(475ab) Design of Dry Powder Inhalation by a Novel Supercritical Freeze Granulation
AIChE Annual Meeting
2006
2006 Annual Meeting
US - Japan Joint Topical Conference on Medical Engineering, Drug Delivery Systems and Therapeutic Systems
General Papers on Medical Engineering, Drug Delivery and Therapeutic Systems: Poster Session
Wednesday, November 15, 2006 - 6:30pm to 9:00pm
In the particulate design for dry powder inhalation (DPI), the drug particles are required to have a good flowability in handling and dispersibility in delivering the drug to lung in order to treat effectively the pulmonary and systemic diseases. In this study, the preparation process of drug particles for DPI using a novel supercritical carbon dioxide freeze granulation based on the rapid expansion of supercritical solutions (RESS process) has been developed. When a drug dissolved into supercritical carbon dioxide is sprayed from a nozzle, frozen carbon dioxide lumps generate owing to the rapid temperature drop (i.e., Joule-Thomson effect), resulting in the granulation of fine drug particles. The granules obtained under the conditions of lower temperatures and higher pressures of supercritical carbon dioxide, in which more frozen carbon dioxide lumps generate, have a good flowability and dispersibility because of increasing in the granule size and decreasing in the bulk density.
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2006 Annual Meeting
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US - Japan Joint Topical Conference on Medical Engineering, Drug Delivery Systems and Therapeutic Systems only
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