Method and apparatus for removing air or gas from fluid

• US 6,508,859 B1
• Filed: 11/13/2000
• Issued: 01/21/2003
• Est. Priority Date: 11/13/2000
• Status: Active Grant

• Current Assignee: Pentair Filtration Solutions, Llc (Pentair Plc (Ireland))
• Original Assignee: Porous Media Corporation (Pentair Plc (Ireland))
• Inventors: Cuta, Craig J., Hollnagel, Eric M., Zia, Majid
• Primary Examiner(s): SMITH, DUANE
• Application Number:
  US09/711,638
• Time in Patent Office: 799 Days
• Field of Search: 95/46, 952/41, 952/62, 952/54, 96/6, 961/55, 962/19, 962/20, 961/79, 210/188, 604/4, 604/405, 604/406
• US Class Current: 95/46
• CPC Class Codes: A61M 5/385 using hydrophobic filters
• CPC Class Codes: B01D 19/0031 by filtration

Abstract

A device for removing entrained air or gas from fluids includes a first chamber having a fluid inlet and an outlet, a second chamber, adjacent said first chamber, having a plurality of channels, a porous barrier separating the first chamber and the second chamber and a vent in fluid communication with the second chamber. The inlet is connected to the first chamber through at least one fluid passage. Fluid flows from the inlet, through the passage, and into the first chamber. A fluid dead zone adjacent the barrier assists an air or gas bubble to coalesce and pass through the barrier into the second chamber. The plurality of channels within the second chamber collect the air or gas and direct it to the vent in communication with the channels. A clip, or similar device, may be used to secure the device to medical equipment adjacent the patient or fluid source.

Claims

1. A method for removing entrained air or gas from fluids, comprising:

communicating a fluid from at least one fluid inlet to at least one side wall within a first chamber;

creating a fluid dead zone within said first chamber, and

filtering air or gas entrained in said fluid through a barrier adjacent said fluid dead zone into a second chamber.

2. The method defined in claim 1, and including the further step of,

venting said air or gas from said second chamber.

3. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising diverting an inlet flow through at least one fluid passage to said first chamber.

4. A method for removing entrained air or gas from fluids as defined in claim 3, further comprising diverting an inlet flow through at least two fluid passages to said first chamber.

5. A method for removing entrained air or gas from fluids as defined in claim 3, further comprising terminating said fluid passage adjacent said side wall.

6. A method for removing entrained air or gas from fluids as defined in claim 3, further comprising terminating said fluid passages adjacent said at least one side wall.

7. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising communicating said fluid along said at least one side wall to substantially prevent splashing.

8. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising communicating said fluid along said at least one side wall to minimize bubble generation.

9. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising communicating said fluid along said at least one side wall to promote bubble migration toward the barrier.

10. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising communicating said fluid along said at least one side wall to reduce fluid velocity in the main fluid flow direction.

11. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising raising the level of said fluid in said first chamber to coalesce air or gas proximate a barrier.

12. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising reducing the volume of said first chamber proximate said barrier.

13. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising creating a fluid dead zone proximate said barrier to enable said air or gas to coalesce and to assist said coalesced air or gas to pass through said barrier.

14. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising filtering said coalesced air or gas from said fluid dead zone to a second chamber.

15. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising collecting said transferred air or gas in a plurality of channels behind said barrier.

16. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising venting said collected air or gas.

17. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising preventing re-introduction of air or gas through said barrier by locating a check valve down stream of said barrier.

18. A method for removing entrained air or gas from fluids as defined in claim 1, further comprising preventing re-introduction of air or gas through said barrier by sizing an outlet to create back pressure against said barrier.

