Device and method for deaggregating powder 854

Details Device and method for deaggregating powder 854 Device and method for deaggregating powder 854

A - Human Necessities

61

M

A61M 15/00 (2006.01) F15D 1/00 (2006.01)

Patent

CA 2710274

The invention relates to a device (1) for inhalation of at least one air stream carrying a dose of medicament powder (2). The device comprises a flow passage (4) passing a powder-containing cavity (5). A part of said flow passage (4) propagates along a flat surface region (7). The flat surface region (7) comprises a cavity opening (20) into said powder- containing cavity (5). The passing of an air stream along said flat surface region (7) and outside said cavity (5) generates an eddy in the cavity (5) and the generated eddy contributes to deaggregation of the powder (2) in said cavity (5) and emptying of the powder (2) from said cavity (5). Furthermore, the invention relates to the use of a shear driven cavity principle on such a device (1) and a method of releasing medicament powder (2).

L'invention concerne un dispositif (1) d'inhalation d'au moins un courant d'air portant une dose de médicament en poudre (2). Le dispositif comprend un passage d'écoulement (4) passant par une cavité contenant une poudre (5). Une partie dudit passage d'écoulement (4) se propage le long d'une région à surface plate (7). La région à surface plate (7) comprend une ouverture de cavité (20) débouchant dans ladite cavité contenant une poudre (5). Le passage d'un courant d'air le long de ladite région à surface plate (7) et à l'extérieur de ladite cavité (5) génère un tourbillon dans la cavité (5) et le tourbillon généré contribue à désagréger la poudre (2) dans ladite cavité (5) et à chasser la poudre (2) de ladite cavité (5). De plus, l'invention concerne l'utilisation du principe de la cavité régi par cisaillement sur un dispositif de ce type (1) et un procédé de libération du médicament en poudre (2).

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