Visual indicator for an aerosol medication delivery apparatus and system

• US 6,904,908 B2
• Filed: 05/07/2003
• Issued: 06/14/2005
• Est. Priority Date: 05/21/2002
• Status: Active Grant

• Current Assignee: Trudell Medical International (Trudell Medical Limited)
• Original Assignee: Trudell Medical International (Trudell Medical Limited)
• Inventors: Schmidt, James N., Bruce, Sarah
• Primary Examiner(s): Bennett, Henry
• Assistant Examiner(s): MITCHELL, TEENA KAY
• Application Number:
  US10/431,325
• Publication Number:
  US 20030234015A1
• Time in Patent Office: 769 Days
• Field of Search: 128/200.11, 128/200.12, 128/200.14, 128/200.18, 128/200.21, 128/200.22, 128/200.23, 128/200.24, 128/203.12, 128/203.15, 128/203.18, 128/203.21, 128/203.29, 128/205.23, 128/205.24
• US Class Current: 128/200.23
• CPC Class Codes: A61M 15/0016 located downstream of the dispenser, i.e. traversed by the product
• CPC Class Codes: A61M 15/0018 with exhalation check valves
• 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
• CPC Class Codes: A61M 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/0616 with face sealing means comprising a flap or membrane projecting inwards, such that sealing increases with increasing inhalation gas pressure
• CPC Class Codes: A61M 16/14 by mixing different fluids, one of them being in a liquid phase
• CPC Class Codes: A61M 16/208 Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2207/00 Methods of manufacture, assembly or production
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A flow indicating system that includes a conduit that contains a substance, wherein the conduit defines a path along which the substance primarily flows and a viewing port attached to the conduit and the viewing port prevents substantially non-ambient atmosphere gases and substances from escaping therefrom and allows visualization of an internal space defined by the viewing port. A flow indicator that is positioned within the conduit so as to be viewed via the viewing port and is positioned so as to not to substantially interfere with a flow of the substance along the path.

Claims

1. A delivery system comprising:

a chamber that contains a substance in an interior volume of space formed within said chamber;

an opening that receives said substance located in said volume of space and introduces said substance to a downstream path upon which said substance primarily flows along;

an interface that receives said substance from said opening, said interface comprising a viewing port that substantially prevents non-ambient atmosphere gases and substances from escaping therefrom and allows visualization of an internal portion of said interface; and

a flow indicator that is positioned within said interface so as to be viewed via said viewing port and is positioned so as to not substantially interfere with a flow of said substance along said path, said flow indicator moveable between at least an at-rest position and an inhalation position, wherein one or both of said flow indicator and said interface prevent entrainment of ambient air into said flow of said substance along said path when said flow indicator is in said inhalation position.

2. The delivery system of claim 1, wherein said chamber is in fluid communication with a source of said substance.

3. The delivery system of claim 2, wherein said source is a pMDI canister.

4. The delivery system of claim 3, wherein said chamber receives said pMDI canister so as to be integrated thereto.

5. The delivery system of claim 3, wherein said chamber is a holding chamber.

6. The delivery system of claim 1, wherein said substance is a dry powder.

7. The delivery system of claim 1, wherein said substance is a liquid.

8. The delivery system of claim 1, further comprising a valve positioned downstream of said opening so as to receive said substance along said path.

9. The delivery system of claim 8, wherein said valve comprises a duckbill valve.

10. The delivery system of claim 8, further comprising a retaining disc positioned downstream of said opening so as to receive said substance along said path.

11. The delivery system of claim 10, wherein said retaining disc comprises:

an annular ring that surrounds a second opening;

a portion positioned within said second opening; and

an appendage that connects said annular ring to said portion.

12. The delivery system of claim 1, wherein said flow indicator moves from a first position when no external pressure is applied to said substance flowing along said path to a second position when an external pressure is applied to said substance flowing along said path.

