Inhaler device for moisture sensitive drugs and method of...

A - Human Necessities – 61 – M

Patent

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Details

A61M 15/00 (2006.01) B65D 81/26 (2006.01)

Patent

CA 2623658

A dry powder inhaler device (1) having an air inlet system (21, 22, 23) and a mouthpiece (11) is disclosed. The inhaler (1) includes a first inner airflow channel (50) connecting the mouthpiece (11) and the inlet system (21, 22, 23) and having a dose entrainment region (19). A desiccant material (45) is provided in connection with the first channel (50) downstream of the inlet system (21, 22, 23) but upstream of the dose entrainment region (19). The inhaler (1) also includes a second inner airflow channel (60) connected between the mouthpiece (11) and the inlet system (21, 22, 23) but bypasses the desiccant material (45). A switch arrangement (30, 31, 32) is provided for switching between the first channel (50) and the second channel (60) during an applied suction action to induce an airflow from the from the inlet system (21, 22, 23) through a selected airflow channel and to the mouthpiece (11).

La présente invention concerne un dispositif d~inhalation de poudre sèche (1) comprenant un système d~arrivée d~air (21, 22, 23) et un embout buccal (11). L~inhalateur (1) comprend un premier canal d~air intérieur (50) connectant l~embout buccal (11) et le système d~arrivée d~air (21, 22, 23) et comprenant une région d~entraînement de dose (19). Une matière dessicative (45) est fournie en rapport avec le premier canal (50) descendant vers le système d~arrivée d~air (21, 22, 23) mais remontant dans la région d~entraînement de dose (19). L~inhalateur (1) comprend un premier canal d~air intérieur (60) connectant l~embout buccal (11) et le système d~arrivée d~air (21, 22, 23) et comprenant une région d~entraînement de dose (45). Un arrangement de commutateur (30, 31, 32) est fourni pour basculer entre le premier canal (50) et le second (60) lors d~une action de succion appliquée pour induire un flux d~air depuis le système d~arrivée d'air (21, 22, 23) par le biais d~un canal d~arrivée d~air sélectionné et vers l~embout buccal (11).

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