# US 10,865,786 B2 · Infusion pump with independently controllable valves and low power operation and methods thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,786 B2 - Document ID: US10865786B2 - Status: Granted - Kind: B2 - Application number: 15/996,216 - Filed: 2018-06-01 - Published: 2018-09-27 - Granted: 2020-12-15 - Earliest claimed: 2011-08-02 - Assignees: Baxter International Inc.; Baxter Healthcare S.A. - Applicants: Baxter International Inc.; Baxter Healthcare S.A. - Inventors: Roger L. Hungerford; Tuan Bui - Web page: https://patentgrep.com/patent/US10865786B2 ## CPC - F04B 49/065: {and making use of computers} - A61M 5/14: Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor - A61M 5/14228: {with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member} - F04B 43/082: {the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism} - F04B 49/22: by means of valves (F04B49/03 takes precedence) - A61M 5/16813: {by controlling the degree of opening of the flow line} - A61M 5/172: electrical or electronic - A61M 2205/3334: Measuring or controlling the flow rate - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - 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 infusion pump is provided, including a specially programmed microprocessor, a flow sensor for measuring flow from a source of fluid through an output tubing, a pumping section including a plurality of fingers in operational relationship to the output tubing, an outlet valve associated with the output tubing, and a first actuator configured for sequentially displacing the plurality of fingers to displace fluid through the output tubing. An inlet valve is disposed between the pumping section and the source of fluid; and a second actuator is also included. For detection, by the flow sensor, of flow above a predetermined level, the microprocessor is configured for one of: closing the outlet valve independently of the inlet valve using the first actuator; and closing the inlet valve independently of the outlet valve using the second actuator. ## Claims ### Claim 1 An infusion pump, comprising: a specially programmed microprocessor; a drip chamber in fluid communication with a source of fluid; an output tubing in fluid communication with the drip chamber; a flow sensor configured for measuring flow through the drip chamber; an inlet valve associated with the outlet tubing; and, an actuator configured for operating the inlet valve, wherein in a gravity-feed mode the microprocessor is arranged to control the actuator, using data from the flow sensor including flow measured by the flow sensor, to operate the inlet valve to establish flow to the output tubing at a desired flow rate. ### Claim 2 An infusion pump, comprising: a specially programmed microprocessor; a drip chamber connected to a source of fluid; an output tubing connected to the drip chamber; a flow sensor for measuring flow from the source of fluid through the drip chamber; an element for forcing fluid from the source of fluid; an inlet valve associated with the outlet tubing; and, an actuator for operating the inlet valve, wherein in a gravity-feed mode, the microprocessor is arranged to control the actuator, using data from the flow sensor including flow measured by the flow sensor, to operate the inlet valve to establish flow to the outlet tubing at a desired flow rate. ### Claim 3 A method for infusing a fluid using an infusion pump including a specially programmed microprocessor; a drip chamber connected to a source of fluid; an outlet tubing connected to the drip chamber; a flow sensor for measuring flow through the drip chamber; an inlet valve associated with the outlet tubing; and an actuator for operating the inlet valve, the method comprising: accepting, using the microprocessor, data from the flow sensor including flow measured by the flow sensor; and, in a gravity-feed mode, controlling, using the microprocessor and the data, the actuator to operate the inlet valve to establish flow to the output tubing at a desired flow rate. ### Claim 4 A method for infusing a fluid using an infusion pump including a specially programmed microprocessor; a drip chamber connected to a source of fluid; an outlet tubing connected to the drip chamber; a flow sensor for measuring flow from the source of fluid through the drip chamber; an element for forcing fluid from the source of fluid; an inlet valve associated with the outlet tubing; and an actuator for operating the inlet valve, the method comprising: accepting, using the microprocessor, data from the flow sensor including flow measured by the flow sensor; and, in a gravity-feed mode, controlling, the microprocessor and the data, the actuator, the flow sensor to operate the inlet valve to establish flow to the output tubing at a desired flow rate.