13. The delivery system of claim 12, wherein said interface further comprises a mask that receives said substance from said interior volume of said chamber, said mask comprising an exit port wherein exhaled gases substantially flows through said exit port when said external pressure is applied.

14. The delivery system of claim 1, wherein said interface further comprises a mask that receives said substance from said interior volume of said chamber.

15. The delivery system of claim 1, wherein said chamber is coupled to said interface.

16. The delivery system of claim 15, wherein said chamber comprises an engagement tab that is received within a slot of said interface.

17. A delivery system comprising:

a chamber that contains a substance in an interior volume of space formed within said chamber;

an opening that receives said substance located in said volume of space and introduces said substance to a downstream path upon which said substance primarily flows along;

an interface that receives said substance from said opening, said interface comprising a viewing port that substantially prevents non-ambient atmosphere gases and substances from escaping therefrom and allows visualization of an internal portion of said interface;

a valve positioned downstream of said opening so as to receive said substance along said path; and

a flow indicator that is positioned within said interface so as to be viewed via said viewing port and is positioned so as to not substantially interfere with a flow of said substance along said path, wherein said flow indicator is attached to said valve.

18. A delivery system comprising:

a chamber that contains a substance in an interior volume of space formed within said chamber;

an opening that receives said substance located in said volume of space and introduces said substance to a downstream path upon which said substance primarily flows along;

an interface that receives said substance from said opening, said interface comprising a viewing port that substantially prevents non-ambient atmosphere gases and substances from escaping therefrom and allows visualization of an internal portion of said interface;

a flow indicator that is positioned within said interface so as to be viewed via said viewing port and is positioned so as to not substantially interfere with a flow of said substance along said path; and

a retaining disc positioned downstream of said opening so as to receive said substance along said path.

19. The delivery system of claim 18, wherein said retaining disc comprises:

an annular ring that surrounds a second opening;

a portion positioned within said second opening; and

an appendage that connects said annular ring to said portion.

20. A delivery system comprising:

a chamber means for introducing a substance to a downstream path upon which said substance primarily flows;

an interface means for receiving said substance from said chamber means, said interface means comprising a viewing port means for allowing visualization of an internal portion of said interface means;

means for substantially preventing non-ambient atmosphere gases and substances from escaping from said interface means;

a flow indicator means for being viewed and indicating that inhalation is occurring, and for not substantially interfering with a flow of said substance along said path; and

means for preventing entrainment of ambient air in said path while said flow indicator means is indicating that said inhalation is occurring.

21. The delivery system of claim 20, wherein said chamber means is in fluid communication with a source means for supplying said substance to said chamber means.

22. The delivery system of claim 20, wherein said substance is a dry powder.

23. The delivery system of claim 20, wherein said substance is a liquid.

24. The delivery system of claim 20, further comprising a valve means for receiving said substance along said path.

25. The delivery system of claim 20, further comprising a retaining disc means for receiving said substance along said path.

26. The delivery system of claim 20, wherein said interface means further comprises a mask means for receiving said substance from said chamber means.

27. A method of determining whether a patient is inhaling or exhaling when using a delivery system, said method comprising:

dispensing a substance located within an interior volume of a delivery system so that said substance will primarily flow along a path within said delivery system after being dispensed;

moving a flow indicator from at least an at-rest position to an inhalation position;

observing a position of said flow indicator located within said delivery system and located so as not to substantially interfere with said substance flowing along said path;

preventing entrainment of ambient air past said flow indicator when said flow indicator is moved to said inhalation position;

substantially preventing non-ambient atmosphere gases and substances from escaping past said flow indicator; and

determining whether a user of said delivery system is inhaling from said delivery system based on said observed position of said flow indicator.

