# US 12,005,175 B2 · Blood purification device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,005,175 B2 - Document ID: US12005175B2 - Status: Granted - Kind: B2 - Application number: 17/417,670 - Filed: 2019-08-29 - Published: 2022-04-14 - Granted: 2024-06-11 - Earliest claimed: 2018-12-28 - Assignees: Nikkiso Co., Ltd. - Applicants: Nikkiso Company Limited - Inventors: Tomohiro Furuhashi; Kazuhide Ono; Hideto Maki; Ferenc Kazinczi - Web page: https://patentgrep.com/patent/US12005175B2 ## CPC - A61M 1/1643: {with weighing of fresh and used dialysis fluid} - A61M 1/3644: {Mode of operation} - A61M 1/3607: {Regulation parameters} - A61M 1/3624: {Level detectors; Level control} - A61M 1/367: {Circuit parts not covered by the preceding subgroups of group A61M1/3621} - A61M 1/3623: {Means for actively controlling temperature of blood} - A61M 2205/18: with alarm - A61M 2205/3393: by weighing the reservoir - A61M 2205/502: User interfaces, e.g. screens or keyboards - A61M 2205/60: with identification means - 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 A blood purification device includes a blood circuit for extracorporeally circulating blood of a patient; a liquid supply circuit for supplying a supply liquid to the blood circuit or to a blood purifier provided on the blood circuit and a waste liquid circuit for discharging the waste liquid from the blood purifier. Each of the blood circuit, the liquid supply circuit and the waste liquid circuit comprises a flexible tube. The blood purification device comprises a tube identification unit that performs a tube identification process for identifying a tube used for the blood circuit, the liquid supply circuit or the waste liquid circuit or determining whether or not there is an abnormality in the tube, based on an amount of liquid sent from a peristaltic pump provided on the blood circuit, the liquid supply circuit or the waste liquid circuit, or pressure fluctuation in the circuit, caused when driving the pump for a predetermined time. ## Claims ### Claim 1 A blood purification device, comprising: a blood circuit for extracorporeally circulating blood of a patient; a liquid supply circuit for supplying a supply liquid to the blood circuit or to a blood purifier provided on the blood circuit; a waste liquid circuit for discharging the waste liquid from the blood purifier, and a removed water amount detection unit for detecting an amount of removed water based on a supplied amount of the supply liquid and a discharged amount of the waste liquid; wherein each of the blood circuit, the liquid supply circuit and the waste liquid circuit comprises a flexible tube, and the device comprises a tube identification unit that performs a tube identification process for identifying a tube used for the blood circuit, the liquid supply circuit or the waste liquid circuit or determining whether or not there is an abnormality in the tube, based on an amount of liquid sent from a peristaltic pump provided on the blood circuit, the liquid supply circuit or the waste liquid circuit, or pressure fluctuation in the circuit, caused when driving the pump for a predetermined time; and wherein the removed water amount detection unit comprises a supply liquid subdivision chamber being provided on the liquid supply circuit and temporarily storing the supply liquid, a waste liquid subdivision chamber being provided on the waste liquid circuit and temporarily storing the waste liquid, and a weight detection mechanism for detecting a total weight of the supply liquid subdivision chamber and the waste liquid subdivision chamber, and the tube identification unit uses the weight detection mechanism of the removed water amount detection unit and detects the amount of liquid sent from the pump provided on the liquid supply circuit or the waste liquid circuit when driving the pump for a predetermined time. ### Claim 2 (depends on 1) The blood purification device according to claim 1, wherein the tube identification unit performs the tube identification process during when priming each circuit with a liquid before blood purification treatment. ### Claim 3 (depends on 1) The blood purification device according to claim 1, comprising: an alarm unit that issues an alarm when a tube actually used for each circuit and identified by the tube identification unit does not match a tube of each circuit in a preset setting. ### Claim 4 (depends on 3) The blood purification device according to claim 3, comprising: a display for displaying a predetermined screen, wherein the alarm unit issues an alarm by displaying an alarm screen corresponding to the details of the alarm on the display. ### Claim 5 (depends on 4) The blood purification device according to claim 4, wherein a setting change reception part for receiving an operation to change a preset tube setting is displayed on the alarm screen. ### Claim 6 A blood purification device, comprising: a blood circuit for extracorporeally circulating blood of a patient a liquid supply circuit for supplying a supply liquid to the blood circuit or to a blood purifier provided on the blood circuit and a waste liquid circuit for discharging the waste liquid from the blood purifier, wherein each of the blood circuit, the liquid supply circuit and the waste liquid circuit comprises a flexible tube, and the device comprises a tube identification unit that performs a tube identification process for identifying a tube used for the blood circuit, the liquid supply circuit or the waste liquid circuit or determining whether or not there is an abnormality in the tube, based on an amount of liquid sent from a peristaltic pump provided on the blood circuit, the liquid supply circuit or the waste liquid circuit, or pressure fluctuation in the circuit, caused when driving the pump for a predetermined time; and wherein the tube identification unit determines whether or not there is an abnormality in the tube in use, based on whether or not the amount of liquid sent from the pump or the pressure fluctuation when driving the pump for a predetermined time falls within a preset normal range. ### Claim 7 (depends on 1) The blood purification device according to claim 1, comprising: a removed water amount detection unit for detecting an amount of removed water based on a supplied amount of the supply liquid and a discharged amount of the waste liquid, wherein the removed water amount detection unit comprises a supply liquid subdivision chamber being provided on the liquid supply circuit and temporarily storing the supply liquid, a waste liquid subdivision chamber being provided on the waste liquid circuit and temporarily storing the waste liquid, and a weight detection mechanism for detecting a total weight of the supply liquid subdivision chamber and the waste liquid subdivision chamber, and the tube identification unit uses the weight detection mechanism of the removed water amount detection unit and detects the amount of liquid sent from the pump provided on the liquid supply circuit or the waste liquid circuit when driving the pump for a predetermined time. ### Claim 8 A blood purification device, comprising: a blood circuit for extracorporeally circulating blood of a patient a liquid supply circuit for supplying a supply liquid to the blood circuit or to a blood purifier provided on the blood circuit and a waste liquid circuit for discharging the waste liquid from the blood purifier, wherein each of the blood circuit, the liquid supply circuit and the waste liquid circuit comprises a flexible tube, and the device comprises a tube identification unit that performs a tube identification process for identifying a tube used for the blood circuit, the liquid supply circuit or the waste liquid circuit or determining whether or not there is an abnormality in the tube, based on an amount of liquid sent from a peristaltic pump provided on the blood circuit, the liquid supply circuit or the waste liquid circuit, or pressure fluctuation in the circuit, caused when driving the pump for a predetermined time; and a pump speed correction unit that corrects a pump speed of the pump driven at the time of the measurement, based on a measurement result of the amount of liquid sent from the pump or the pressure fluctuation during the tube identification process.