Compressed air inhaler for pulmonary application of...

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/72 (2006.01) A61K 9/12 (2006.01) A61K 9/127 (2006.01) A61M 11/06 (2006.01) A61M 15/00 (2006.01) B05B 7/00 (2006.01) B05B 7/06 (2006.01) A61K 9/51 (2006.01) B05B 7/06 (2006.01)

Patent

CA 2361807

The invention relates to a compressed air inhaler for the pulmonary application of a liposomal powder aerosol that carries active agents or is uncharged. The aim of the invention is to provide an inhaler by means of which the pulmonary application of especially liposomes that carry active agents is possible without forced breathing manoeuvres and by means of which the active agent can be transferred to the desired place of action in a sufficient amount without the active agent escaping. To this end, said compressed air inhaler comprises a receptacle (20) for the aqueous dispersion of liposomes. The liposomes carrying the active agents are dispersed in water in said receptacle. The receptacle is connected to an anatomising nozzle (1) and to a drying unit (17) via a device that doses liquids (19), whereby the drying unit can be an atomising chamber for spray drying the liposomes. An outlet (18) and a mouth piece are joined to said drying unit. The anatomising nozzle (1) is provided with separate supply channels (14, 16) for the compressed air and the dispersion of the liposomes (fig.1). The invention also relates to a novel powder aerosol consisting of liposomes or nanoparticles.

L'invention concerne un inhalateur à air comprimé qui permet d'administrer au niveau pulmonaire un aérosol constitué d'une poudre de liposomes contenant un principe actif ou non chargée. Son objectif est de proposer un inhalateur qui permette notamment d'administrer au niveau pulmonaire, sans obliger à des manoeuvres respiratoires forcées et au site d'action désiré, des liposomes porteurs d'un principe actif en une quantité suffisante et sans pertes. A cet effet, ledit inhalateur comprend un réservoir (20) pouvant contenir une dispersion aqueuse de liposomes, à l'intérieur duquel les liposomes contenant le principe actif sont dispersés dans l'eau. Le réservoir est relié, par l'intermédiaire d'un dispositif doseur (19) de liquide, à une tubulure de pulvérisation (1) et à une unité de séchage (17), telle qu'une chambre de vaporisation, qui sèche les liposomes par pulvérisation. Un dispositif de sortie (18), tel qu'un embout buccal, est raccordé à ladite unité de séchage. La tubulure de pulvérisation (1) comporte des orifices d'alimentation séparés (14, 16) pour l'air comprimé et pour la dispersion de liposomes (fig. 1). L'invention concerne également une poudre pour aérosol constituée de liposomes ou de nanoparticules.

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