28. A flow indicating system comprising:

a conduit adapted to contain a substance, wherein said conduit defines a flow path along which the substance is adapted to primarily flow;

a viewing port connected to said conduit, said viewing port adapted to substantially prevent non-ambient atmosphere gases and substances from escaping therefrom, wherein said viewing port allows visualization of an internal space defined by said viewing port; and

a flow indicator positioned within and visible through said viewing port, wherein said flow indicator is positioned substantially outside of said flow path, said flow indicator moveable between at least an at-rest position and an inhalation position, one or both of said viewing port and said flow indicator adapted to prevent entrainment of ambient air into said flow path when said flow indicator is in said inhalation position.

29. The flow indicating system of claim 28 further comprising:

an attachment collar connected to said conduit;

a transition piece attached to said attachment collar;

said viewing port connected to one of said attachment collar and said transition piece; and

an exit port attached to said transition piece, wherein said transition piece and said exit port define at least in part said flow path.

30. The flow indicating system of claim 29, wherein a slot is formed in said attachment collar.

31. The flow indicating system of claim 28, wherein said viewing port is made of a clear material.

32. The flow indicating system of claim 28, wherein said visual flow indicator moves from a first position when said substance flows along said path to a second position when no substance flows along said path.

33. A flow indicating system comprising:

a conduit adapted to contain a substance, wherein said conduit defines a flow path along which the substance is adapted to primarily flow;

a viewing port connected to said conduit, said viewing port adapted to substantially prevent non-ambient atmosphere gases and substances from escaping therefrom, wherein said viewing port allows visualization of an internal space defined by said viewing port; and

a flow indicator positioned within and visible through said viewing port, wherein said flow indicator is positioned substantially outside of said flow path, wherein said flow indicator is attached to a valve.

34. The flow indicating system of claim 33, wherein said valve comprises a duckbill valve.

35. A delivery system comprising:

a chamber having an interior volume of space formed within said chamber and an opening communicating with said interior volume and defining at least in part a flow path;

an interface communicating with said opening;

a viewing port connected to at least one of said interface and said chamber, wherein at least a portion of said viewing port is see-through; and

a flow indicator positioned within said viewing port and visible through said see-through portion of said viewing port, wherein said flow indicator is positioned substantially outside of said flow path and is moveable between at least an at-rest position and an inhalation position in response to an inhalation pressure being applied thereto, wherein said flow indicator is biased toward said at-rest position in the absence of the inhalation pressure.

36. The delivery system of claim 35 further comprising a stop member, wherein said flow indicator engages said stop member when in said at-rest position.

37. The delivery system of claim 36 further comprising a sealing surface, wherein said flow indicator engages said sealing surface when in said inhalation position.

38. The delivery system of claim 36 wherein said flow indicator is pivoted between about 25 degrees an&

about 45 degrees between said at-rest position and said inhalation position.

39. The delivery system of claim 36 wherein said flow indicator is in said at-rest position when no external pressure is applied thereto and wherein said flow indicator is in said inhalation position when an external pressure is applied thereto.

40. The delivery system of claim 35 wherein said chamber is a holding chamber.

41. The delivery system of claim 35 further comprising a valve positioned downstream of said opening.

42. The delivery system of claim 41 wherein said flow indicator is attached to said valve.

43. The delivery system of claim 41 wherein said valve comprises a duckbill valve.

44. The delivery system of claim 35 further comprising a baffle member positioned adjacent said opening with at least a portion of said baffle member being positioned in said flow path.

45. The delivery system of claim 44 wherein said baffle member comprises an annular ring and a central portion positioned within said flow path and connected to said annular ring with at least one appendage.

46. The delivery system of claim 35 wherein said interface further comprises a mask.

47. The delivery system of claim 46 wherein said mask comprises an exit port.

48. The delivery system of claim 35 wherein said chamber is coupled to said interface.

49. The delivery system of claim 48 wherein said chamber comprises an engagement tab that is received within a slot formed in said interface.

50. The delivery system of claim 35 wherein said interface is made of clear plastic.

51. The delivery system of claim 35 further comprising a spring biasing said flow indicator to said at-rest position.

52. The delivery system of claim 51 wherein said spring is formed by a resilient portion of said flow indicator.