Devices and methods for controlled delivery from a drug...

A - Human Necessities – 61 – M

Patent

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Details

A61M 31/00 (2006.01) A61K 9/00 (2006.01) A61M 5/142 (2006.01) A61M 5/168 (2006.01)

Patent

CA 2429945

The invention features a plug for use with a drug delivery device, wherein the plug defines an expansion control channel, which accommodates thermal expansion of a formulation in a reservoir of a drug delivery device, and an exit channel. In one embodiment, the plug comprises an inner plug member and an outer plug member, which members define an expansion control channel to facilitate release of entrapped air and to accommodate thermal expansion of formulation from the sealed drug reservoir. The plug further defines an exit channel, and may optionally further comprise a frit positioned within the flow pathway just prior to the delivery outlet, or both.

L'invention concerne un bouchon conçu pour être mis en application sur un dispositif d'administration de médicaments, ce bouchon définissant un canal de régulation de dilatation absorbant la dilatation thermique d'une formulation contenue dans un réservoir du dispositif d'administration de médicaments, ainsi qu'un canal de sortie. Dans un mode de réalisation, ce bouchon est composé d'un bouchon intérieur et d'un bouchon extérieur, ces éléments de bouchon définissant un canal de régulation de dilatation facilitant la libération de l'air piégé et absorbant la dilatation thermique de la formulation contenue dans le réservoir de médicaments scellé. Ce bouchon définit, de plus, un canal de sortie et peut éventuellement comprendre également un verre de scellement placé à l'intérieur du trajet d'écoulement immédiatement avant la sortie, ou les deux.

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