Aerosol medication delivery apparatus and system

• US 6,345,617 B1
• Filed: 09/26/1997
• Issued: 02/12/2002
• Est. Priority Date: 09/26/1997
• Status: Expired due to Term

• Current Assignee: Trudell Medical International (Trudell Medical Limited)
• Original Assignee: 1263152 Ontario Inc.
• Inventors: Mitchell, Jolyon P., Morton, Robert, Foley, Martin, Nagel, Mark, Engelbreth, Dan
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): MITCHELL, TEENA KAY
• Application Number:
  US08/938,686
• Time in Patent Office: 1,600 Days
• Field of Search: 128/200.23, 128/200.18, 128/203.23, 128/203.18, 128/203.21, 128/200.14, 128/200.24, 128/205.24
• US Class Current: 128/200.23
• CPC Class Codes: A61M 11/002 by flow deviation causing inertial separation of transported particles
• CPC Class Codes: A61M 11/003 by passing the aerosol trough sieves or filters
• CPC Class Codes: A61M 15/0086 Inhalation chambers
• CPC Class Codes: A61M 15/009 using medicine packages with incorporated spraying means, e.g. aerosol cans pocket atomiser of the injector type A61M11/08

Abstract

An improved aerosol medication delivery apparatus and system. The aerosol medication delivery apparatus includes a canister-holding portion and a chamber housing. The canister-holding portion has a receptacle for receipt of a pMDI canister containing a medication and a propellant to provide the aerosol medication delivery system. The canister-holding portion has a discharge orifice communicating with the receptacle to direct an aerosol into an interior of the chamber housing at an input end thereof. The chamber housing also has an output end from which medication can be withdrawn by inhalation by a patient. According to one aspect, the aerosol delivery system includes a containment baffle located at the output end of the chamber housing to partially block the output. According to another aspect, the canister-holding portion and the chamber housing are coupled together by a mechanism that provides for the canister-holding portion to be retracted into the chamber housing for storage. The coupling mechanism also allows the canister-holding portion to be extracted from its storage position in the chamber housing and pivoted into position for use when dispensing medication. In another aspect, an aerosol medication apparatus includes a chamber housing with an input end to receive the discharge of a medication from a pMDI canister and an output end including a containment baffle that partially blocks the output end. The pMDI canister may be received in an elastomeric backpiece that is adapted to accommodate various sizes of actuator boot mouthpieces.

Claims

1. An aerosol medication delivery apparatus for use with a pressurized metered dose inhaler canister having medication and a propellant contained therein under pressure, where the pressurized metered dose inhaler canister has a discharge orifice from which the medication and the propellant can be discharged forming an aerosol, the apparatus comprising:

a chamber housing having an input end and an output end and defining an interior space, wherein said input end is adapted to receive a medication discharged from the discharge orifice of a pressurized metered dose inhaler canister into said interior space and said chamber housing having a central axis and a downstream end; and

a containment baffle located at said downstream end of said chamber housing to partially block said output end, wherein said containment baffle has a curved portion located along and intersecting said central axis of said chamber housing, wherein said curved portion of said containment baffle remains fixed along said central axis relative to said output end of said chamber housing, and wherein said curved portion has a concave surface facing said input end of said chamber housing.

2. The invention of claim 1 further comprising a mouthpiece located at said output end of said chamber housing, wherein said mouthpiece forms said containment baffle.

3. The invention of claim 2 wherein said interior space of said chamber housing has a first cross-sectional area perpendicular to said central axis, and wherein said mouthpiece defines an interior space having a second cross-sectional area perpendicular to said central axis, wherein said second cross-sectional area is less than said first cross-sectional area.

4. The invention of claim 2 further comprising a curved shoulder portion transitioning between said chamber housing and said mouthpiece.

5. The invention of claim 4 wherein an inner surface of said curved shoulder portion is concave.

6. The invention of claim 2 wherein said containment baffle is located at a downstream end of said mouthpiece.

7. The invention of claim 2 wherein said containment baffle is located at an upstream end of said mouthpiece.

8. The invention of claim 1 wherein said containment baffle defines an inhalation opening area located around a periphery thereof.

