Pump assembly and method for infusion device

• US 7,699,833 B2
• Filed: 08/23/2005
• Issued: 04/20/2010
• Est. Priority Date: 05/06/2005
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Inventors: Moberg, Sheldon B., Hanson, Ian B., Cheney, Paul S. II
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): BERDICHEVSKY, AARTI
• Application Number:
  US11/211,150
• Publication Number:
  US 20080009824A1
• Time in Patent Office: 1,701 Days
• Field of Search: 604/890.1, 604/892.1, 604/131, 222/160, 222/271, 222/333, 222/383.2, 222/410
• US Class Current: 604/890.1
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 2005/14268 with a reusable and a disposable component
• CPC Class Codes: A61M 2005/14573 with a replaceable reservoir for quick connection/disconnection with a driving system
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 2207/10 Device therefor
• CPC Class Codes: A61M 25/02 Holding devices, e.g. on the body
• CPC Class Codes: A61M 5/1413 Modular systems comprising interconnecting elements
• CPC Class Codes: A61M 5/14236 Screw, impeller or centrifugal type pumps
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: A61M 5/1723 using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00

Abstract

A delivery device includes a durable housing portion and a separable disposable portion that selectively engage and disengage from each other. The disposable housing portion contains a reservoir and secures to the patient and may be disposed of after it has been in use for a prescribed period. A disposable pump assembly selectively connects to the reservoir. The disposable pump assembly includes a pump rotor, a septum and a needle for conveying infusion media from the reservoir to the patient.

Claims

1. A pump assembly system for coupling to a reservoir container that contains a flowable medium, the pump assembly system comprising:

a pump housing portion that contains a pump chamber, an outlet end on one side of the pump chamber and a receptacle on a second side of the pump chamber, the receptacle having a size and shape for receiving one end of a reservoir, the receptacle being in fluid flow communication with the pump chamber;

a rotary pump blade supported for rotation within the pump chamber;

a flow communicator located within the receptacle for providing a flow path for communication of a flowable medium from a reservoir to the pump chamber when one end of the reservoir is received within the receptacle; and

a septum structure on the outlet end of the pump housing portion for allowing a hollow needle to extend through the septum structure to provide a fluid flow path out from the outlet end of the pump housing portion.

2. A pump assembly system as recited in claim 1, further comprising a drive axel supporting the rotary pump blade for rotation within the pump chamber, the drive axel extending through a wall of the pump housing portion and having an external end located external to the pump housing portion for engaging a drive device.

3. A pump assembly system according to claim 2, further comprising a gear coupled to the external end of the drive axel for engaging the drive device.

4. A pump assembly system according to claim 1, wherein the septum structure comprises a pair of septa arranged across from each other on opposing sides of the pump housing portion for allowing a hollow needle to pass through both septa, and wherein the hollow needle has a side opening that provides a fluid flow path for the fluid within the outlet chamber end of the housing to a location outside of the outlet chamber when hollow needle is passed through the septa.

5. A pump assembly system according to claim 4, wherein the hollow needle further comprises a head with a surface on which a force may be applied to move the hollow needle through the septa.

6. A pump assembly system as recited in claim 1, wherein the reservoir to which the pump assembly couples is provided with a septum structure and wherein the flow communicator comprises a needle located within the receptacle and having a sharp end directed toward an open end of the receptacle and wherein the open end of the receptacle is of a size and shape for receiving the one end of the reservoir such that the sharp end of the needle pierces the septum structure of the reservoir during an action of inserting the reservoir into the open end of the receptacle.

7. A pump assembly system as recited in claim 1, further comprising a drive axel for rotably supporting the rotary pump blade, the drive axel is configured to be operatively coupled to a drive device for rotation of the drive axel by the drive device.

8. A pump assembly system according to claim 1, further comprising an outlet chamber in fluid flow communication with the pump chamber, for receiving fluid from the pump chamber.

9. A pump assembly system according to claim 1, wherein the flow communicator comprises a needle arranged within the receptacle to extend into a reservoir when the one end of the reservoir is received within the receptacle;

wherein the pump assembly couples to the reservoir by manually pushing the receptacle of the pump housing over one end of the reservoir until the needle partially extends into the reservoir for fluid flow communication with the interior of the reservoir.

10. A pump assembly system according to claim 1, wherein the further comprising an outlet chamber in fluid flow communication with the pump chamber and having an opening for conveying infusion media out of the pump housing portion.

11. A pump assembly system as recited in claim 1, wherein the pump housing portion comprises a single unitary body having the receptacle located on one end of the single unitary body and the outlet end and septum structure located on an opposite end of the single unitary body relative to the one end at which the receptacle is located.

12. A pump assembly system as recited in claim 1, wherein the outlet end of the pump housing contains an outlet chamber and wherein the septum structure is arranged relative to the outlet chamber to allow a hollow needle to extend into the outlet chamber of the pump housing when the hollow needle is extended through the septum structure.

13. A pump assembly system as recited in claim 1, wherein the outlet end of the pump housing contains an outlet chamber and wherein the septum structure is arranged relative to the outlet chamber to allow a hollow needle to extend into, through and out of the outlet chamber of the pump housing when the hollow needle is extended through the septum structure.

14. A pump assembly system as recited in claim 1, wherein the outlet end of the pump housing contains an outlet chamber, the pump assembly system further comprising a hollow needle arranged to extend into the outlet chamber of the pump housing when the hollow needle is extended through the septum structure.

15. A pump assembly system as recited in claim 1, wherein the outlet end of the pump housing contains an outlet chamber, the pump assembly system further comprising a hollow needle arranged to extend into, through and out of the outlet chamber of the pump housing when the hollow needle is extended through the septum structure.

