Pump cassettes with slider and infusion pump systems

• US 10,363,360 B2
• Filed: 12/01/2014
• Issued: 07/30/2019
• Est. Priority Date: 12/01/2014
• Status: Active Grant

• Current Assignee: Carefusion 2200 Corporation (Becton, Dickinson & Co)
• Original Assignee: Carefusion 2200 Corporation (Becton, Dickinson & Co)
• Inventors: Toro, Daniel, Vasko, Robert, Dodge, Santiago, Abal, Daniel, Magers, Corey Michael, Browka, Edward, Fentress, James, McCall, Jr., Charles E.
• Primary Examiner(s): Hayman, Imani N
• Assistant Examiner(s): Legette, Tiffany
• Application Number:
  US14/557,446
• Publication Number:
  US 20160151560A1
• Time in Patent Office: 1,702 Days
• CPC Class Codes: A61M 2005/14208 with a programmable infusion control system, characterised by the infusion program
• CPC Class Codes: A61M 2005/14288 Infusion or injection simulation simulation of surgery in general A61B34/10; training for or simulation of use of injection or infusion devices G09B23/285
• CPC Class Codes: A61M 2039/226 Spindles or actuating means
• CPC Class Codes: A61M 5/1413 Modular systems comprising interconnecting elements
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/145 using pressurised reservoirs, e.g. pressurised by means of pistons
• CPC Class Codes: A61M 5/16813 by controlling the degree of opening of the flow line

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, and two opposing longitudinal edge sections. The rigid body may include a controllable fluid pathway defined in part by the compliant membrane and extending from an inlet port to an outlet port. The pump cassette may include a slider coupled to the two opposing longitudinal edge sections and longitudinally articulable with respect to the rigid body.

Claims

1. A pump cassette comprising:

a rigid body comprising a frame portion, a base portion, a compliant membrane disposed substantially therebetween, and two opposing longitudinal edge sections, wherein the rigid body comprises a controllable fluid pathway defined in part by the compliant membrane and extending from an inlet port to an outlet port; and

a slider coupled to the two opposing longitudinal edge sections and longitudinally articulable in a first direction along the two opposing longitudinal edge sections with respect to the rigid body, the slider including engagement protrusions that extend outwardly from the slider away from the rigid body in a second direction that is substantially perpendicular to the first direction, the engagement protrusions configured to interface with corresponding slots of a cassette recess of an infusion pump to releasably lock the pump cassette in the cassette recess upon articulation of the slider, wherein the engagement protrusions include a first pair of engagement protrusions that are spaced apart by a first distance and a second pair of engagement protrusions that are spaced apart by a second distance that is different from the first distance.

2. The pump cassette of claim 1, wherein the first pair of engagement protrusions is proximate to a top edge section of the slider and the second pair of engagement protrusions is proximate to a bottom edge section of the slider.

3. The pump cassette of claim 1, wherein a first engagement protrusion disposed on the slider is longitudinally aligned with a second engagement protrusion disposed on the slider, with the first engagement protrusion being disposed on a same edge of the slider as the second engagement protrusion.

4. The pump cassette of claim 1, where the rigid body comprises an arcuate edge section that has a curvature different from at least one other arcuate edge section or corner edge section of the rigid body.

5. The pump cassette of claim 1, wherein the frame portion comprises one of an interface positioning port or an interface positioning protrusion, and wherein the rigid body comprises at least one arcuate edge section that comprises an edge section including a convex curve with respect to the one of the interface positioning port or the interface positioning protrusion.

6. The pump cassette of claim 1, wherein the rigid body further comprises a pump drive mechanism operably accessible from an exterior of the pump cassette, and wherein the pump drive mechanism is operably coupled to a piston disposed within the rigid body such that movement of the piston varies a volume of a pump chamber defined within the controllable fluid pathway.

7. The pump cassette of claim 1, wherein the rigid body further comprises a pump structure operably accessible from an exterior of the pump cassette, and wherein the pump structure comprises a piston arranged substantially orthogonal to a general plane of an interface-facing surface of the rigid body.

8. The pump cassette of claim 1, wherein the rigid body comprises one or more slider stopper portions configured to restrict a distance for which the slider is longitudinally articulable.

9. The pump cassette of claim 1, wherein the first and second pairs of engagement protrusions are pairs of laterally positioned engagement protrusions disposed proximate to a top or bottom edge section of the rigid body.

