Inhaler dosing device

A - Human Necessities – 61 – M

Patent

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Details

A61M 15/00 (2006.01)

Patent

CA 2390559

A dosing device of an inhaler for administration of a pharmaceutical composition during a prolonged time period is disclosed. The principle of the inspiratory administration is basically utilizing known techniques for administering of the pharmaceutical composition, whereby the fine powder to be administered is gathered as extended doses (15, 16) of powder onto a surface of a dosing member. The disposable dosing member (10) contains a number of prefabricated dose strings to be accessed. A dosing element (7) having an adapted opening moves along an extended string of the dosing member during the administration to in this manner prolong the time period, during which the pharmaceutical composition is released from the dosing member (10) into an air-stream of the inhaler during the inspiration. The relative motion of the dosing element (7) is either obtained by rotating the dosing member itself or moving the dosing element along the surface of the dosing member. Thereby an evenly distributed amount of powder in the inspiration air is obtained during, for instance, one to two seconds of inspiration in accordance with the motion of the dosing element (7) relative to the extended dose of pharmaceutical composition.

La présente invention concerne un doseur pour inhalateur destiné à l'administration d'une composition pharmaceutique pendant un temps assez long. Le principe de l'administration par inspiration consiste essentiellement à utiliser les techniques connues pour administrer une composition pharmaceutique, la poudre fine à administrer étant réunie sous forme de doses étendues (15, 16) de poudre sur la surface d'un élément doseur. L'élément doseur jetable (10) contient un certain nombre de lignes de doses préparées accessibles. Un élément doseur (7) pourvu d'une ouverture adaptée se déplace le long d'une ligne étendue de l'élément doseur au cours de l'administration afin de prolonger le temps de libération de la composition pharmaceutique de l'élément doseur (10) dans un conduit aérien de l'inhalateur, au cours de l'inspiration. Le mouvement relatif de l'élément doseur (7) s'obtient soit en mettant en rotation l'élément doseur lui-même, soit en le déplaçant le long de sa surface. Ainsi, on obtient dans l'air inspiré une quantité de poudre régulièrement administrée pendant une ou deux secondes d'inspiration, selon le mouvement de l'élément doseur (7) par rapport à la dose étendue de la composition pharmaceutique.

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