19. A bubble trap for fluids, including:

a) a first chamber, including;

1) a first wall portion, including;

a) an inlet end,

b) a plurality of sidewalls down standing from said first wall,

c) a plurality of down standing walls proximate said inlet end,

d) a portion of said first wall proximate said plurality of down standing walls biased toward said first wall portion, and

e) an outlet end, and

2) a second wall portion, including;

a) an inlet end,

b) a fluid inlet integrally formed within said inlet end,

c) a plurality of side walls upstanding from said second wall,

d) an outlet end, and

e) a fluid outlet integrally formed in said outlet end, and

b) a second chamber adjacent said first chamber, including;

1) plurality of interconnected channels, and

c) at least one porous barrier separating said first chamber from said second chamber.

20. A device for removing entrained air or gas from fluids, comprising:

a first chamber having at least one fluid inlet, at least one fluid outlet; and

at least one sidewall,

a second chamber adjacent said first chamber having a plurality of interconnected channels;

at least one porous barrier attached to said first chamber and separating said first chamber and said second chamber;

at least one fluid passage in communication with said inlet and terminating in said first chamber adjacent said at least one side wall.

22. A device for removing entrained air or gas from fluids as defined in claim 20, further comprising at least two fluid passages in communication with said inlet and each of said fluid passages terminating adjacent a distinct edge portion of said barrier different from said edge portion at which the other of said at least two passages terminated.

23. A device for removing entrained air or gas from fluids as defined in claim 22, further comprising said first chamber having a first wall and a second wall maintained in a substantially parallel, spaced-apart relationship by a plurality of upstanding side walls securely attached to said first and said second walls.

24. A device for removing entrained air or gas from fluids as defined in claim 23, further comprising said inlet and said outlet being integrally formed with said second wall.

25. A device for removing entrained air or gas from fluids as defined in claim 24, further comprising said inlet and said outlet integrally formed with said first wall.

26. A device for removing entrained air or gas from fluids as defined in claim 25, further comprising said first and second walls each having an inlet end and an outlet end.

27. A device for removing entrained air or gas from fluids as defined in claim 26, further comprising said inlet end and said outlet end are rounded.

28. A device for removing entrained air or gas from fluids as defined in claim 26, further comprising said inlet end and said outlet end are multi-faceted.

29. A device for removing entrained air or gas from fluids as defined in claim 26, further comprising said inlet end and said outlet end are oval.

30. A device for removing entrained air or gas from fluids as defined in claim 26, further comprising said inlet end and said outlet end are U-shaped.

31. A device for removing entrained air or gas from fluids as defined in claim 26, further comprising said inlet end and said outlet end are elliptical.

32. A device for removing entrained air or gas from fluids as defined in claim 25, further comprising said passages formed by said first wall having a down standing portion, said down standing portion formed in a parallel, spaced-apart relationship with said inlet end.

33. A device for removing entrained air or gas from fluids as defined in claim 32, further comprising said down standing portion substantially directing said fluid into said passages.

34. A device for removing entrained air or gas from fluids as defined in claim 33, further comprising said passages formed by said second wall having an upstanding portion, said upstanding portion formed in a parallel, spaced-apart relationship with said inlet end.

35. A device for removing entrained air or gas from fluids as defined in claim 34, further comprising said upstanding portion substantially directing said fluid into said passages.

36. A device for removing entrained air or gas from fluids as defined in claim 35, further comprising a male engagement portion securely attached to said first wall proximate said inlet end.

37. A device for removing entrained air or gas from fluids as defined in claim 36, further comprising a female engagement portion securely attached to said second wall proximate said inlet end.

38. A device for removing entrained air or gas from fluids as defined in claim 37, further comprising a fluid dead zone located proximate said barrier.

39. A device for removing entrained air or gas from fluids as defined in claim 38, further comprising said fluid dead zone located substantially between said side walls and adjacent said barrier.

40. A device for removing entrained air or gas from fluids as defined in claim 39, further comprising said side walls of said first wall having a tongue portion and said side walls of said second wall having a groove portion, said tongue and groove portions combine to seal said first and said second walls in a spaced-apart relationship.