10. The pump cassette of claim 9, wherein a first of the first pair of engagement protrusions extends from an edge adjacent to the top edge section of the rigid body in a direction opposite to a second of the first pair of engagement protrusions.

11. The pump cassette of claim 9, wherein a first of the first pair of engagement protrusions extends from an edge adjacent to the top edge section, and wherein the first of the first pair of engagement protrusions extends in a direction parallel to a second of the first pair of engagement protrusions.

12. The pump cassette of claim 1, wherein the frame portion and the compliant membrane are transparent or translucent.

13. The pump cassette of claim 12, wherein the frame portion comprises a lens area configured for magnification of the controllable fluid pathway.

14. An infusion pump system comprising:

a processing unit; and

a cassette recess comprising;

one or more pumping feature interfaces disposed proximate to a back surface of the cassette recess and operably coupled to the processing unit, and

a plurality of cassette engagement slots,

wherein the cassette recess is adapted to receive a pump cassette comprising;

a rigid body comprising a frame portion, a base portion, a compliant membrane disposed substantially therebetween, and two opposing longitudinal edge sections, wherein the rigid body comprises a controllable fluid pathway defined in part by the compliant membrane and extending from an inlet port to an outlet port, and

a slider coupled to the two opposing longitudinal edge sections and longitudinally articulable in a first direction along two opposing longitudinal edge sections with respect to the rigid body, the slider comprising a plurality of engagement protrusions that extend outwardly from the slider away from the rigid body in a second direction that is substantially perpendicular to the first direction, the plurality of engagement protrusions configured to engage with the plurality of cassette engagement slots in the cassette recess to releasably lock the pump cassette in the cassette recess upon articulation of the slider, wherein the plurality of engagement protrusions include a first pair of engagement protrusions that are spaced apart by a first distance and a second pair of engagement protrusions that are spaced apart by a second distance that is different from the first distance,

wherein the pump cassette is configured to securely latch with the cassette recess when the plurality of engagement protrusions are positioned in the plurality of cassette engagement slots and the slider is longitudinally articulated in the first direction.

15. The infusion pump system of claim 14, wherein the pump cassette is configured to unlatch with the cassette recess when pump cassette is securely latched with the cassette recess and the slider is longitudinally articulated in a third direction that is opposite the first direction.

16. The infusion pump system of claim 14, wherein the plurality of cassette engagement slots comprise a plurality of L-shaped locking channels.

17. The infusion pump system of claim 14, wherein the plurality of cassette engagement slots comprise a plurality ramped opening portions.

18. The infusion pump system of claim 14, wherein the cassette recess further comprises at least one of an inlet recess or an outlet recess.

19. The infusion pump system of claim 14, wherein the one or more pumping feature interfaces comprises a valve actuator and a pump actuator.

20. The infusion pump system of claim 14, wherein the one or more pumping feature interfaces further comprises a pressure sensing probe and a positioning protrusion.

21. A method of coupling a pump cassette to within a cassette recess of an infusion pump system, the method comprising:

aligning a plurality of engagement protrusions of a slider of the pump cassette with a plurality of cassette engagement slots of the cassette recess, wherein the plurality of cassette engagement slots are disposed along a perimeter of the cassette recess, wherein the engagement protrusions include a first pair of engagement protrusions that are spaced apart by a first distance and a second pair of engagement protrusions that are spaced apart by a second distance that is different from the first distance;

engaging the plurality of engagement protrusions of the pump cassette with plurality of cassette engagement slots of the cassette recess such that the pump cassette is substantially seated in the cassette recess; and

longitudinally articulating the slider of the pump cassette in a first direction along two opposing longitudinal edges of a rigid body of the pump cassette such that the pump cassette is latched to the cassette recess, wherein the plurality of engagement protrusions extend outwardly from the slider away from the rigid body of the pump cassette in a second direction that is substantially perpendicular to the first direction, wherein the rigid body comprises a frame portion, a base portion, and a compliant membrane disposed substantially therebetween, wherein the rigid body comprises a controllable fluid pathway defined in part by the compliant membrane and extending from an inlet port to an outlet port.

22. The method of claim 21, wherein the first and second pairs of engagement protrusions extend from opposing edges of the slider of the pump cassette.