Device and method for inducing sputum and collecting samples

• US 6,984,214 B2
• Filed: 02/02/2004
• Issued: 01/10/2006
• Est. Priority Date: 01/07/2002
• Status: Active Grant

• Current Assignee: Medical Acoustics LLC
• Original Assignee: Medical Acoustics LLC
• Inventors: Fowler-Hawkins, Sanford Elliot
• Primary Examiner(s): Huson, Gregory L.
• Assistant Examiner(s): Thanh, Quang D.
• Application Number:
  US10/770,315
• Publication Number:
  US 20040158178A1
• Time in Patent Office: 708 Days
• Field of Search: 844/10, 844/02, 843/63, 128/204.18, 128/202.29, 128/202.28, 128/200.24, 482/13, 601/41, 601/43, 601/46, 601/47
• US Class Current: 601/46
• CPC Class Codes: A61H 23/0236 using sonic waves, e.g. using loudspeakers
• CPC Class Codes: A61M 16/0006 with means for creating vibrations in patients' airways
• CPC Class Codes: A61M 16/08 Bellows; Connecting tubes having means for taking samples G01N1/22; Water traps; Patient circuits
• CPC Class Codes: A63B 23/18 for improving respiratory function

Abstract

A device for thinning lung secretions comprises a housing, a reed disposed in the housing, and an acoustical resistance. The reed produces a low-frequency audio shockwave in a range of about 12 Hz to about 30 Hz when vibrated. The acoustical resistance couples a patient lung cavity to the audio shockwave, thereby vibrating the patient'"'"'s lung cavity to thin lung secretions.

Claims

1. A device for thinning lung secretions, comprising:

a housing encompassing an air mass flowing through said housing when a patient blows air into said housing;

a reed disposed in said housing, said reed producing low-frequency sound in a range of about 12 Hz to about 30 Hz when vibrated by the air mass flowing through said housing over a surface of and past the reed; and

an acoustical resistance that couples the air mass in said housing to an air mass in a lung cavity of the patient to create a virtual air cavity comprising a virtual air mass that is larger than the air mass in said housing, the virtual air cavity assisting said reed to produce the low-frequency sound,

wherein the low-frequency sound vibrates the air mass in the virtual air cavity, thereby vibrating the patient'"'"'s lung cavity to thin lung secretions.

2. The device according to claim 1, wherein said acoustical resistance comprises a filter disposed in said housing.

3. The device according to claim 1, wherein said acoustical resistance comprises a foam plug disposed in said housing.

4. The device according to claim 1, wherein said acoustical resistance comprises a tapered end of said housing that restricts air flow from said housing.

5. The device according to claim 1, wherein said acoustical resistance comprises an end cap disposed on an end of said housing that restricts air flow from said housing.

6. The device according to claim 1, wherein said acoustical resistance comprises the air mass flowing through said housing, and

wherein said housing comprises a volume sufficient to encompass an air mass large enough to produce said acoustical resistance.

7. The device according to claim 1, wherein said acoustical resistance comprises a size of said reed tat provides resistance to air flow within said housing.

8. The device according to claim 1, wherein said device comprises a plurality of acoustical resistances that couple the air mass in said housing to the air mass in the patient'"'"'s lung cavity.

9. The device according to claim 8, wherein said plurality of acoustical resistances comprises a size of said reed and the air mass flowing through said housing.

10. The device according to claim 1, wherein said low-frequency sound comprises a frequency in a range of about 16 Hz to about 20 Hz.

11. The device according to claim 10, wherein said low-frequency sound comprises a frequency of about 18 Hz.

12. The device according to claim 1, wherein said low-frequency sound comprises a frequency in a range of about 20 Hz to about 30 Hz.

13. The device according to claim 12, wherein said low-frequency sound comprises a frequency in a range of about 25 Hz to about 30 Hz.

