Systems and methods allowing for reservoir air bubble management

• US 7,959,715 B2
• Filed: 04/29/2008
• Issued: 06/14/2011
• Est. Priority Date: 04/30/2007
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Inventors: Lee, Mike, Miller, Thomas, Shen, Benjamin X., Hezzell, David, Kavazov, Julian D., Bikovsky, Rafael, Luan, Truong Gia, Ibranyan, Arsen, Griffin, Christopher G.
• Primary Examiner(s): Greene; Jason M
• Application Number:
  US12/111,815
• Publication Number:
  US 20080264261A1
• Time in Patent Office: 1,141 Days
• Field of Search: 95/45, 95/46, 95/47, 95/54, 952/66, 96/4, 96/6, 96/14, 961/93, 962/19, 553/851, 553/854, 210/640, 604/6.09, 604/190, 604/191, 600/578
• US Class Current: 96/6
• CPC Class Codes: A61J 1/201 having one piercing end
• CPC Class Codes: A61J 1/2075 for external venting
• CPC Class Codes: A61J 1/2096 Combination of a vial and a syringe for transferring or mixing their contents
• CPC Class Codes: A61M 2005/14268 with a reusable and a disposable component
• CPC Class Codes: A61M 2005/341 angularly adjustable or angled away from the axis of the injector
• CPC Class Codes: A61M 2209/045 for filling, e.g. for filling reservoirs
• CPC Class Codes: A61M 5/1413 Modular systems comprising interconnecting elements
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/165 Filtering accessories, e.g. blood filters, filters for infusion liquids A61M1/14 , A61M1/34, A61M1/3627, A61M1/3679, A61M1/3687 take precedence; needle sets with incorporated air inlet filters A61M5/162
• CPC Class Codes: A61M 5/36 with means for eliminating or preventing injection or infusion of air into body dialysis systems, blood oxygenators A61M1/14; haemofiltration equipment A61M1/34; automatic tube cut-off A61M39/281
• CPC Class Codes: A61M 5/38 using hydrophilic or hydrophobic filters
• CPC Class Codes: Y10T 29/494 Fluidic or fluid actuated device making

Abstract

Various embodiments of the present invention are directed to limiting a presence of air bubbles in fluidic media in a reservoir. Air passages may allow air to escape from fluidic media in a reservoir. Membranes may allow for trapping air bubbles in fluidic media before fluidic media enters a reservoir. A membrane may allow air to flow from a first reservoir containing fluidic media to a second reservoir while plunger heads within each of the reservoirs are moved within the reservoirs. An inner reservoir with a membrane may be moveable within an outer reservoir to allow air to move from the outer reservoir to the inner reservoir. An inner reservoir containing pressurized gas may allow fluidic media to be transferred to an outer reservoir.

Claims

1. A system for managing air bubbles, the system comprising:

a reservoir having a wall defining an interior volume for containing fluidic media, the reservoir having a port for expelling fluidic media from the interior volume of the reservoir, the wall of the reservoir defining one or more air passages that extend out of the interior volume of the reservoir through the wall of the reservoir;

a plunger head moveable within the reservoir, the plunger head arranged such that the interior volume of the reservoir is on one side of the plunger head and a chamber of the reservoir is on an opposite side of the plunger head from the interior volume of the reservoir, the plunger head in contact with fluidic media when fluidic media is in the interior volume of the reservoir; and

one or more filters, each of the one or more filters located in a respective air passage of the one or more air passages, each of the one or more filters configured to allow air in the interior volume of the reservoir to pass through the filter and to exit the reservoir through the respective air passage of the one or more air passages as the plunger head moves within the reservoir to expel fluidic media from the interior volume of the reservoir out the port of the reservoir.

2. The system of claim 1, wherein the one or more air passages extend from the interior volume of the reservoir to an outer surface of the reservoir.

3. The system of claim 2, wherein each of the one or more filters are located at an end of the respective air passage of the one or more air passages.

4. The system of claim 3,

wherein each of the one or more filters comprises a hydrophobic material;

and

wherein each of the one or more filters is positioned at the end of the respective air passage of the one or more air passages so as to substantially prevent fluidic media from entering the respective air passage of the one or more air passages in a case where fluidic media is in the interior volume of the reservoir.

5. The system of claim 2,

the reservoir having a fluid channel that leads from the interior volume of the reservoir to the port of the reservoir;

wherein the one or more air passages surround the fluid channel of the reservoir.

6. The system of claim 2, wherein each of the one or more air passages exits the reservoir on a same side of the reservoir where the port of the reservoir is located.

7. The system of claim 2, wherein each of the one or more air passages allows air to exit the reservoir on a same side of the reservoir where fluidic media is expelled from the reservoir.

9. The system of claim 1,

wherein the one or more air passages connect the interior volume of the reservoir with the chamber of the reservoir;

and

wherein each of the one or more filters is for allowing air to pass from the interior volume of the reservoir to the chamber of the reservoir through the respective air passage of the one or more air passages of the reservoir and for inhibiting fluidic media from passing from the interior volume of the reservoir to the chamber of the reservoir through the respective air passage of the one or more air passages of the reservoir.

