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• W2975223675 abstract "<b><i>Background:</i></b> There has been increasing interest in transnasal pulmonary aerosol administration, but the dose-response relationship has not been reported. <b><i>Objectives:</i></b> To determine the accumulative bronchodilator dose at which patients with stable mild-to-moderate asthma and chronic obstructive pulmonary disease (COPD) achieve similar spirometry responses before and after bronchodilator tests using albuterol via a metered dose inhaler with a valved holding chamber (MDI + VHC). <b><i>Method:</i></b> Adult patients who met ATS/ERS criteria for bronchodilator responses in pulmonary function laboratory were recruited and consented to participate. After a washout period, patients received escalating doubling dosages (0.5, 1, 2, and 4 mg) of albuterol in a total volume of 2 mL delivered by vibrating mesh nebulizer via a nasal cannula at 37°C with a flow rate of 15–20 L/min using a Venturi air entrainment device. Spirometry was measured at baseline and after each dose. Titration was stopped when an additional forced expiratory volume in 1 second (FEV₁) improvement was &#x3c;5%. <b><i>Results:</i></b> 42 patients (16 males) with stable mild-to-moderate asthma (<i>n</i> = 29) and COPD (<i>n</i> = 13) were enrolled. FEV₁ increment after a cumulative dose of 1.5 mg of albuterol via nasal cannula at 15–20 L/min was similar to 4 actuations of MDI + VHC (0.34 ± 0.18 vs. 0.34 ± 0.12 L, <i>p</i> = 0.878). Using ATS/ERS criteria of the bronchodilator test, 33.3% (14/42) and 69% (29/42) of patients responded to 0.5 and 1.5 mg of albuterol, respectively. <b><i>Conclusions:</i></b> With a nasal cannula at 15–20 L/min, transnasal pulmonary delivery of 1.5 mg albuterol resulted in similar bronchodilator response as 4 actuations of MDI + VHC." @default.
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• W2975223675 date "2019-01-01" @default.
• W2975223675 modified "2023-10-05" @default.
• W2975223675 title "Dose Response to Transnasal Pulmonary Administration of Bronchodilator Aerosols via Nasal High-Flow Therapy in Adults with Stable Chronic Obstructive Pulmonary Disease and Asthma" @default.
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• W2975223675 doi "https://doi.org/10.1159/000501564" @default.
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