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AssigneeBoehringer Ingelheim International GmbH
InventorsMatthias Hausmann, Steffen Schuy, Joachim Eicher, Johannes Geser, Martin Meisenheimer, Florian Witte
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The invention relates to a medical hand-held device, in particular an atomizer (1), for dispensing a liquid pharmaceutical preparation from a container. The pharmaceutical preparation can be based, for example, on an alcoholic solvent. The proposed atomizer has a discharge nozzle for the pharmaceutical preparation. Located upstream from the discharge nozzle (12d, 12e) there is a multiple-stage filter system, which is composed of at least three filtering components (27, 28, 12f). The filters differ from one another in terms of their filter threshold and their filter materials and/or filter effect. In particular, the use of a filter made of sintered metal is proposed in order to avoid penetration of particles into a microstructured component (12), which can also contain a very fine filter in front of the nozzle. Alternatively or in addition, it is also proposed to use an adsorption filter in the flow path between a coarse filter and the microstructured component.
Device for administering a liquid medical formulation which is held in a container (3) inserted in the device and is expelled from the device through at least one nozzle opening (12e), wherein, before flowing through the at least one nozzle opening (12e), the liquid medical formulation flows through a very fine filter (12f) which is formed by a microstructured component (12), and wherein a pre-filter (27) is arranged in front of the microstructured component (12) inside the device, in the flow path of the liquid,
Dependencies are inferred from the claim text.