10. The system of claim 9, further comprising:

a bias member connected between a surface of the reservoir and the plunger head within the chamber of the reservoir.

11. The system of claim 10, wherein the bias member comprises a spring.

12. The system of claim 9, further comprising:

a valve for allowing a vacuum to be applied to the chamber of the reservoir.

13. The system of claim 9, wherein each of the one or more filters is a membrane comprising a hydrophobic material.

14. The system of claim 9:

wherein the one or more air passages connect the interior volume of the reservoir with the chamber of the reservoir; and

wherein each of the one or more filters is for allowing air to pass from the interior volume of the reservoir to the chamber of the reservoir through the respective air passage of the one or more air passages of the reservoir and for inhibiting fluidic media from passing from the interior volume of the reservoir to the chamber of the reservoir through the respective air passage of the one or more air passages of the reservoir.

17. The system of claim 1, the system comprising:

a second reservoir having an interior volume for containing air, the one or more air passages arranged to connect the interior volume of the reservoir and the interior volume of the second reservoir; and

a second plunger head moveable within the second reservoir;

wherein each of the one or more filters is for allowing air to pass from the interior volume of the first reservoir to the interior volume of the second reservoir through the respective air passage of the one or more air passages and for inhibiting fluidic media from passing from the interior volume of the reservoir to the interior volume of the second reservoir through the respective air passage of the one or more air passages.

18. The system of claim 17, wherein the plunger head and the second plunger head are configured to move substantially simultaneously.

19. The system of claim 17, the second plunger head operatively connected to the plunger head.

20. The system of claim 17, the reservoir having a septum, the septum pierceable by a needle for providing a fluid path between a vial containing fluidic media and the interior volume of the reservoir.

21. The system of claim 20,

the plunger head moveable within the reservoir between at least a first position and a second position;

the plunger head for drawing fluidic media from the vial into the interior volume of the reservoir in a case where the vial is connected to the reservoir and the plunger head is moved to the second position of the plunger head.

22. The system of claim 20,

the second plunger head moveable within the second reservoir between at least a first position and a second position;

wherein each of the one or more air filters is configured to allow air to pass from the interior volume of the first reservoir through the respective air passage of the one or more air passages to the interior volume of the second reservoir in a case where air is in the interior volume of the first reservoir and the second plunger head is moved to the second position of the second plunger head.

23. The system of claim 17,

the interior volume of the second reservoir located on one side of the second plunger head;

the second reservoir having a chamber on an opposite side of the second plunger head from the interior volume of the second reservoir;

the second reservoir having a port for expelling air from the interior volume of the second reservoir in a case where the interior volume of the second reservoir contains air and the port of the second reservoir and the interior volume of the second reservoir are in communication.

24. The system of claim 17,

wherein each of the one or more filters is membrane comprising a hydrophobic membrane.

26. The system of claim 1, the system comprising:

an inner reservoir having an interior volume, at least a portion of the inner reservoir configured to be moveable in the reservoir, the one or more air passages connecting the interior volume of the reservoir and the interior volume of the inner reservoir;

the plunger head moveable within the inner reservoir;

wherein each of the one or more filters is for allowing air to pass from the interior volume of the reservoir to the interior volume of the inner reservoir through the respective air passage of the one or more air passages and for inhibiting fluidic media from passing from the interior volume of the reservoir to the interior volume of the inner reservoir through the respective air passage of the one or more air passages.

27. The system of claim 26,

the plunger head moveable within the inner reservoir between at least a first plunger position and a second plunger position;

wherein a vacuum in the interior volume of the inner reservoir is created when the plunger head is moved from the first plunger position to the second plunger position.

28. The system of claim 27, the reservoir having a septum, the septum pierceable by a needle, the needle for providing a fluid path from a vial containing fluidic media to the interior volume of the reservoir.

29. The system of claim 28,

the inner reservoir configured to be moveable in the reservoir between at least a first inner reservoir position and a second inner reservoir position;

wherein fluidic media is drawn from the vial into the interior volume of the reservoir in a case where the interior volume of the reservoir is in fluid communication with the vial and the inner reservoir is moved from the first inner reservoir position to the second inner reservoir position.

30. The system of claim 26, wherein each of the one or more filters is a membrane comprising a hydrophobic filter.

31. The method of claim 9, the method comprising:

providing an inner reservoir having an interior volume, at least a portion of the inner reservoir configured to be moveable in the reservoir;

arranging the one or more air passages to connect the interior volume of the reservoir and the interior volume of the inner reservoir;

the plunger head moveable within the inner reservoir;

each of the one or more filters for allowing air to pass from the interior volume of the reservoir to the interior volume of the inner reservoir through the respective air passage of the one or more air passages and for inhibiting fluidic media from passing from the interior volume of the reservoir to the interior volume of the inner reservoir through the respective air passage of the one or more air passages.

