Multi-dose insufflator for medicaments in powder form

A - Human Necessities – 61 – M

Patent

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Details

A61M 11/02 (2006.01) A61M 15/00 (2006.01) B05B 11/06 (2006.01) G01F 11/24 (2006.01) A61M 15/08 (2006.01)

Patent

CA 2070297

A multi-dose insufflator for the nasal administration of medicaments in fine or micronized powder form comprises a reservoir unit (34), a unit (60, 64) for withdrawing and metering the medicament contained in the reservoir unit, and an insufflation unit (42, 26) comprising a manually operated pump (42) for generating an air stream within a channel (26) for conveying an individual dose of medicament into the nasal cavity of the patient. The withdrawal and metering unit comprises a conveyor device (60) provided with at least one cup (64) for withdrawing a dose of medicament from the reservoir (34) and conveying it into an insufflation position. The cup (64) has a coaxial base hole (66) through which the air stream generated by the pump passes when the cup is in the insufflation position. The hole (66) has a size substantially smaller than the mouth of the cup (64) and such as to prevent the powder medicament falling through the hole, by virtue of the "arching" effect.

Un insufflateur multidose pour l'administration nasale de médicaments en poudre fine ou micronisée composé d'un réservoir (34), d'un dispositif (60, 64)) pour retirer et mesurer le médicament contenu dans le réservoir et d'un insufflateur (42, 26) comprenant une pompe fonctionnant manuellement (42) pour produire un jet d'air à l'intérieur d'un conduit (26) de façon à amener une dose individuelle d'un médicament dans la cavité nasale d'un patient. Le dispositif de retrait et de mesure comprend un conduit de transport (60) doté d'au moins un godet (64) servant à prendre une dose de médicament du réservoir (34) et à l'amener en position d'être insufflée. Le godet (64) a une ouverture coaxiale à la base (66) par laquelle passe le jet d'air produit par la pompe lorsque le godet est dans la position d'insufflation. La taille de l'ouverture (66) est substantiellement plus petite que celle de l'embouchure du godet (64) de façon à empêcher le médicament en poudre de tomber par l'ouverture, à cause de l'effet de "voûtage".

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