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Purpose We hypothesize that the USP induction port may de-agglomerate carrier-free powder emitting from dry powder inhalers (DPIs). Methods Aerosols emitting from a range of DPIs (Spinhaler®, Turbuhaler® and OsmohalerTM) and induction ports (USP throat, straight tube, Alberta idealized mouth-throat geometry (AG)) were sized by laser diffraction. Total drug recovery was obtained by HPLC and fine...
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