Nebulizer that is activated by negative inspiratory pressure

• US 8,671,934 B2
• Filed: 01/19/2012
• Issued: 03/18/2014
• Est. Priority Date: 01/20/2011
• Status: Active Grant

• Current Assignee: Pneumoflex Systems, LLC
• Original Assignee: Pneumoflex Systems, LLC
• Inventors: Addington, W. Robert, Miller, Stuart P., Stephens, Robert E.
• Primary Examiner(s): Ho, Tan-Uyen T.
• Assistant Examiner(s): WARDAS, MARK A
• Application Number:
  US13/353,611
• Publication Number:
  US 20120186582A1
• Time in Patent Office: 789 Days
• Field of Search: 128/201.21, 128/203.12, 128/203.11, 128/200.18, 128/200.14, 128/202.28, 128/202.25, 128/200.21, 128/204.11, 128/204.14, 128/204.18, 128/204.23, 239/338
• US Class Current: 128/200.21
• CPC Class Codes: A61B 5/0823 Detecting or evaluating cough events
• CPC Class Codes: A61B 5/087 Measuring breath flow
• CPC Class Codes: A61B 5/4839 combined with drug delivery
• CPC Class Codes: A61B 5/7282 Event detection, e.g. detecting unique waveforms indicative of a medical condition A61B5/4094, A61B5/4818, A61B5/349, A61B5/0823 take precedence
• CPC Class Codes: A61J 17/001 Baby-comforters
• CPC Class Codes: A61J 7/0053 Syringes, pipettes or oral dispensers
• CPC Class Codes: A61M 11/002 by flow deviation causing inertial separation of transported particles
• CPC Class Codes: A61M 11/02 operated by air or other gas pressure applied to the liquid or other product to be sprayed or atomised sprayers for horticulture A01G, A01H; killing insects A01M; air humidifying by nozzles F24F6/14, F24F6/18; cooling by spraying F28B, F28C
• CPC Class Codes: A61M 11/06 of the injector type
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0057 Pumps therefor
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 16/14 by mixing different fluids, one of them being in a liquid phase
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2205/13 with means for the detection of operative contact with patient, e.g. lip sensor
• CPC Class Codes: A61M 2205/8225 using incorporated gas cartridges for the driving gas

Abstract

A nebulizer includes a body, an air channel section and medication reservoir. An air line extends through the air channel section. A venturi nozzle is configured to form at its end a low pressure mixing chamber. A primary suction line extends from the medication reservoir to the low pressure mixing chamber through which medication is drawn upward into the low pressure mixing chamber and mixed with air from the venturi nozzle and nebulized for discharge through a nebulizer outlet. The venturi nozzle, low pressure mixing chamber and air channel section are configured such that at standard temperature and pressure (STP) a differential pressure results in no medication that is drawn upward through the primary suction line for nebulization and discharged the through the nebulizer outlet until a negative inspiratory pressure is created from inhalation by a user.

Claims

1. A nebulizer, comprising:

a body comprising an air channel section, a medication reservoir and a nebulizer outlet configured to be received within an oral cavity of a patient;

an air line having an inlet at one end and extending through the air channel section and having a venturi nozzle at an outlet end configured to form a low pressure mixing chamber, where the air line provides continuous pressure between the input end and the outlet end;

a primary suction line extending from the medication reservoir to the low pressure mixing chamber through which medication is drawn upward and mixed with air passing through the venturi nozzle and nebulized for discharge through the nebulizer outlet;

wherein the venturi nozzle, primary suction line, low pressure mixing chamber and air channel section are configured such that at standard temperature and pressure (STP), a differential pressure results in no medication being drawn upward through the primary suction line for nebulization and discharge through the nebulizer outlet until a predetermined negative inspiratory pressure is created from inhalation by a user, and upon user inhalation that creates the negative inspiratory pressure, air flow begins through the venturi nozzle and medication is drawn upward through the primary suction line and nebulized by the air flowing through the venturi nozzle to be discharged through the nebulizer outlet.

