# US 2026/0224810 A1 · System and method for detecting over-infusion due to mechanical failure of an infusion pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0224810 A1 - Document ID: US20260224810A1 - Status: Published application - Kind: A1 - Application number: 19/153,932 - Filed: 2023-02-07 - Published: 2026-08-06 - Earliest claimed: 2023-02-07 - Assignees: CareFusion 303, Inc. - Applicants: Carefusion 303, Inc. - Inventors: Richard Stor WU; Joseph H. GRUCHACZ; Jay DAVE - Web page: https://patentgrep.com/patent/US20260224810A1 ## CPC - A61M 5/16854: {by monitoring line pressure} - A61M 5/14228: {with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member} - A61M 5/172: electrical or electronic - A61M 2205/18: with alarm - A61M 2205/3351: Controlling upstream pump pressure - A61M 2205/583: by visual feedback - 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 An apparatus, method, and system for detecting an over-infusion of a fluid due to a mechanical failure of an infusion pump. A pressure sensor of an infusion pump measures a pressure of a fluid in an infusion line loaded into the pump over at least a portion of a pumping cycle. The pumping cycle includes application of at least one occluder and at least one pumping finger to the infusion line to move the fluid through the infusion line. A control unit associated with the pump determines a metric based on measuring the pressure over the at least the portion of the pumping cycle, determines whether the metric satisfies a fault threshold corresponding to a pump fault and, responsive to the determination, provides an alert indicating the pump fault and terminates or reduces the pumping of the fluid through the infusion line. ## Claims ### Claim 1 A system for detecting an over-infusion of a fluid, comprising: an infusion pump; an pressure sensor disposed within the infusion pump to measure pressure of a fluid in an infusion line loaded into the infusion pump; and a control unit configured to: measure, over at least a portion of a pumping cycle of the infusion pump, with the pressure sensor, a pressure of the fluid in the infusion line loaded into the infusion pump, the pumping cycle including application of at least one occluder and at least one pumping finger to the infusion line to move the fluid through the infusion line; determine a metric based on measuring the pressure over the at least the portion of the pumping cycle; determine that the metric corresponds to a fault threshold associated with the at least the portion of the pumping cycle corresponding to an over-infusion fault; and provide, for display on a display device associated with the infusion pump, an alert indicating the over-infusion fault. ### Claim 2 (depends on 1) The system of claim 1, wherein the control unit is further configured to: cause, responsive to determining that the metric corresponds to the fault threshold, the infusion pump to terminate or reduce pumping of the fluid through the infusion line. ### Claim 3 (depends on 1) The system of claim 1, or wherein measuring the pressure over the at least the portion of the pumping cycle comprises measuring a plurality of pressure values over a fill phase, and wherein the metric is determined for the fill phase. ### Claim 4 (depends on 1) The system claim 1, further comprising: a pumping cam configured to operate at least one occluder valve and pumping mechanism of the infusion pump according to a rotation of the pumping cam, wherein measuring the pressure over the at least the portion of the pumping cycle comprises measuring a plurality of pressure values over a predetermined arc of rotation of the pumping cam, between a first predetermined angle of rotation and a second predetermined angle of rotation, in which a first occluder closes and a second occlude opens and a first pumping finger pushes the fluid through the infusion line. ### Claim 5 (depends on 4) The system of claim 4, further comprising: an encoder configured to generate an encoder signal based on rotation of the pumping cam, wherein the control unit is further configured to: receive an encoder signal from an encoder configured to generate the encoder signal based on rotation of the pumping cam; and determine a respective angle of rotation of the pumping cam based on the encoder signal. ### Claim 6 (depends on 5) The system of claim 5, wherein the control unit is further configured to: measure, with the pressure sensor, the pressure of the fluid over a first portion of the pumping cycle and a second portion of the pumping cycle. ### Claim 7 (depends on 1) The system of claim 1, wherein the control unit is further configured to: determine a slope of measurement values obtained during the measuring of the pressure over the at least the portion of the pumping cycle; compare the slope with predetermined slopes corresponding to predetermined faults; identify a predetermined fault for the pumping cycle based on the comparing; and provide, for