14. The device according to claim 1, further comprising a mouthpiece coupled to said housing, wherein the patient blows air into said housing through said mouthpiece.

15. The device according to claim 14, wherein said reed is coupled to said housing by being coupled to said mouthpiece which is coupled to said housing.

16. The device according to claim 14, wherein an end of said housing is disposed within said mouthpiece to couple said mouthpiece to said housing, and

wherein said reed is coupled to said housing by having an end of said reed compressed between said housing and said mouthpiece.

17. The device according to claim 16, wherein one of said housing and said mouthpiece comprises a positioning channel that positions said reed within said housing.

18. The device according to claim 1, wherein said housing comprises a first portion having a first cross-sectional area and a second portion having a second cross-sectional area, and

wherein said second cross-sectional area is larger than said first cross-sectional area.

19. The device according to claim 18, wherein said reed comprises a free end, and

wherein said free end vibrates within the second portion of said housing.

20. The device according to claim 1, wherein said housing comprises an inner surface having a groove formed therein, wherein said reed intermittently contacts the inner surface of said housing during vibration of said reed.

21. The device according to claim 20, wherein said housing comprises a top inner surface and a bottom inner surface, and

wherein said groove is disposed in one of the top and bottom inner surfaces.

22. The device according to claim 21, wherein said housing comprises a plurality of grooves disposed in at least one of the top and bottom inner surfaces.

23. The device according to claim 1, wherein said reed comprises a free end, and

wherein said free end comprises a cross-sectional area that is smaller than a cross-sectional area of another portion of said reed.

24. The device according to claim 1, wherein said reed comprises a free end, and

wherein said reed further comprises a weight disposed on the free end of said reed.

25. The device according to claim 24, wherein said weight comprises a free end having a cross-sectional area that is smaller than a cross-sectional area of a portion of said reed.

26. The device according to claim 24, wherein a portion of said weight and said reed comprises a cross-sectional area that is smaller than a cross-sectional area of another portion of said weight and said reed.

27. The device according to claim 24, wherein said weight comprises a first material and said reed comprises a second material, and

wherein a compliance of the first material is in a range of about one-eighth to about one-half of a compliance of the second material.

28. The device according to claim 24, wherein said weight comprises a double portion of said reed.

29. The device according to claim 24, wherein said weight comprises tape coupled to the free end of said reed.

30. The device according to claim 1, further comprising a power makeup device coupled to said housing for creating at least a partial vacuum in said housing.

31. The device according to claim 30, wherein said housing comprises an exit opening, and wherein said power makeup device comprises an air flow past the exit opening of said housing.

32. The device according to claim 1, wherein said housing comprises a first end and a second end, and

wherein said device further comprises a first respirator tube coupled to the first end of said housing to couple said device to a respirator.

33. The device according to claim 32, further comprising a first end cap coupled to the first end of said housing,

wherein said first respirator tube is coupled to said first end cap.

34. The device according to claim 32, wherein said device further comprises a second respirator tube coupled to the second end of said housing to couple said device to the patient.

35. The device according to claim 1, wherein said acoustical resistance couples the air mass in said housing to the air mass in the patient'"'"'s lung cavity by slowing a flow rate of the air mass flowing through said housing.

36. The device according to claim 1, wherein said reed vibrates at a frequency in the range of about 24 Hz to about 60 Hz and produces the low-frequency sound as a sub-harmonic in the range of about 12 Hz to about 30 Hz.

37. The device according to claim 1, further comprising a sample collection carrier that collects a diagnostic sample exhaled from the patient'"'"'s lung cavity.

38. The device according to claim 37, wherein said sample collection carrier comprises an indicator that detects a biological material when contacted by the collected diagnostic sample.

39. The device according to claim 37, wherein said sample collection cater comprises one of an absorbent material of said reed, an absorbent material of a weight on to end of said reed, perforations in said reed, indentations in said reed, an absorbent strip disposed in said device, indentions in said housing, an increase in the surface area of said housing, an absorbent material of said acoustical resistance, and a cup-shaped protrusion in said housing.

