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- W2745751778 abstract "We aimed to obtain fundamental information for potential pulmonary delivery of powder aerosols using a clinically-approved nasal high-flow system (AIRVO), with spray-dried mannitol (SD-Man) being a model powder. Compressed air exiting the AIRVO at set 'dispersion' air flow rates dispersed SD-Man loaded in an Osmohaler® into a human nasal airway replica (NAR) coupled downstream to a Next Generation Impactor (NGI) running at specific 'inspiratory' flow rates. Increasing the dispersion flow rate from 30 to 60L/min increased powder deposition in the NAR from 50 to 70% of the emitted dose, while decreased the NGI deposition from 50 to 30% of the emitted dose. The inspiratory flow rate did not affect powder deposition in the NAR and NGI. In contrast, as the inspiratory flow rate was increased from 15 to 40L/min, powder recovery, emitted fraction, and fine particle fraction below 5μm (as aerosol performance indices) were increased from 90, 30 and 5% to 97, 45 and 8% of the loaded dose, respectively. The dispersion flow rate did not change the performance indices. Importantly, heating and humidification of dispersion airflow, loaded doses, and nasal cannula sizes did not greatly affect the aerosol characteristics." @default.
- W2745751778 created "2017-08-31" @default.
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- W2745751778 date "2017-11-01" @default.
- W2745751778 modified "2023-09-24" @default.
- W2745751778 title "Powder aerosol delivery through nasal high-flow system: In vitro feasibility and influence of process conditions" @default.
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- W2745751778 doi "https://doi.org/10.1016/j.ijpharm.2017.08.079" @default.
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