9. The invention of claim 8 wherein said inhalation opening area comprises a plurality of openings.

10. The invention of claim 9 wherein said openings are arcuate shaped.

11. An aerosol medication delivery apparatus for use with a pressurized metered dose inhaler canister having medication and a propellant contained therein under pressure, where the pressurized metered dose inhaler canister has a discharge orifice from which the medication and the propellant can be discharged forming an aerosol, the apparatus comprising:

a chamber housing having an input end and an output end and defining an interior space, wherein said input end is adapted to receive a medication discharged from the discharge orifice of a pressurized metered dose inhaler canister into said interior space and said chamber housing having a central axis and a downstream end; and

a containment baffle located at said downstream end of said chamber housing to partially block said output end, wherein said containment baffle has a curved portion located along and intersecting said central axis of said chamber housing, wherein said curved portion of said containment baffle remains fixed along said central axis relative to said output end of said chamber housing, and wherein said curved portion has a convex surface facing said input end of said chamber housing.

12. The invention of claim 11 further comprising a mouthpiece located at said output end of said chamber housing, wherein said mouthpiece forms said containment baffle.

13. The invention of claim 12 wherein said interior space of said chamber housing has a first cross-sectional area perpendicular to said central axis, and wherein said mouthpiece defines an interior space having a second cross-sectional area perpendicular to said central axis, wherein said second cross-sectional area is less than said first cross-sectional area.

14. The invention of claim 12 further comprising a curved shoulder portion transitioning between said chamber housing and said mouthpiece.

15. The invention of claim 14 wherein an inner surface of said curved shoulder is concave.

16. The invention of claim 12 wherein said containment baffle is located at a downstream end of said mouthpiece.

17. The invention of claim 12 wherein said containment baffle is located at an upstream end of said mouthpiece.

18. The invention of claim 11 wherein said containment baffle defines an inhalation opening area located around a periphery thereof.

19. The invention of claim 18 wherein said inhalation opening area comprises a plurality of openings.

20. The invention of claim 19 wherein said openings are arcuate shaped.

21. An aerosol medication delivery apparatus for use with a pressurized metered dose inhaler canister having medication and a propellant contained therein under pressure, where the pressurized metered dose inhaler canister has a discharge orifice from which the medication and the propellant can be discharged forming an aerosol, the apparatus comprising:

a chamber housing having an input end and an output end and defining an interior space, wherein said input end is adapted to receive a medication discharged from the discharge orifice of a pressurized metered dose inhaler canister into said interior space and said chamber housing having a central axis and a downstream end; and

a containment baffle located at said downstream end of said chamber housing to partially block said output end, wherein said containment baffle has a curved portion located along and intersecting said central axis of said chamber housing, wherein said curved portion of said containment baffle remains fixed along said central axis relative to said output end of said chamber housing, and wherein said curved portion is domed and includes a concave surface and a convex surface.

22. An aerosol medication delivery apparatus for use with a pressurized metered dose inhaler canister having medication and a propellant contained therein under pressure, where the pressurized metered dose inhaler canister has a discharge orifice from which the medication and the propellant can be discharged forming an aerosol, the apparatus comprising:

a chamber housing comprising an input end, an output end and a central axis, wherein said chamber housing defines an interior space, wherein said input end is adapted to receive a medication discharged from the discharge orifice of a pressurized metered dose inhaler canister into said interior space;

a mouthpiece extending from said output end of said chamber housing, said mouthpiece comprising a containment baffle that blocks at least a portion of said output end, wherein said containment baffle has a curved portion located along and intersecting said central axis of said chamber housing, wherein said curved portion of said containment baffle remains fixed along said central axis relative to said output end of said chamber housing, and wherein said curved portion has a concave surface facing said input end of said chamber housing; and

a curved shoulder portion transitioning between said chamber housing and said mouthpiece, wherein said curved shoulder portion has an interior concave surface.

23. The invention of claim 22 wherein said interior space of said chamber housing has a first cross-sectional area perpendicular to said central axis, and wherein said mouthpiece defines an interior space having a second cross-sectional area perpendicular to said central axis, wherein said second cross-sectional area is less than said first cross-sectional area.

24. The invention of claim 22 wherein said containment baffle defines an inhalation opening area located around a periphery thereof.