16. A pump assembly system as recited in claim 1, further comprising:

a first housing portion adapted to be secured to a user;

a second housing portion configured to be selectively engaged with and disengaged from the first housing portion;

a reservoir for containing infusion media supported on the first housing portion, wherein the reservoir comprises a container and a septum at one end of the container configured to be received by the receptacle;

a drive device for rotatably driving the rotary pump blade within the pump chamber to impart a fluid flow force directed to convey fluid from the reservoir, throgh the pump chamber, when the septum of the reservoir is received in the receptacle of the pump housing portion;

electrical control circuitry contained in the second housing portion, wherein the electrical control circuitry controls the delivery of infusion media from the reservoir to the user.

17. A pump assembly system according to claim 16, further comprising a drive axel supporting the rotary pump blade for rotation within the pump chamber, the drive axel extending through a wall of the pump housing portion and having an external end located external to the pump housing portion for engaging the drive device.

18. A pump assembly system according to claim 17, further comprising a gear coupled to the external end of the drive axel for engaging the drive device.

19. A pump assembly system according to claim 16, wherein the septum structure comprises a pair of septa arranged across from each other on opposing sides of the pump housing portion for allowing a hollow needle to pass through both septa, and wherein the hollow needle has a side opening that provides a fluid flow path for the fluid within the outlet chamber end of the housing to a location outside of the outlet chamber when hollow needle is passed through the septa.

20. A pump assembly system according to claim 19, wherein the hollow needle further comprises a head with a surface on which a force may be applied to move the hollow needle through the septa.

21. A pump assembly system according to claim 16, wherein the rotary pump blade is supported on a drive axel and wherein the drive device comprises a motor and a drive gear coupled to the drive axel for rotation of the drive axel by the motor.

22. A pump assembly system according to claim 16, wherein the pump assembly further comprises a hollow needle having a sharp end located within the receptacle and facing toward an open end of the receptacle for piercing the septum of a reservoir when a reservoir septum is received within the receptacle, the hollow needle provided in fluid flow communication with the pump chamber.

23. A pump assembly system according to claim 16, further comprising an outlet chamber in fluid flow communication with the pump chamber, for receiving fluid from the pump chamber.

24. A pump assembly system according to claim 16, wherein the pump assembly further comprises a hollow needle having a sharp end located within the receptacle, the hollow needle provided in fluid flow communication with the pump chamber;

wherein the pump assembly couples to the reservoir by manually pushing the receptacle end of the pump housing over the septum of the reservoir until the hollow needle pierces the septum on the reservoir and partially extends into the reservoir for fluid flow communication between the interior of the reservoir.

25. A pump assembly system according to claim 16, further comprising an outlet chamber in fluid flow communication with the pump chamber and having an opening for conveying infusion media out of the pump assembly.

26. A method for coupling a pump assembly to a reservoir container that contains a flowable infusion medium, the method comprising:

providing a pump housing portion that contains a pump chamber, an outlet end on one side of the pump chamber and a receptacle on a second side of the pump chamber, the receptacle having a size and shape for receiving one end of a reservoir;

supporting a rotary pump blade for rotation within the pump chamber;

providing the receptacle in fluid flow communication with the pump chamber;

providing a flow path for communication of a flowable medium from the reservoir, through the pump chamber, when one end of the reservoir is received in the receptacle; and

providing a septum structure on the outlet end of the pump housing for allowing a hollow needle to extend through the septum structure to provide a fluid flow path out from the outlet end of the pump housing portion.

27. A method according to claim 26, further comprising arranging an outlet chamber in fluid flow communication with the pump chamber for receiving fluid from the pump chamber.

28. A method according to claim 26, wherein providing a receptacle comprises providing a receptacle having a hollow needle with a sharp end for coupling to the reservoir by manually pushing the receptacle of the pump housing over a septum of the reservoir until the hollow needle pierces the septum on the reservoir and partially extends into the reservoir for fluid flow communication between the interior of the reservoir and the pump chamber.

29. A method according to claim 26, wherein providing a septum structure comprises providing a pair of septa arranged across from each other on opposing sides of the pump housing portion for allowing a hollow needle to pass through both septa, and providing a hollow needle with a side opening that provides a fluid flow path for the fluid within the outlet chamber end of the housing to a location outside of the outlet chamber when hollow needle is passed through the septa.

30. A method according to claim 26, further comprising:

providing a first housing portion adapted to be secured to a user;

supporting a reservoir for containing infusion media on the first housing portion;

coupling the pump housing portion to the reservoir by receiving said one end of the reservoir in the receptacle.

31. A method according to claim 30, further comprising:

providing a second housing portion configured to selectively engage and disengage with the first housing portion;

supporting a drive device on the second housing portion;

coupling the drive device to the rotary pump blade for rotatably driving the rotary pump blade within the pump chamber to impart a fluid flow force directed to convey fluid through the flow path, upon the first and second housing portions being engaged.

32. A method according to claim 26, further comprising coupling the rotary pump blade with a drive device for rotatably driving the rotary pump blade within the pump chamber to impart a fluid flow force directed to convey fluid through the flow path.

33. A method according to claim 32, wherein supporting a rotary pump blade comprises supporting the rotary pump blade on a drive axel and wherein the drive device comprises a motor coupled to the drive axel for rotation of the drive axel by the motor.

34. A method according to claim 32, wherein supporting a rotary pump blade comprises coupling a drive axel to the rotary pump blade, supporting the rotary pump blade on the drive axel for rotation within the pump chamber, extending the drive axel through a wall of the pump housing portion and engaging an external end of the drive axel located external to the pump housing portion with the drive device.