# US 2008/0185322 A1 · Device for the Removal of Substances From Liquids in Particular Blood > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0185322 A1 - Document ID: US20080185322A1 - Status: Published application - Kind: A1 - Application number: 11/884,341 - Filed: 2006-02-01 - Published: 2008-08-07 - Earliest claimed: 2005-02-17 - Assignees: Fresenius Medical Care Deutschland GmbH - Inventors: Horst Christmann - Web page: https://patentgrep.com/patent/US20080185322A1 ## CPC - A61M 1/3472: {with treatment of the filtrate} - A61M 1/30: Single needle dialysis {; Reciprocating systems, alternately withdrawing blood from and returning it to the patient, e.g. single-lumen-needle dialysis or single needle systems for hemofiltration or pheresis} - A61M 1/303: {having a reservoir for treated blood to be returned} - A61M 1/3417: {using distinct filters for dialysis and ultra-filtration} - A61M 1/3486: {Biological, chemical treatment, e.g. chemical precipitation; treatment by absorbents} - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract The invention relates to an apparatus for the elimination of substances from liquids, in particular from blood, comprising a primary circuit for the liquid to be treated, a filter which is integrated therein and at whose secondary side a secondary circuit is connected in which at least one adsorber is arranged, wherein respective pumps are provided in the primary and secondary circuits. In accordance with the invention, an expansion vessel in which liquid of the secondary circuit is discontinuously taken up and output again is integrated in the secondary circuit. ## Claims ### Claim 1 An apparatus for the elimination of substances from liquids, in particular from blood, comprising a primary circuit (12) for the liquid to be treated, a filter (10) which is integrated therein and at whose secondary side a secondary circuit (14) is connected in which at least one blood treatment element, in particular an adsorber (38, 40), is arranged, wherein respective pumps (16, 18) are provided in the primary and secondary circuits, characterized in that an expansion vessel (28) in which liquid of the secondary circuit (14) is discontinuously taken up and output again is integrated in the secondary circuit (14). ### Claim 2 (depends on 1) An apparatus in accordance with claim 1, characterized in that valves (20, 22 or 24, 26) are present in the secondary circuit (14) for the distribution of the liquid of the secondary circuit (14) in the discontinuous filling and emptying of the expansion vessel (28). ### Claim 3 (depends on 1) An apparatus in accordance with claim 1, characterized in that the filling level of the expansion vessel (28) can be detected via a pressure sensor (44). ### Claim 4 (depends on 3) An apparatus in accordance with claim 3, characterized in that the pump of the secondary circuit (14) and the pressure sensor (44) are integrated in a module. ### Claim 5 (depends on 1) An apparatus in accordance with claim 1, characterized in that blood circulates in the primary circuit (12) and plasma in the secondary circuit (14). ### Claim 6 (depends on 5) An apparatus in accordance with claim 5, characterized in that a membrane filter (10), preferably made from polysulfone, is used as the filter. ### Claim 7 (depends on 1) An apparatus in accordance with claim 1, characterized in that a hemodialyzer (42) is additionally integrated in the primary circuit (12) for the simultaneous dialysis treatment. ### Claim 8 (depends on 2) An apparatus in accordance with claim 2, characterized in that the filling level of the expansion vessel (28) can be detected via a pressure sensor (44). ### Claim 9 (depends on 2) An apparatus in accordance with claim 2, characterized in that blood circulates in the primary circuit (12) and plasma in the secondary circuit (14). ### Claim 10 (depends on 3) An apparatus in accordance with claim 3, characterized in that blood circulates in the primary circuit (12) and plasma in the secondary circuit (14). ### Claim 11 (depends on 4) An apparatus in accordance with claim 4, characterized in that blood circulates in the primary circuit (12) and plasma in the secondary circuit (14). ### Claim 12 (depends on 2) An apparatus in accordance with claim 2, characterized in that a hemodialyzer (42) is additionally integrated in the primary circuit (12) for the simultaneous dialysis treatment. ### Claim 13 (depends on 3) An apparatus in accordance with claim 3, characterized in that a hemodialyzer (42) is additionally integrated in the primary circuit (12) for the simultaneous dialysis treatment. ### Claim 14 (depends on 4) An apparatus in accordance with claim 4, characterized in that a hemodialyzer (42) is additionally integrated in the primary circuit (12) for the simultaneous dialysis treatment. ### Claim 15 (depends on 5) An apparatus in accordance with claim 5, characterized in that a hemodialyzer (42) is additionally integrated in the primary circuit (12) for the simultaneous dialysis treatment. ### Claim 16 (depends on 6) An apparatus in accordance with claim 6, characterized in that a hemodialyzer (42) is additionally integrated in the primary circuit (12) for the simultaneous dialysis treatment.