Implantable drug infusion reservoir

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/142 (2006.01) A61M 5/145 (2006.01) A61M 37/00 (2006.01)

Patent

CA 2111462

An implantable infusion reservoir (1) having a resilient foam member (14) in a rigid housing (10) to urge fluid (53) to an implantation site. The foam member compresses upon charging and then expands to maintain a predetermined pressure characteristic within the fluid. The foam replaces the previously used two-phase propellent and eliminates the need for a hermetic metal bellows. The foam may be either closed celled or open celled, with or without a barrier skin (16). The device can be conformal to any desired shape and employ various metering techniques (30, 32, 40) to deliver accurate quantities of fluid.

Un réservoir d'infusion implantable (1) constitué d'un élément de mousse souple (14) dans un boîtier rigide (10) pour administrer un fluide (53) dans un site d'implantation. L'élément de mousse se comprime au moment du chargement, puis se dilate pour maintenir une pression prédéterminée dans le fluide. La mousse remplace l'agent propulseur à deux phases antérieurement utilisé et élimine la nécessité d'utiliser des soufflets métalliques hermétiques. La mousse peut être à alvéoles ouverts ou fermés, avec ou sans peau (16). Le dispositif peut prendre la forme désirée et fait appel à diverses techniques de dosage (30, 32, 40) pour l'administration de quantités précises de fluide.

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