Systems for managing reservoir chamber pressure

• US 9,833,563 B2
• Filed: 09/26/2014
• Issued: 12/05/2017
• 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:
  US14/498,433
• Publication Number:
  US 20160089506A1
• Time in Patent Office: 1,166 Days
• Field of Search: 604131, 604151, 604118, 600578, 600573
• CPC Class Codes: A61M 2005/14264 with means for compensating influence from the environment
• CPC Class Codes: A61M 2039/205 comprising air venting means
• CPC Class Codes: A61M 2205/3341 stabilising pressure or flow to avoid excessive variation
• CPC Class Codes: A61M 2205/3358 Measuring barometric pressure, e.g. for compensation
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/14566 with a replaceable reservoir for receiving a piston rod of the pump

Abstract

Systems for managing pressure in a fluid reservoir chamber of a fluid infusion device are provided. For example, a fluid infusion device is provided. The fluid infusion device comprises a housing defining a reservoir chamber for receiving a fluid reservoir. The fluid infusion device also comprises a drive system contained within the housing for dispensing fluid from the fluid reservoir. The fluid infusion device comprises a pressure management system at least partially defined in the reservoir chamber to manage air pressure in the reservoir chamber.

Claims

1. A fluid infusion device, comprising:

a housing defining a reservoir chamber that receives a fluid reservoir and a second chamber, the reservoir chamber includes a wall adjacent to the fluid reservoir;

a drive system contained within the housing for dispensing fluid from the fluid reservoir; and

a plurality of bores defined through the wall of the reservoir chamber, each of the plurality of bores having a first end in communication with the reservoir chamber and a second end in communication with the second chamber to define an airflow path to manage air pressure in the reservoir chamber, each of the plurality of bores having a centerline that is substantially parallel to a longitudinal axis of the reservoir chamber.

2. The fluid infusion device of claim 1, wherein the pressure management system further comprises a membrane coupled to the wall.

3. The fluid infusion device of claim 2, wherein the membrane is a hydrophobic membrane.

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

5. The fluid infusion device of claim 1, further comprising a connector body coupled to the housing and the fluid reservoir to define a fluid path from the housing, the connector body including one or more vents to vent air from the reservoir chamber.

6. A fluid infusion device, comprising:

a housing defining a reservoir chamber having a wall and a second chamber;

a fluid reservoir receivable within the reservoir chamber;

a drive system contained within the housing for dispensing fluid from the fluid reservoir; and

a pressure management system at least partially defined in the reservoir chamber to manage air pressure in the reservoir chamber, the pressure management system including a valve coupled to the wall of the reservoir chamber that is movable between a first position and a second position based on a pressure within the reservoir chamber, and in the second position, the valve defines an airflow path between the reservoir chamber and the second chamber to vent air from the reservoir chamber to the second chamber.

7. The fluid infusion device of claim 6, wherein the wall defines at least one bore, and the valve includes a valve seat that defines at least one bore, with the valve coupled to the wall such that the at least one bore of the valve seat is coaxial with the at least one bore of the wall to create the airflow path for managing air pressure in the reservoir chamber.

8. The fluid infusion device of claim 7, wherein the valve includes a valve stem coupled to the wall and a valve seal, and the valve seal covers the airflow path.

9. The fluid infusion device of claim 7, wherein the valve includes a valve stem that is movable relative to the valve seat based on an insertion of the fluid reservoir into the reservoir chamber.

10. The fluid infusion device of claim 9, wherein the valve stem is movable from the first position, in which the airflow path is closed, to the second position, in which the airflow path is opened, based on contact between the fluid reservoir and the valve stem during insertion of the fluid reservoir into the reservoir chamber.

11. The fluid infusion device of claim 10, wherein the pressure management system further comprises a biasing member that biases the valve stem in the first position.

12. An insulin infusion device, comprising:

a housing defining a reservoir chamber having a wall, the wall including an expandable portion that has a thickness that is less than a second thickness of the wall;

a fluid reservoir received within the reservoir chamber;

a connector body coupled to the housing and the fluid reservoir to define a fluid path from the housing, the connector body including one or more vents to vent air from the reservoir chamber; and

a drive system contained within the housing and coupled to the fluid reservoir to dispense fluid from the fluid reservoir,

wherein the expandable portion of the wall of the reservoir chamber moves from a first position to a second position to increase a volume of the reservoir chamber to manage air pressure in the reservoir chamber.