display on a display device associated with the control unit, an alert indicating the identified predetermined fault. ### Claim 8 (depends on 1) The system of claim 1, wherein the control unit is further configured to: detect a predetermined drop in pressure during the portion of the pumping cycle of the infusion pump. ### Claim 9 (depends on 1) The system of claim 1, wherein the control unit is further configured to: collect pressure data over a plurality of cycles and determining the metric based on values measured during the portion of the pumping cycle in each of the plurality of cycles. ### Claim 10 A method for detecting an over-infusion of a fluid, comprising: measuring, over at least a portion of a pumping cycle of an infusion pump, with a pressure sensor, a pressure of the fluid in the infusion line loaded into the infusion pump, the pumping cycle including application of at least one occluder and at least one pumping finger to the infusion line to move the fluid through the infusion line; determining a metric based on measuring the pressure over the at least the portion of the pumping cycle; determining that the metric corresponds to a fault threshold associated with the at least the portion of the pumping cycle corresponding to an over-infusion fault; and providing, for display on a display device associated with the infusion pump, an alert indicating the over-infusion fault. ### Claim 11 (depends on 10) The method of claim 10, further comprising: causing, responsive to determining that the metric satisfies the fault threshold, the infusion pump to terminate or reduce pumping of the fluid through the infusion line. ### Claim 12 (depends on 10) The method of claim 10, wherein measuring the pressure over the at least the portion of the pumping cycle comprises measuring a plurality of pressure values over a fill phase, and wherein the metric is determined for the fill phase. ### Claim 13 (depends on 10) The method of claim 10, wherein measuring the pressure over the at least the portion of the pumping cycle comprises measuring a plurality of pressure values over a predetermined arc of rotation of a pumping cam of the infusion pump, between a first predetermined angle of rotation and a second predetermined angle of rotation, in which a first occluder closes and a second occlude opens and a first pumping finger pushes the fluid through the infusion line. ### Claim 14 (depends on 13) The method of claim 13, further comprising: measuring, with the pressure sensor, the pressure of the fluid over a first portion of the pumping cycle and a second portion of the pumping cycle. ### Claim 15 (depends on 10) The method of claim 10, further comprising: receiving an encoder signal from an encoder configured to generate the encoder signal based on rotation of the pumping cam; and determining a respective angle of rotation of the pumping cam based on the encoder signal. ### Claim 16 (depends on 10) The method of claim 10, further comprising: determining a slope of measurement values obtained during the measuring of the pressure over the at least the portion of the pumping cycle; comparing the slope with predetermined slopes corresponding to predetermined faults; identifying a predetermined fault for the pumping cycle based on the comparing; and providing, for display on a display device associated with the infusion pump, an alert indicating the identified predetermined fault. ### Claim 17 (depends on 10) The method of claim 10, wherein measuring the pressure comprises: measuring the pressure using a pressure sensor integrated in the infusion pump. ### Claim 18 (depends on 10) The method of claim 10, further comprising: detecting a predetermined drop in pressure during the portion of the pumping cycle of the infusion pump. ### Claim 19 (depends on 10) The method of claim 10, further comprising: collecting pressure data over a plurality of cycles and determining the metric based on values measured during the portion of the pumping cycle in each of the plurality of cycles. ### Claim 20 A non-transitory computer-readable medium having instructions stored thereon that, when executed by a computing device, cause the computing device to perform a method according, comprising: measuring, over at least a portion of a pumping cycle of an infusion pump, with a pressure sensor, a pressure of the fluid in the infusion line loaded into the infusion pump, the pumping cycle including application of at least one occluder and at least one pumping finger to the infusion line to move the fluid through the infusion line; determining a metric based on measuring the pressure over the at least the portion of the pumping cycle; determining that the metric corresponds to a fault threshold associated with the at least the portion of the pumping cycle corresponding to an over-infusion fault; and providing, for display on a display device associated with the infusion pump, an alert indicating the over-infusion fault.