by patient's inspiratory flow. Easier coordination; not for very low flow rates.
- Soft Mist Inhalers (SMIs): Mechanical spring generates slow-moving mist; easier coordination, high lung deposition. Newer, costlier.
- Nebulizers: Compress air/oxygen to aerosolize liquid; for severe disease, infants, or those unable to use handheld devices. Home/hospital use.
- Specialty: Breath-actuated MDIs, single-dose DPIs.
Selection Factors
Age, dexterity, inspiratory flow, medication type, cost, preference. Proper technique is critical—review regularly with provider/pharmacist.
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