2. The nebulizer according to claim 1, wherein the air line, the venturi nozzle and the nebulizer are horizontally oriented when in use.

3. The nebulizer according to claim 1, wherein nebulization begins at a negative inspiratory pressure of from −

3 cmH₂O to −

52 cmH₂O.

4. The nebulizer according to claim 1, wherein the venturi nozzle is located to within a patient'"'"'s oral cavity when the nebulizer is in use.

5. The nebulizer according to claim 1, and further comprising a rainfall chamber into which the venturi nozzle and low pressure mixing chamber are positioned.

6. The nebulizer according to claim 5, and further comprising a diffuser upon which the nebulized medication and air exiting the venturi nozzle and low pressure mixing chamber impacts to aid nebulization.

7. The nebulizer according to claim 5, and further comprising a secondary suction line within the rainfall chamber that draws nebulized medication that drops down before discharge through the nebulizer outlet.

8. The nebulizer according to claim 1, and further comprising an air flow sensor positioned within the air channel section and configured to generate signals indicative of air flow generated by a patient'"'"'s involuntary cough event occurring at nebulization.

9. The nebulizer according to claim 1, and further comprising a processor interfaced with the air flow sensor and configured to evaluate the involuntary cough event.

10. The nebulizer according to claim 1, wherein said nebulizer outlet is configured as an infant pacifier.

11. The nebulizer according to claim 10, wherein the nebulizer outlet is configured as an infant lollipop pacifier.

12. The nebulizer according to claim 1, and further comprising a nebulizer suction member enclosing the body and configured as an infant pacifier.

13. A nebulizer, comprising:

a body comprising an air channel section, a medication reservoir and a nebulizer outlet configured to be received within an oral cavity of a patient;

an air line having an inlet at one end and extending through the air channel section and having a venturi nozzle at an outlet end configured to form a low pressure mixing chamber, where the air line provides continuous pressure between the input end and the outlet end;

a primary suction line extending from the medication reservoir to the low pressure mixing chamber through which medication is drawn upward and mixed with air passing through the venturi nozzle and nebulized for discharge through the nebulizer outlet;

wherein the venturi nozzle, primary suction line, low pressure mixing chamber and air channel section are configured such that at standard temperature and pressure (STP), a differential pressure results in no medication being drawn upward through the primary suction line for nebulization and discharge through the nebulizer outlet until a predetermined negative inspiratory pressure is created from inhalation by a user, and upon user inhalation that creates the negative inspiratory pressure, air flow begins through the venturi nozzle and medication is drawn upward through the primary suction line to be nebulized by the air flowing through the venturi nozzle and discharged through the nebulizer outlet, and further comprising an air flow sensor positioned within the air channel section and configured to generate signals indicative of air flow generated by a patient'"'"'s involuntary cough event occurring at nebulization; and

a processor configured to receive signals from the air flow sensor and to evaluate the involuntary cough event.

14. The nebulizer according to claim 13, wherein the air line, the venturi nozzle and the nebulizer are horizontally oriented when in use.

15. The nebulizer according to claim 13, wherein nebulization begins at a negative inspiratory pressure of from −

3 cmH₂O to −

52 cmH₂O.

16. The nebulizer according to claim 13, wherein the venturi nozzle is located to within a patient'"'"'s oral cavity when the nebulizer is in use.

17. The nebulizer according to claim 13, and further comprising a rainfall chamber into which the venturi nozzle and low pressure mixing chamber are positioned.

18. The nebulizer according to claim 17, and further comprising a diffuser upon which the nebulized medication and air exiting the venturi nozzle and low pressure mixing chamber impacts to aid nebulization.

19. The nebulizer according to claim 17, and further comprising a secondary suction line within the rainfall chamber that draws nebulized medication that drops down before discharge through the nebulizer outlet.

20. The nebulizer according to claim 13, wherein said nebulizer outlet is configured as an infant pacifier.

21. The nebulizer according to claim 20, wherein the nebulizer outlet is configured as an infant lollipop pacifier.

22. The nebulizer according to claim 13, and further comprising a nebulizer suction member enclosing the body and configured as an infant pacifier.