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The inhalation rate is important when patients use an inhaler. Dry powder inhalers (DPIs) require an inhalation rate >30Lmin −1 whereas metered dose inhalers (MDIs) should be used at <90Lmin −1 . Within the setting of a routine clinic, we have measured peak inhalation flows (PIF) of COPD patients when they used a Diskus (SDSK), Turbuhaler (STBH), Handihaler (SHAND) and MDI. Subjects...
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