32. The system of claim 1, wherein the plunger head is moveable within the reservoir relative to the one or more air passages as fluidic media is expelled from the interior volume of the reservoir out the port of the reservoir.

33. The system of claim 1, each of the one or more filters configured to allow air in the interior volume of the reservoir to pass through the filter and to exit the reservoir through the respective air passage of the one or more air passages as the plunger head moves, relative to the one or more filters, within the reservoir to expel fluidic media from the interior volume of the reservoir out the port of the reservoir.

34. The system of claim 1, the plunger head moveable within the reservoir along an axial dimension of the reservoir, each of the one or more filters having an axial dimension transverse the axial dimension of the reservoir.

35. The system of claim 1, wherein the port of the reservoir comprises the one or more air passages.

8. A method of making a system for managing air bubbles, the method comprising:

providing a reservoir having a wall defining an interior volume for containing fluidic media, the reservoir having a port for expelling fluidic media from the interior volume of the reservoir, the wall of the reservoir defining one or more air passages that extend out of the interior volume of the reservoir through the wall of the reservoir;

arranging a plunger head moveable within the reservoir, the plunger head arranged such that the interior volume of the reservoir is on one side of the plunger head and a chamber of the reservoir is on an opposite side of the plunger head from the interior volume of the reservoir, the plunger head in contact with fluidic media when fluidic media is in the interior volume of the reservoir; and

locating each of one or more filters in a respective air passage of the one or more air passages, each of the one or more filters configured to allow air in the interior volume of the reservoir to pass through the filter and to exit the reservoir through the respective air passage of the one or more air passages as the plunger head moves within the reservoir to expel fluidic media from the interior volume of the reservoir out the port of the reservoir.

25. The method of claim 8, the method comprising:

providing a second reservoir having an interior volume for containing air;

the one or more air passages to connect the interior volume of the reservoir and the interior volume of the second reservoir; and

;

locating a second plunger head moveable within the second reservoir;

each of the one or more filters for allowing air to pass from the interior volume of the reservoir to the interior volume of the second reservoir through the respective air passage of the one or more air passages and for inhibiting fluidic media from passing from the interior volume of the reservoir to the interior volume of the second reservoir through the respective air passage of the one or more air passages.

15. A system of managing air bubbles, the system comprising:

a reservoir having an interior volume for containing fluidic media, the reservoir having a port for expelling fluidic media from the interior volume of the reservoir, the reservoir having one or more air passages that extend out of the interior volume of the reservoir;

a plunger head moveable within the reservoir, the plunger head arranged such that the interior volume of the reservoir is on one side of the plunger head and a chamber of the reservoir is on an opposite side of the plunger head from the interior volume of the reservoir;

one or more filters, each of the one or more filters located in a respective air passage of the one or more air passages; and

a bellows member arranged in the chamber of the reservoir, the bellows member connected to the plunger head;

wherein the one or more air passages is arranged in the plunger head from a first surface of the plunger head to a second surface of the plunger head, the first surface of the plunger head in contact with fluidic media in a case where fluidic media is in the interior volume of the reservoir; and

wherein each of the one or more filter is located within the respective air passage of the one or more air passages of the plunger head, each of the one or more filters configured to allow air to pass from the interior volume of the reservoir to an interior volume of the bellows member through the respective air passage of the one or more air passages of the plunger head, each of the one or more filters configured to inhibit fluidic media from passing from the interior volume of the reservoir to the interior volume of the bellows member through the respective air passage of the one or more air passages of the plunger head in a case where fluidic media is in the interior volume of the reservoir.

16. A method of making a system for managing air bubbles, the method comprising:

providing a reservoir having an interior volume for containing fluidic media, the reservoir having a port for expelling fluidic media from the interior volume of the reservoir, the reservoir having one or more air passages that extend out of the interior volume of the reservoir;

arranging a plunger head moveable within the reservoir, the plunger head arranged such that the interior volume of the reservoir is on one side of the plunger head and a chamber of the reservoir is on an opposite side of the plunger head from the interior volume of the reservoir;

locating each of one or more filters in a respective air passage of the one or more air passages;

arranging a bellows member in the chamber of the reservoir; and

connecting the bellows member to the plunger head;

wherein the one or more air passages are arranged in the plunger head from a first surface of the plunger head to a second surface of the plunger head, the first surface of the plunger head in contact with fluidic media in a case where fluidic media is in the interior volume of the reservoir; and

wherein each of the one or more filters is configured to allow air to pass from the interior volume of the reservoir to an interior volume of the bellows member through the respective air passage of the one or more air passages of the plunger head, each of the one or more filters configured to inhibit fluidic media from passing from the interior volume of the reservoir to the interior volume of the bellows member through the respective air passage of the one or more air passages of the plunger head in a case where fluidic media is in the interior volume of the reservoir.