Abstract
Objectives: The aim of this in vitro study was to determine the delivered dose of budesonide 200μg via a chlorofluorocarbon-free pressurized metered dose inhaler (pMDI) when administered through different spacers in tidal breathing patterns of young children.
Methods: Tidal breathing was simulated for toddlers and children. Spacers tested were Babyhaler®, AeroChamber® Plus small and medium; the pMDI was Budiair® 200μg. Output was measured after one actuation and five inhalations in primed and unprimed spacers. Cumulated output was evaluated after each of five simulated inhalations. Aerosol characteristics — i.e. particle size distribution of the output — were determined in primed spacers with a cascade impactor using high-performance liquid chromatography and UV detection.
Results: Total output from primed spacers after five inhalations was determined between 37.9μg and 40.9μg with little differences between spacers and breathing patterns. About 58–79% of this total output was inhaled with the first breath from the AeroChamber® Plus and about 26% from the Babyhaler®. The fine particles <5μm ranged between 87% and 92% of the delivered dose for all three spacers.
Discussion and Conclusion: The nominal dose (200μg) of the Budiair® 200μg inhaler is reduced to 40μg delivered dose or less by using Babyhaler® and AeroChamber® Plus spacers taking five breaths. With a single breath the delivered dose can be reduced further to a minimum of 10μg using the Babyhaler®. Clinical studies are warranted in the future for decisions on ’clinical efficacy’, safety, and exact dose adjustment.
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Notes
1 The use of trade names is for product identification purposes only and does not imply endorsement.
2 Outside the spacer: 40% of the nominal dose pass the spacer and 90% of these particles are smaller than 4.9μm (= respirable fraction.)
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Acknowledgments
A study grant was given by Asche Chiesi GmbH, Hamburg, Germany.
The authors wish to thank Dr Frank Erdnüss for his help in preparing this manuscript.
No sources of funding were used to assist in the preparation of this article, and the authors have no conflicts of interest that are directly relevant to the content of this study.
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Kamin, W., Ehlich, H. In Vitro Comparison of Output and Particle Size Distribution of Budesonide from Metered-Dose Inhaler with Three Spacer Devices during Pediatric Tidal Breathing. Treat Respir Med 5, 503–508 (2006). https://doi.org/10.2165/00151829-200605060-00013
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DOI: https://doi.org/10.2165/00151829-200605060-00013