40. A method for thinning lung secretions, comprising the steps of:

blowing an air mass through a housing of a lung vibrating device;

vibrating a reed disposed in the housing via air flow over a surface of and past the reed to produce low-frequency sound in a range of about 12 Hz to about 30 Hz; and

providing en acoustical resistance in the housing that slows an air flow rate within the housing to couple the air mass in the housing to an air mass in a lung cavity of a patient'"'"'s lungs, thereby creating a virtual air cavity comprising a virtual air mass that is larger than the air mass in the housing,

wherein the low-frequency sound vibrates the air mass in the virtual air cavity, thereby vibrating the patient'"'"'s lungs to thin lung secretions.

41. The method according to claim 40, wherein the acoustical resistance provided in said providing step comprises one of a filter and a foam plug in the housing.

42. The method according to claim 40, wherein the acoustical resistance provided in said providing step comprises a tapered end of the housing which restricts air flow from the housing.

43. The method according to claim 40, wherein the acoustical resistance provided in said providing step comprises an end cap disposed on an end of the housing that restricts air flow from the housing.

44. The method according to claim 40, wherein the acoustical resistance provided in said providing step comprises a volume of the housing that encompass an air mass large enough to produce the acoustical resistance.

45. The method according to claim 40, wherein the acoustical resistance provided in said providing step comprises a size of the reed which slows the air flow rate within the housing.

46. The method according to claim 40, further comprising the step of preventing the reed from adhering to a top inner surface and a bottom inner surface of the housing while the reed vibrates within the housing.

47. The method according to claim 40, further comprising the step of improving the efficiency of said vibrating step by providing a weight on a free end of the reed.

48. The method according to claim 40, further comprising the step of producing at least a partial vacuum in the housing to assist in said vibrating step.

49. The method according to claim 40, further comprising the step of harvesting a sputum sample from the thinned lung secretions.

50. The method according to claim 49, wherein said step of harvesting a sputum sample comprises collecting sputum expelled from the patient'"'"'s lung cavity.

51. The method according to claim 49, wherein said step of harvesting a sputum sample comprises collecting a diagnostic sample from the patient'"'"'s lung cavity with a sample collection carrier disposed in the device.

52. The method according to claim 51, wherein the sample collection carrier comprises an indicator that detects a biological material when contacted by the collected diagnostic sample.

53. The method according to claim 51, wherein the sample collection crier comprises one of an absorbent material of the reed, an absorbent material of a weight on the end of the reed, perforations in the reed, indentations in the reed, an absorbent strip disposed in the device, indentions in the housing, an increase in the surface area of the housing, an absorbent material of the acoustical resistance, and a cup-shaped protrusion in the housing.

54. The method according to claim 40, wherein said vibrating step comprises vibrating the reed at a frequency in the range of about 24 Hz to about 60 Hz to produce the low-frequency sound as a sub-harmonic in the range of about 12 Hz to about 30 Hz.

55. A device for thinning lung secretions, comprising:

a housing encompassing an air mass flowing through said housing when a patient blows air into said housing;

a reed disposed in said housing, said reed producing low-frequency sound in a range of about 12 Hz to about 24 Hz when vibrated by the air mass flowing through said housing over a surface of and past the reed; and

an acoustical resistance that couples the air mass in said housing to an air mass in a lung cavity of the patient to create a virtual air cavity comprising a virtual air mass that is larger than the air mass in said housing, the virtual air cavity assisting said reed to produce the low-frequency sound,

wherein the low-frequency sound vibrates the air mass in the virtual air cavity, thereby vibrating the patients lung cavity to thin lung secretions, and

wherein said reed vibrates at a frequency in the range of about 24 Hz to about 48 Hz to produce the low-frequency sound as a sub-harmonic in the range of about 12 Hz to about 24 Hz.