# US 10,245,373 B2 · Pump cassettes with positioning feature and infusion pump systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,245,373 B2 - Document ID: US10245373B2 - Status: Granted - Kind: B2 - Application number: 14/557,447 - Filed: 2014-12-01 - Published: 2016-06-02 - Granted: 2019-04-02 - Earliest claimed: 2014-12-01 - Assignees: CareFusion 2200, Inc. - Applicants: CareFusion 2200, Inc. - Inventors: Daniel Toro; Corey Michael Magers; Santiago Dodge; Robert Vasko - Web page: https://patentgrep.com/patent/US10245373B2 ## CPC - A61M 5/142: Pressure infusion, e.g. using pumps - A61M 2205/121: interface between cassette and base - A61M 2205/128: with incorporated valves - A61M 2205/3327: Measuring - A61M 2205/505: Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches - 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 Pump cassettes, infusion systems, and methods are described. An example pump cassette may include a rigid body comprising a frame portion, a base portion, a compliant membrane disposed substantially therebetween, two opposing edge sections, and an interface-facing surface. The rigid body may include a positioning feature arranged substantially orthogonal to a general plane of the interface-facing surface. The pump cassette may include a slider coupled to the two opposing edge sections and longitudinally articulable with respect to the rigid body. ## Claims ### Claim 1 A pump cassette comprising: a rigid body comprising a frame portion, a base portion, a compliant membrane disposed substantially therebetween, two opposing edge sections, and an interface-facing surface; a controllable fluid pathway defined at least in part by the base portion and the compliant membrane; a first positioning feature on the frame portion and arranged substantially orthogonal to a general plane of the interface-facing surface, the first positioning feature configured to mechanically interact with a first corresponding positioning feature on a surface of a cassette recess of an infusion pump for positioning of the pump cassette within the cassette recess; a second positioning feature on the frame portion, laterally separated from the first positioning feature, arranged substantially orthogonal to the general plane of the interface-facing surface, and configured to mechanically interact with a second corresponding positioning feature on the surface of the cassette recess of the infusion pump for positioning of the pump cassette within the cassette recess, wherein the second positioning feature comprises a protrusion on the frame portion within which a portion of the controllable fluid pathway is disposed; and a slider coupled to the two opposing edge sections and longitudinally articulable with respect to the rigid body. ### Claim 2 (depends on 1) The pump cassette of claim 1, wherein the first positioning feature comprises a positioning port defining a recess into the interface-facing surface, the recess configured to receive the first corresponding positioning feature on the surface of the cassette recess of the infusion pump. ### Claim 3 (depends on 1) The pump cassette of claim 1, wherein the first positioning feature comprises a first positioning protrusion extending from the interface-facing surface, the first positioning protrusion configured to be received by the first corresponding positioning feature on the surface of the cassette recess of the infusion pump. ### Claim 4 (depends on 3) The pump cassette of claim 3, the controllable fluid pathway extending from an inlet port to an outlet port, and wherein the second positioning feature comprises a fluid pathway extension member of the controllable fluid pathway. ### Claim 5 (depends on 3) The pump cassette of claim 3, the controllable fluid pathway extending from an inlet port to an outlet port, and wherein the pump cassette further comprises a pump structure configured to urge fluid through the controllable fluid pathway. ### Claim 6 (depends on 5) The pump cassette of claim 5, wherein the pump structure comprises an external support wall portion extending from the interface-facing surface. ### Claim 7 (depends on 1) The pump cassette of claim 1, wherein the second positioning feature comprises a fluid pathway extension member extending from the interface-facing surface and configured to be received in a sensor slot in the cassette recess to provide monitoring access to the portion of the controllable fluid pathway by an ultrasonic air-in-line sensor in the sensor slot. ### Claim 8 A pump cassette comprising: a rigid body comprising a compliant membrane, two opposing edge sections, and an interface-facing surface, wherein the rigid body comprises a controllable fluid pathway including a pump chamber, the controllable fluid pathway defined in part by the compliant membrane and extending from an inlet port to an outlet port, wherein the rigid body includes a positioning feature on the frame portion and arranged substantially orthogonal to a general plane of the interface-facing surface, the positioning feature configured to mechanically interact with a first corresponding positioning feature on a surface of a cassette recess of an infusion pump for positioning of the pump cassette within the cassette recess; a pump assembly including a pump drive mechanism operably accessible from the interface-facing surface, wherein the pump drive mechanism is longitudinally articulable with respect to the rigid body; and a slider coupled to the two opposing edge sections and longitudinally articulable with respect to the rigid body. ### Claim 9 (depends on 8) The pump cassette of claim 8, wherein the pump assembly further comprises a piston disposed within the rigid body and the pump drive mechanism is operably coupled to the piston. ### Claim 10 (depends on 9) The pump cassette of claim 9, wherein the piston is arranged in a position above an opening of the pump chamber such that a piston head can vary a volume of the pump chamber when the pump drive mechanism is longitudinally articulated. ### Claim 11 (depends on 10) The pump cassette of claim 10, wherein the position above the pump chamber is a position that is proximal to the inlet port and distal from the outlet port. ### Claim 12 (depends on 9) The pump cassette of claim 9, wherein the piston is arranged in a position below an opening of the pump chamber such that a piston head can vary a volume of the pump chamber when the pump drive mechanism is longitudinally articulated. ### Claim 13 (depends on 12) The pump cassette of claim 12, wherein the position below the pump chamber is a position that is proximal to the outlet port and distal from the inlet port. ### Claim 14 (depends on 9) The pump cassette of claim 9, wherein the piston is arranged in a rail for guiding the piston during a piston stroke. ### Claim 15 (depends on 8) The pump cassette of claim 8, wherein the slider comprises a lens area configured to magnify the controllable fluid pathway. ### Claim 16 A pump cassette comprising: a rigid body comprising a frame portion, a base portion, a compliant membrane disposed substantially therebetween, two opposing edge sections, and an interface-facing surface; a controllable fluid pathway defined at least in part by the base portion and the compliant membrane; a first positioning feature on the frame portion and arranged substantially orthogonal to a general plane of the interface-facing surface, the first positioning feature configured to mechanically interact with a first corresponding positioning feature on a surface of a cassette recess of an infusion pump for positioning of the pump cassette within the cassette recess; and a pump assembly including a pump drive mechanism operably accessible from the interface-facing surface, wherein the pump drive mechanism is longitudinally articulable with respect to the rigid body. ### Claim 17 (depends on 16) The pump cassette of claim 16, further comprising a second positioning feature on the frame portion, laterally separated from the first positioning feature, arranged substantially orthogonal to the general plane of the interface-facing surface, and configured to mechanically interact with a second corresponding positioning feature on the surface of the cassette recess of the infusion pump for positioning of the pump cassette within the cassette recess, wherein the second positioning feature comprises a protrusion on the frame portion within which a portion of the controllable fluid pathway is disposed. ### Claim 18 (depends on 17) The pump cassette of claim 17, wherein the second positioning feature comprises an air-in-line extension on the frame portion, and wherein the pump drive mechanism is configured to receive a pump actuator from the cassette recess of the infusion pump to drive a piston in the pump cassette.