Systems for managing reservoir chamber pressure

• US 10,279,128 B2
• Filed: 11/13/2017
• Issued: 05/07/2019
• Est. Priority Date: 09/26/2014
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Inventors: Alderete, Jr., Juan M., Weaver, Andrew E., Yavorsky, Matthew William, Grover, Benjamin A., Vazquez, Pablo
• Primary Examiner(s): Mendez, Manuel A
• Application Number:
  US15/811,230
• Publication Number:
  US 20180064888A1
• Time in Patent Office: 540 Days
• Field of Search: 604131, 604151, 600578, 600573
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/385 using hydrophobic filters
• CPC Class Codes: A61M 5/482 Varying injection pressure, e.g. by varying speed of injection
• CPC Class Codes: A61M 5/484 Regulating injection pressure

Abstract

Systems for managing pressure in a fluid reservoir chamber of a fluid infusion device are provided. For example, a fluid infusion device comprises a housing having a reservoir chamber that receives a fluid reservoir and a pump chamber. The fluid infusion device also includes a drive system contained within the pump chamber, and the drive system includes a slide that is movable relative to the fluid reservoir. The slide includes a proximal slide end that cooperates with a portion of the fluid reservoir to dispense fluid, and the proximal slide end has a projection. The fluid infusion device includes a pressure management system defined in the projection of the slide. The pressure management system includes at least one bore defined through the projection. The at least one bore is spaced a distance apart from a perimeter of the projection to vent air from the reservoir chamber into the pump chamber.

Claims

1. A fluid infusion device, comprising:

a housing having a reservoir chamber that receives a fluid reservoir and a pump chamber;

a drive system contained within the pump chamber of the housing, the drive system including a slide that is movable relative to the fluid reservoir, the slide including a proximal slide end that cooperates with a portion of the fluid reservoir to dispense fluid from the fluid reservoir, the proximal slide end having a projection;

a seal disposed between the reservoir chamber and the pump chamber that defines an opening and the slide is movable relative to the seal through the opening; and

a pressure management system defined in the projection of the slide, the pressure management system including at least one bore defined through the projection, the at least one bore spaced a distance apart from a perimeter of the projection to vent air from the reservoir chamber into the pump chamber.

2. The fluid infusion device of claim 1, wherein the at least one bore comprises three bores defined through an uppermost surface of the projection of the slide, each of the three bores spaced a distance apart from the perimeter of the projection and spaced apart from each other.

3. The fluid infusion device of claim 1, wherein the pressure management system further comprises a membrane coupled to the proximal slide end so as to substantially cover the at least one bore.

4. The fluid infusion device of claim 3, wherein the membrane is a hydrophobic membrane.

5. The fluid infusion device of claim 3, wherein the projection of the slide includes an annular counterbore defined in a proximalmost surface of the projection.

6. The fluid infusion device of claim 5, wherein the at least one bore is defined through a surface of the annular counterbore.

7. The fluid infusion device of claim 6, wherein the membrane is coupled to the surface of the annular counterbore so as to be planar with the proximalmost surface of the projection.

8. The fluid infusion device of claim 1, wherein the fluid infusion device is an insulin infusion device.

9. A fluid infusion device, comprising:

a housing having a reservoir chamber that receives a fluid reservoir and a pump chamber;

a drive system contained within the pump chamber of the housing, the drive system including a slide that is movable relative to the fluid reservoir, the slide including a proximal slide end that cooperates with a portion of the fluid reservoir to dispense fluid from the fluid reservoir, the proximal slide end having a projection with a counterbore;

a seal disposed between the reservoir chamber and the pump chamber that defines an opening and the slide is movable relative to the seal through the opening; and

a pressure management system defined in the counterbore of the projection of the slide, the pressure management system including at least one bore defined through the counterbore, the at least one bore spaced a distance apart from a perimeter of the counterbore to vent air from the reservoir chamber into the pump chamber.

10. The fluid infusion device of claim 9, wherein the at least one bore comprises a plurality of bores defined through the counterbore of the projection, and each of the plurality of bores is spaced a distance apart from the perimeter of the counterbore.

11. The fluid infusion device of claim 9, wherein the pressure management system further comprises a membrane coupled to the proximal slide end so as to substantially cover the at least one bore.

12. The fluid infusion device of claim 11, wherein the membrane is a hydrophobic membrane.

13. The fluid infusion device of claim 11, wherein the counterbore is defined through a proximalmost surface of the projection, and the membrane is coupled to the counterbore so as to be planar with the proximalmost surface of the projection.

14. The fluid infusion device of claim 9, wherein the at least one bore is defined through a surface of the counterbore and the pressure management system further comprises a membrane received within the counterbore and coupled to the surface of the counterbore so as to substantially cover the at least one bore.

15. The fluid infusion device of claim 9, wherein the fluid infusion device is an insulin infusion device.

16. A fluid infusion device, comprising:

a housing having a reservoir chamber that receives a fluid reservoir and a pump chamber;

a drive system contained within the pump chamber of the housing, the drive system including a slide that is movable relative to the fluid reservoir, the slide including a proximal slide end that cooperates with a portion of the fluid reservoir to dispense fluid from the fluid reservoir, the proximal slide end having a projection with a counterbore;

a seal disposed between the reservoir chamber and the pump chamber that defines an opening and the slide is movable relative to the seal through the opening; and

a pressure management system defined in the projection of the slide, the pressure management system including at least one bore defined through a surface of the counterbore and a membrane, the at least one bore spaced a distance apart from a perimeter of the counterbore to vent air from the reservoir chamber into the pump chamber and the membrane is coupled to the surface of the counterbore to substantially cover the at least one bore.

17. The fluid infusion device of claim 16, wherein the membrane is a hydrophobic membrane.

18. The fluid infusion device of claim 16, wherein the counterbore is defined through a proximalmost surface of the projection, and the membrane is coupled to the counterbore so as to be planar with the proximalmost surface of the projection.

19. The fluid infusion device of claim 16, wherein the at least one bore comprises a plurality of bores defined through the counterbore of the projection, and each of the plurality of bores is spaced a distance apart from the perimeter of the counterbore.