# US 2023/0057779 A1 · Method and devices for determining a time point for measuring pressure measurements > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0057779 A1 - Document ID: US20230057779A1 - Status: Published application - Kind: A1 - Application number: 17/793,799 - Filed: 2021-01-27 - Published: 2023-02-23 - Earliest claimed: 2020-01-31 - Assignees: Fresenius Medical Care Deutschland GmbH - Applicants: Fresenius Medical Care Deutschland GmbH - Inventors: Maria Millan-Galante - Web page: https://patentgrep.com/patent/US20230057779A1 ## CPC - A61M 1/341: {by measuring the filtrate rate or volume} - A61M 1/1605: {Physical characteristics of the dialysate fluid} - A61M 1/342: {Adding solutions to the blood, e.g. substitution solutions (for preventing coagulation A61M1/3672)} - A61M 1/3609: {Physical characteristics of the blood, e.g. haematocrit, urea} - A61M 2205/18: with alarm - A61M 2205/3317: Electromagnetic, inductive or dielectric measuring means - A61M 2205/3331: Pressure; Flow - A61M 2230/207: hematocrit - A61M 2230/30: Blood pressure (A61M2230/04 takes precedence) - 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 present disclosure relates to a method for determining or recommending a time point for measuring a patient's pressure readings during a blood treatment session. The method encompasses monitoring the ultrafiltration rate with which the patient's blood is treated, a relative blood volume, and/or a sodium concentration or a change in any of these, for the existence of, or meeting any pre-determined criterion for the ultrafiltration, the relative blood volume, and/or the sodium concentration, or the change thereto. Furthermore, the method encompasses transmitting a signal to a blood pressure measuring device when the pre-determined criterion for the ultrafiltration rate, the relative blood volume, and/or the sodium concentration or the change thereto is met. ## Claims ### Claim at position 1 1-16. (canceled) ### Claim 17 A method for determining or recommending at least one time point for measuring pressure measurements on a patient during a treatment session in which the patient's blood is treated extracorporeally via a blood treatment apparatus, the method comprising: monitoring, during the treatment session, one or more of an ultrafiltration rate with which the patient's blood is treated, a relative blood volume, and a sodium concentration for one or more changes in or for fulfilling one or more pre-determined criteria, respectively, for one or more of the ultrafiltration rate, the relative blood volume, and the sodium concentration; and transmitting a signal to a blood pressure measuring device when any of the one or more pre-determined criteria or any of the one or more changes are met, respectively, for one or more of the ultrafiltration rate, the relative blood volume, and the sodium concentration. ### Claim 18 (depends on 17) The method according to claim 17, wherein the patient's blood is treated extracorporeally via the blood treatment apparatus by carrying out an ultrafiltration process. ### Claim 19 (depends on 17) The method according to claim 17, wherein a pre-determined criterion for the ultrafiltration rate is met when a minimum value for the ultrafiltration rate or a change in the ultrafiltration rate is reached, exceeded, or set for a pre-determined duration. ### Claim 20 (depends on 17) The method according to claim 17, wherein a pre-determined criterion for the relative blood volume is met when the relative blood volume falls below a minimum value or when a change in the relative blood volume exceeds a maximum value. ### Claim 21 (depends on 17) The method according to claim 17, wherein a pre-determined criterion for the sodium concentration is met when the sodium concentration falls below a minimum value or when a maximum value for a change in the sodium concentration has been exceeded. ### Claim 22 (depends on 21) The method according to claim 21, wherein the pre-determined criterion for the sodium concentration is met when the sodium concentration falls below the minimum value in dialysis liquid or when the maximum value for the change in the sodium concentration in the dialysis liquid has been exceeded. ### Claim 23 (depends on 17) The method according to claim 17, wherein a change or a pre-determined criteria for the ultrafiltration rate, the relative blood volume, or the sodium concentration is met if a pre-determined event occurs or is reached during a blood treatment profile that is set on the blood treatment apparatus for the ultrafiltration rate, the relative blood volume, or the sodium concentration, respectively. ### Claim 24 (depends on 17) The method according to claim 17, wherein the signal transmitted to the blood pressure measuring device comprises a signal for preparing the blood pressure measuring device for a procedure for measuring blood pressure readings of the patient. ### Claim 25 (depends on 24) The method according