25. The invention of claim 24 wherein said inhalation opening area comprises a plurality of openings.

26. The invention of claim 25 wherein said oepnings are arcuate shaped.

27. The invention of claim 22 wherein said containment baffle is located at a downstream end of said mouthpiece.

28. The invention of claim 22 wherein said containment baffle is located at an upstream end of said mouthpiece.

29. An aerosol medication delivery apparatus for use with a pressurized metered dose inhaler canister having medication and a propellant contained therein under pressure, where the pressurized metered dose inhaler canister has a discharge orifice from which the medication and the propellant can be discharged forming an aerosol, the apparatus comprising:

a chamber housing comprising an input end, an output end and a central axis, wherein said chamber housing defines an interior space, wherein said input end is adapted to receive a medication discharged from the discharge orifice of a pressurized metered dose inhaler canister into said interior space;

a mouthpiece extending from said output end of said chamber housing, said mouthpiece comprising a containment baffle that blocks at least a portion of said output end, wherein said containment baffle has a curved portion located along and intersecting said central axis of said chamber housing, wherein said curved portion of said containment baffle remains fixed along said central axis relative to said output end of said chamber housing, and wherein said curved portion has a convex surface facing said input end of said chamber housing; and

curved shoulder portion transitioning between said chamber housing and said mouthpiece, wherein said curved shoulder portion has an interior concave surface.

30. The invention of claim 29 wherein said interior space of said chamber housing has a first cross-sectional area perpendicular to said central axis, and wherein said mouthpiece defines an interior space having a second cross-sectional area perpendicular to said central axis, wherein said second cross-sectional area is less than said first cross-sectional area.

31. The invention of claim 29 wherein said containment baffle defines an inhalation opening area located around a periphery thereof.

32. The invention of claim 31 wherein said inhalation opening area comprises a plurality of openings.

33. The invention of claim 32 wherein said openings are arcuate shaped.

34. The invention of claim 29 wherein said containment baffle is located at a downstream end of said mouthpiece.

35. The invention of claim 29 wherein said containment baffle is located at an upstream end of said mouthpiece.

36. An aerosol medication delivery apparatus for use with a pressurized metered dose inhaler canister having medication and propellant contained therein under pressure, where the pressurized metered dose inhaler canister has a discharge orifice from which the medication and the propellant can be discharged forming an aerosol, the apparatus comprising:

a chamber housing comprising an input end, an output end and a central axis, wherein said chamber housing defines an interior space, wherein said input end is adapted to receive a medication discharged from the discharge orifice of a pressurized metered dose inhaler canister into said inter space;

mouthpiece extending from said output end of said chamber housing, said mouthpiece comprising a containment baffle that blocks at least a portion of said output end, wherein said containment baffle has a curved portion located along and intersecting said central axis of said chamber housing, wherein said curved portion of said containment baffle remains fixed along said central axis relative to said output end of said chamber housing, and wherein said curved portion is domed and includes a concave surface and a convex surface; and

.

a curved shoulder portion transitioning between said chamber housing and said mouthpiece, wherein said curved shoulder portion has an interior concave surface.

37. A method for administering medication from a pressurized metered dose inhaler canister having the medication and a propellant contained therein under pressure, where the pressurized metered dose inhaler canister has a discharge orifice from which the medication and the propellant can be discharged forming an aerosol, the method comprising:

providing a chamber housing having an input end and an output end and defining an interior space, wherein said chamber housing has a central axis and a downstream end;

a containment baffle located at said downstream end of the chamber housing to partially block said output end, wherein said containment baffle has a curved portion located along and intersecting said central axis of said chamber housing, wherein said curved portion has a concave surface facing said input end of said chamber housing and wherein said curved portion of said containment baffle remains fixed along said central axis relative to said output end of said chamber housing;

discharging said medication into said chamber housing from said pressurized metered dose inhaler canister;

passing said medication through said baffle; and

inhaling said medication.

38. The invention of claim 37 further comprising a mouthpiece located at said output end of said chamber housing, wherein mouthpiece forms said containment baffle, and further comprising disposing said mouthpiece in the mouth of a user prior to said inhaling.

39. The invention of claim 38 wherein said interior space of said chamber housing has a first cross-sectional area perpendicular to said central axis, and wherein said mouthpiece defines an interior space having a second cross-sectional area perpendicular to said central axis, wherein said second cross-sectional area is less than said first cross-sectional area.

40. The invention of claim 38 wherein said containment baffle is located at a downstream end of said mouthpiece.

41. The invention of claim 37 wherein said containment baffle defines an inhalation opening area located around a periphery thereof, and wherein said inhaling comprises passing said medication through said inhalation opening area.

42. The invention of claim 41 wherein said inhalation opening area comprises a plurality of openings.

43. A method for administering medication from a pressurized metered dose inhaler canister having the medication and a propellant contained therein under pressure, where the pressurized metered dose inhaler canister has a discharge orifice from which the medication and the propellant can be discharged forming an aerosol, the method comprising:

providing a chamber housing having an input end and an output end and defining an interior space, wherein said chamber housing has a central axis and a downstream end;

a containment baffle located at said downstream end of the chamber housing to partially block said output end, wherein said containment baffle has a curved portion located along and intersecting said central axis of said chamber housing, wherein said curved portion has a convex surface facing said input end of said chamber housing and wherein said curved portion of said containment baffle remains fixed along said central axis relative to said output end of said chamber housing;

discharging said medication into said chamber housing from said pressurized metered dose inhaler canister;

passing said medication through said baffle; and

inhaling said medication.

