# US 11,439,737 B2 · Device for extracorporeal blood treatment and method for operating an extracorporeal blood treatment device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,439,737 B2 - Document ID: US11439737B2 - Status: Granted - Kind: B2 - Application number: 16/500,822 - Filed: 2018-04-10 - Published: 2020-04-09 - Granted: 2022-09-13 - Earliest claimed: 2017-04-11 - Assignees: Fresenius Medical Care Deutschland GmbH - Applicants: Fresenius Medical Care Deutschland GmbH - Inventors: Benedict Glaser - Web page: https://patentgrep.com/patent/US11439737B2 ## CPC - A61M 1/16: with membranes - A61M 1/1656: {Apparatus for preparing dialysates} - A61M 1/1621: {Constructional aspects thereof (semi-permeable membranes for separation processes characterised by their properties B01D69/00; semi permeable membranes characterised by their material B01D71/00)} - A61M 1/1686: {by heat} - H05K 7/20254: {Cold plates transferring heat from heat source to coolant} - H05K 7/20272: {Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds} - H05K 7/20281: {Thermal management, e.g. liquid flow control} - A61M 2205/3368: Temperature - A61M 2205/3606: cooled - A61M 2205/366: by liquid heat exchangers - A61M 2205/50: with microprocessors or computers - 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)} - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract The invention relates to a device for extracorporeal blood treatment, having a hydraulic system B which comprises multiple lines (7), (9) for providing dialysate for a dialyser (3) and having a control system (15) which comprises multiple electrical components (17A), (17B), (17C). The invention also relates to a method for operating a device for extracorporeal blood treatment which has a hydraulic system which comprises multiple lines for providing dialysate for a dialyser and a control system which comprises multiple electrical components, wherein the dialysate is produced using a liquid supplied to the device for extracorporeal blood treatment. The extracorporeal blood treatment device is a blood treatment device which has a central connection (11) to allow a liquid, in particular permeate (pure water), to be supplied to the machine. The blood treatment device is characterised by a cooling apparatus (19) for cooling at least one of the electrical components (17A), (17B), (17C) of the control system (15), said cooling apparatus using the liquid, in particular permeate (pure water), supplied centrally to the device to dissipate heat from the electrical components. The cooling apparatus (19) has at least one heat sink (21) which can be cooled with a liquid and is in thermal contact with the at least one electrical component (17A), (17B), (17C), wherein the cooling apparatus (19) has at least one inlet (22A) which is fluid-connected to the connection (11) for the inflow of a liquid and at least one outlet (22B) which is fluid-connected to a drain (10), (31). ## Claims ### Claim 1 Device for extracorporeal blood treatment, comprising a hydraulic system that has a plurality of lines and is intended for providing dialysate for a dialysis treatment, and a control system comprising at least one electrical component, the hydraulic system having at least one port for supplying a fluid to the device for extracorporeal blood treatment, wherein the device for extracorporeal blood treatment has a cooling apparatus for cooling the electrical component or at least one of the electrical components of the control system, which apparatus has at least one heat sink that can be cooled by a fluid and is in thermal contact with at least one electrical component, the cooling apparatus having at least one inlet that is in fluid connection with the port for supplying a fluid, and having at least one outlet that is in fluid connection with a drain and wherein the hydraulic system has a fluid-preparation apparatus having an inlet, the port for supplying a fluid via a fluid line being connected to the inlet of the fluid-preparation apparatus, and a bypass line coming off the supply line, which bypass line is in fluid connection with the drain. ### Claim 2 (depends on 1) Device for extracorporeal blood treatment according to claim 1, wherein the fluid-preparation apparatus has an input chamber for collecting a fluid, the inlet of the fluid-preparation apparatus being an inlet of the input chamber. ### Claim 3 (depends on 1) Device for extracorporeal blood treatment according to claim 1, wherein means for interrupting or adjusting the fluid flow in the supply line are provided downstream of the branch-off of the bypass line from the supply line. ### Claim 4 (depends on 1) Device for extracorporeal blood treatment according to claim 1, wherein the supply line comprises a first portion that connects the port for supplying a fluid to the inlet of the cooling apparatus, and a second portion that connects the outlet of the cooling apparatus to the inlet of the fluid-preparation apparatus. ### Claim 5 (depends on 1) Device for extracorporeal blood treatment according to claim 1, wherein a first portion of the bypass line connects the port for supplying fluid or the supply line to the inlet of the cooling apparatus, the outlet of the cooling apparatus being in fluid connection with a drain via a second portion of the bypass line. ### Claim 6 (depends on 1) Device for extracorporeal blood treatment according to claim 1, wherein means for interrupting or adjusting the fluid flow are provided in the bypass line. ### Claim 7 (depends on 6) Device for extracorporeal blood treatment according to claim 6, wherein the cooling apparatus has a temperature sensor for measuring the temperature of an electrical component that is in thermal contact with the heat sink, and a control unit that actuates the means for interrupting or adjusting the fluid flow in the bypass line such that the temperature is below a specified threshold value. ### Claim 8 (depends on 1) Device for extracorporeal blood treatment according to claim 1, wherein drain is independent of an additional drain for the hydraulic system. ### Claim 9 (depends on 1) Method for operating the device of claim 1 for extracorporeal blood treatment, the dialysate being produced using a fluid that is supplied to the device for extracorporeal blood treatment, wherein, in order to cool at least one component of the control system, said method comprising bringing the component into thermal contact with a heat sink that is cooled using the fluid intended for producing the dialysate. ### Claim 10 (depends on 9) Method according to claim 9, wherein the fluid used to produce the dialysate is permeate. ### Claim 11 (depends on 1) Method for operating the device of claim 1 for extracorporeal blood treatment, wherein the device for extracorporeal blood treatment providing an operating mode for carrying out a hot-water disinfection of the hydraulic system, in which a fluid heated to a specified temperature flows through at least some of the lines of the hydraulic system, said method comprising during the hot-water disinfection operating mode, cooling the heat sink using a fluid that is supplied to the device for extracorporeal blood treatment, while the fluid heated to a specified temperature flows through at least some of the lines of the hydraulic system. ### Claim 12 (depends on 11) Method according to claim 11, wherein the fluid used for the hot-water disinfection is permeate. ### Claim 13 (depends on 9) Method according to claim 9, wherein the temperature of the at least one component is measured, and the supply of the fluid that is supplied to the device for extracorporeal blood treatment is adjusted such that the temperature of the at least one component is below a specified threshold value. ### Claim 14 (depends on 1) Device for extracorporeal blood treatment according to claim 1, wherein the drain is independent of a drain for dialysate during treatment.