Implantable medication dosage device for injection of a liquid medication into a living organism
First Claim
1. In an implantable medication dosage device for injection of a liquid medication into a living organism, said device comprising a medication track being formed by a subcutaneous refilling septum connected by a hose to a medication reservoir, said medication reservoir being connected by a second hose to a remotely controllable dosage pump having an output hose connected to a catheter to supply the medication conveyed by the medication dosage pump to the organism, the improvements comprising a filter arrangement being arranged in the medication track on the second hose extending between the medication reservoir and the medication dosage pump, said filter arrangement being constructed of at least two membrane filters, with the first membrane filter being composed of a non-woven polypropylene fiber-fleece oriented opposite to a flow direction of the medication and the second membrane being arranged downstream of the first membrane and being composed of a fabric of polypropylene.
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Accused Products
Abstract
A filter arrangement is inserted in a medication track of an implantable dosage device between a medication reservoir and the medication dosage pump, characterized by the arrangement being fashioned of at least two-ply membrane filter, whose first membrane is composed of non-woven polypropylene fiber-fleece oriented opposite the flow direction of the medication and the second membrane being arranged downstream of the first membrane and being composed of a polypropylene fabric.
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Citations
8 Claims
- 1. In an implantable medication dosage device for injection of a liquid medication into a living organism, said device comprising a medication track being formed by a subcutaneous refilling septum connected by a hose to a medication reservoir, said medication reservoir being connected by a second hose to a remotely controllable dosage pump having an output hose connected to a catheter to supply the medication conveyed by the medication dosage pump to the organism, the improvements comprising a filter arrangement being arranged in the medication track on the second hose extending between the medication reservoir and the medication dosage pump, said filter arrangement being constructed of at least two membrane filters, with the first membrane filter being composed of a non-woven polypropylene fiber-fleece oriented opposite to a flow direction of the medication and the second membrane being arranged downstream of the first membrane and being composed of a fabric of polypropylene.
Specification