44. The invention of claim 43 further comprising a mouthpiece located at said output end of said chamber housing, wherein mouthpiece forms said containment baffle, and further comprising disposing said mouthpiece in the mouth of a user prior to said inhaling.

45. The invention of claim 44 wherein said interior space of said chamber housing has a first cross-sectional area perpendicular to said central axis, and wherein said mouthpiece defines an interior space having a second cross-sectional area perpendicular to said central axis, wherein said second cross-sectional area is less than said first cross-sectional area.

46. The invention of claim 44 wherein said containment baffle is located at a downstream end of said mouthpiece.

47. The invention of claim 43 wherein said containment baffle defines an inhalation opening area located around a periphery thereof, and wherein said inhaling comprises passing said medication through said inhalation opening area.

48. The invention of claim 47 wherein said inhalation opening area comprises a plurality of openings.

49. A method for administering medication from a pressurized metered dose inhaler canister having the medication and a propellant contained therein under pressure, where the pressurized metered dose inhaler canister has a discharge orifice from which the medication and the propellant can be discharged forming an aerosol, the method comprising:

providing a chamber housing comprising an input end, an output end and a central axis, wherein said chamber housing defines an interior space;

a mouthpiece extending from said output end of said chamber housing, wherein said mouthpiece comprising a containment baffle that blocks at least a portion of said output end, wherein said containment baffle has a curved portion located along and intersecting said central axis of said chamber housing, wherein said curved portion has a concave surface facing said input end of said chamber housing and wherein said curved portion of said containment baffle remains fixed along said central axis relative to said output end of said chamber housing; and

a curved shoulder portion transitioning between said chamber housing and said mouthpiece, wherein said curved shoulder portion has an interior concave surface;

discharging said medication into said chamber housing from said pressurized metered dose inhaler canister;

disposing said mouthpiece in a mouth of a user;

passing said medication through said baffle; and

inhaling said medication.

50. The invention of claim 49 wherein said interior space of said chamber housing has a first cross-sectional area perpendicular to said central axis, and wherein said mouthpiece defines an interior space having a second cross-sectional area perpendicular to said central axis, wherein said second cross-sectional area is less than said first cross-sectional area.

51. The invention of claim 49 wherein said containment baffle defines an inhalation opening area located around a periphery thereof, and wherein said inhaling comprises passing said medication through said inhalation opening area.

52. The invention of claim 51 wherein said inhalation opening area comprises a plurality of openings.

53. The invention of claim 52 wherein said openings are arcuate shaped.

54. A method for administering medication from a pressurized metered dose inhaler canister having the medication and a propellant contained therein under pressure, where the pressurized metered dose inhaler canister has a discharge orifice from which the medication and the propellant can be discharged forming an aerosol, the method comprising:

providing a chamber housing comprising an input end, an output end and a central axis, wherein said chamber housing defines an interior space;

a mouthpiece extending from said output end of said chamber housing, wherein said mouthpiece comprising a containment baffle that blocks at least a portion of said output end, wherein said containment baffle has a curved portion located along and intersecting said central axis of said chamber housing, wherein said curved portion has a convex surface facing said input end of said chamber housing and wherein said curved portion of said containment baffle remains fixed along said central axis relative to said output end of said chamber housing; and

a curved shoulder portion transitioning between said chamber housing and said mouthpiece, wherein said curved shoulder portion has an interior concave surface;

discharging said medication into said chamber housing from said pressurized metered dose inhaler canister;

disposing said mouthpiece in a mouth of a user;

passing said medication through said baffle; and

inhaling said medication.

55. The invention of claim 54 wherein said interior space of said chamber housing has a first cross-sectional area perpendicular to said central axis, and wherein said mouthpiece defines an interior space having a second cross-sectional area perpendicular to said central axis, wherein said second cross-sectional area is less than said first cross-sectional area.

56. The invention of claim 54 wherein said containment baffle defines an inhalation opening area located around a periphery thereof, and wherein said inhaling comprises passing said medication through said inhalation opening area.

57. The invention of claim 56 wherein said inhalation opening area comprises a plurality of openings.

58. The invention of claim 57 wherein said openings are arcuate shaped.