Device for the treatment of a medical fluid

• US 20030100882A1
• Filed: 11/26/2002
• Published: 05/29/2003
• Est. Priority Date: 11/26/2001
• Status: Active Grant

• Current Assignee: Fresenius Medical Care Deutschland GmbH (Fresenius Medical Care AG)
• Original Assignee: Fresenius Medical Care Deutschland GmbH (Fresenius Medical Care AG)
• Inventors: Beden, Josef, Scherer, Joerg, Schneider, Hans-Peter, Herklotz, Martin
• Granted Patent: US 7,503,915 B2
• Time in Patent Office: Days
• US Class Current: 604/403
• CPC Class Codes: A61M 1/3621 Extra-corporeal blood circuits single-needle circuits A61M1/30
• CPC Class Codes: A61M 1/362223 the interface being evacuated interfaces to enhance contact
• CPC Class Codes: A61M 1/367 Circuit parts not covered by the preceding subgroups of group A61M1/3621
• CPC Class Codes: A61M 2205/122 using evacuated interfaces to enhance contact

Abstract

The invention relates to a device for the treatment of a medical fluid, said device consisting of a permanently installed fluid treatment machine and a cassette with fluid-carrying channels as well as an elastic matt placed between these two items, with matt channels recessed in said elastic matt. The matt channels are provided with slits. Via the matt channels, an optimised vacuum distribution takes place and the slits serve the purpose of removing air between the cassette and the fluid treatment machine.

Claims

1. A device for the treatment of a medical fluid, said device consisting of a permanently installed fluid treatment machine, a cassette with fluid carrying channels and an elastic matt placed between the fluid treatment machine and the fluid-carrying channels, characterised in that

matt channels are recessed in the elastic matt, with the path of said channels following the fluid-carrying channels of the cassette and that slits are provided in the matt channels, which extend from the matt channels to the side facing the cassette.

2. The device according to claim 1, characterised in that the slits along the matt channels are repeatedly interrupted for short intervals.

3. The device according to claim 2, characterised in that the matt channels in the slitted areas are more deeply recessed than in the non-slitted areas.

4. The device according to claims 1 to 3, characterised in that the elastic matt has shallower connection channels compared to the matt channels, in particular for continuation around interruptions in the matt channels which are intended for the attachment of machine-mounted pump membranes and valves for example.

5. The device according to claims 1 to 4, characterised in that the elastic matt is exchangeable.

6. The device according to claims 1 to 5, characterised in that the elastic matt is sealable in the perimeter area of the cassette by putting pressure onto a circumferential seal edge contained within the cassette area.

8. An elastic matt for the use in a device according to one of the claims 1 to 6.

7. The device for the treatment of a medical fluid, said device consisting of a permanently installed fluid treatment machine and an elastic matt for attaching a cassette with fluid-carrying channels, characterised in that

matt channels are recessed in the elastic matt with the path of said channels following the fluid-carrying channels of the attachable cassette and that slits are provided in the matt channels with said slits extending from the matt channels to the side facing the attachable cassette.