41. A device for removing entrained air or gas from fluids as defined in claim 40, further comprising said side walls of said first and second walls sonically welded together.

42. A device for removing entrained air or gas from fluids as defined in claim 41, further comprising said first wall biased toward said second wall proximate said inlet end.

43. A device for removing entrained air or gas from fluids as defined in claim 42, further comprising said passages terminating adjacent said side wall.

44. A device for removing entrained air or gas from fluids as defined in claim 43, further comprising said barrier being a hydrophobic porous barrier with backing support.

45. A device for removing entrained air or gas from fluids as defined in claim 44, further comprising said barrier is a bacteria retention material.

46. A device for removing entrained air or gas from fluids as defined in claim 45, further comprising said barrier is approximately 0.2 microns thick.

47. A device for removing entrained air or gas from fluids as defined in claim 46, further comprising said second chamber integrally formed with said second wall.

48. A device for removing entrained air or gas from fluids as defined in claim 47, further comprising said vent located proximate said inlet end on a side wall.

49. A device for removing entrained air or gas from fluids as defined in claim 48, further comprising a check valve located downstream of said vent to prevent gas re-introduction into said fluid through said barrier.

50. A device for removing entrained air or gas from fluids as defined in claim 49, further comprising said outlet sized to provide sufficient back pressure against said barrier to prevent gas re-introduction through said barrier.

51. A device for removing entrained air or gas from fluids as defined in claim 50, further comprising an attachment means for securely attaching, and maintain in an upright position, said device.

52. A device for removing entrained air or gas from fluids as defined in claim 51, further comprising said attachment means is a clip located on a side wall of said first wall.

53. A device for removing entrained air or gas from fluids as defined in claim 52, wherein said attachment means is a clip attached to said second chamber.

54. A device for removing entrained air or gas from fluids as defined in claim 53, further comprising said vent is a fluid connection between said channels and a one way diaphragm attached to said second chamber.

21. A device for removing entrained air or gas from fluids, comprising:

a first chamber having at least one fluid inlet, at least one fluid outlet; and

at least one sidewall,

a second chamber adjacent said first chamber having a plurality of interconnected channels;

at least one porous barrier attached to said first chamber and separating said first chamber and said second chamber;

at least one fluid passage in communication with said inlet and terminating in said first chamber adjacent said at least one side wall, and

a vent in fluid communication with said channels.

55. In a pressure infusion system, a device for removing entrained gas from fluids comprising:

A device for removing entrained air or gas from fluids, comprising;

a first chamber having at least one fluid inlet and at least one outlet;

a second chamber adjacent said first chamber having a plurality of interconnected channels;

at least one porous barrier separating said first chamber and said second chamber;

at least one fluid passage in communication with said inlet and terminating in said first chamber adjacent an edge portion of said barrier; and

a vent in fluid communication with said channels.

56. In a blood warming system, a device for removing entrained gases from blood comprising:

A device for removing entrained air or gas from fluids, comprising;

a first chamber having at least one fluid inlet and at least one outlet;

a second chamber adjacent said first chamber having a plurality of interconnected channels;

at least one porous barrier separating said first chamber and said second chamber;

at least one fluid passage in communication with said inlet and terminating in said first chamber along an edge portion of said barrier; and

a vent in fluid communication with said channels.

57. A system for removing entrained air or gas from intravenous fluids, comprising:

a pressure infusion system in fluid communication with an intravenous fluid source;

a fluid warming device in fluid communication with said pressure infusion system;

a bubble trap in fluid communication with said fluid warming device;

said bubble trap comprising;

a first chamber having at least one fluid inlet and at least one outlet;

a second chamber adjacent said first chamber having a plurality of interconnected channels;

at least one porous barrier separating said first chamber and said second chamber;

at least one fluid passage in communication with said inlet and terminating in said first chamber along an edge portion of said barrier; and

a vent in fluid communication with said channels; and

a fluid connection between said bubble trap and a fluid recipient.