to claim 24, wherein the procedure comprises inflating a blood pressure cuff of the blood pressure measuring device. ### Claim 26 (depends on 17) The method according to claim 17, wherein the signal transmitted to the blood pressure measuring device comprises a signal for measuring a patient's arterial blood pressure reading or venous blood pressure reading. ### Claim 27 (depends on 17) The method according to claim 17, wherein monitoring one or more of the ultrafiltration rate, the relative blood volume, and the sodium concentration comprises reading out of at least one treatment parameter or treatment profile that is set on the blood treatment apparatus and used during the blood treatment session. ### Claim 28 A control device or closed-loop control device configured to carry out mechanical steps of a method for determining or recommending at least one time point for measuring pressure measurements on a patient during a treatment session in which the patient's blood is treated extracorporeally via a blood treatment apparatus, the method comprising: monitoring, during the treatment session, one or more of an ultrafiltration rate with which the patient's blood is treated, a relative blood volume, and a sodium concentration for one or more changes in or for fulfilling one or more pre-determined criteria, respectively, for one or more of the ultrafiltration rate, the relative blood volume, and the sodium concentration; and transmitting a signal to a blood pressure measuring device when any of the one or more pre-determined criteria or any of the one or more changes are met, respectively, for one or more of the ultrafiltration rate, the relative blood volume, and the sodium concentration. ### Claim 29 (depends on 28) The control device or closed-loop control device according to claim 28, wherein the patient's blood is treated extracorporeally via the blood treatment apparatus by carrying out an ultrafiltration process. ### Claim 30 (depends on 28) The control device or closed-loop control device according to claim 28, wherein the control device or closed-loop control device is configured for one or both of processing and evaluating one or both of an arterial blood pressure reading and a venous blood pressure reading. ### Claim 31 (depends on 30) The control device or closed-loop control device according to claim 30, wherein the control device or closed-loop control device is configured to trigger an alarm, to cause an interruption or a termination of an ultrafiltration, to cause another blood pressure measurement to be determined and to evaluate the other blood pressure measurement, to cause an on-line bolus to be administered, and/or to output corresponding information for attention of a user should an evaluation of the arterial blood pressure reading and/or of the venous blood pressure reading show that the patient's blood pressure has reached or is no longer within pre-determined ranges. ### Claim 32 A medical set comprising: a blood pressure measuring device; and a control device or closed-loop control device configured to carry out mechanical steps of a method for determining or recommending at least one time point for measuring pressure measurements on a patient during a treatment session in which the patient's blood is treated extracorporeally via a blood treatment apparatus, the method comprising: monitoring, during the treatment session, one or more of an ultrafiltration rate with which the patient's blood is treated, a relative blood volume, and a sodium concentration for one or more changes in or for fulfilling one or more pre-determined criteria, respectively, for one or more of the ultrafiltration rate, the relative blood volume, and the sodium concentration; and transmitting a signal to a blood pressure measuring device when any of the one or more pre-determined criteria or any of the one or more changes are met, respectively, for one or more of the ultrafiltration rate, the relative blood volume, and the sodium concentration. ### Claim 33 (depends on 32) The medical set according to claim 32, wherein the patient's blood is treated extracorporeally via the blood treatment apparatus by carrying out an ultrafiltration process. ### Claim 34 (depends on 32) The medical set according to claim 32, further comprising the blood treatment apparatus. ### Claim 35 (depends on 34) The medical set according to claim 34, wherein the blood treatment apparatus comprises a hemodialysis apparatus, a hemofiltration apparatus, or a hemodiafiltration apparatus for acute or chronic renal replacement therapy. ### Claim 36 (depends on 35) The medical set according to claim 35, wherein the renal replacement therapy comprises continuous or intermittent procedures. ### Claim 37 (depends on 32) The medical set according to claim 32, further comprising sensors arranged and configured to extracorporeally measure the sodium concentration in dialysis liquid or in dialysate and/or measure the relative blood volume.