Method and system for measuring airflow of nares

• US 7,066,180 B2
• Filed: 07/09/2003
• Issued: 06/27/2006
• Est. Priority Date: 07/09/2003
• Status: Active Grant

• Current Assignee: Air BAK Technologies, LLC, Air Motion Technologies, LLC
• Original Assignee: Air BAK Technologies, LLC
• Inventors: Aylsworth, Alonzo C., Spector, Lawrence C.
• Primary Examiner(s): Lewis, Aaron J.
• Application Number:
  US10/616,042
• Publication Number:
  US 20050005942A1
• Time in Patent Office: 1,084 Days
• Field of Search: 128/203.22, 128/204.23, 128/204.26, 128/206.11, 128/207.18, 600/532, 600/535, 600/537, 600/538
• US Class Current: 128/207.18
• CPC Class Codes: A61B 5/085 Measuring impedance of respiratory organs or lung elasticity
• CPC Class Codes: A61B 5/087 Measuring breath flow
• CPC Class Codes: A61B 5/097 Devices for facilitating collection of breath or for directing breath into or through measuring devices
• CPC Class Codes: A61B 5/411 Detecting or monitoring allergy or intolerance reactions to an allergenic agent or substance
• CPC Class Codes: A61M 16/0666 Nasal cannulas or tubing devices for improving normal breathing through the nose A61F5/08; nose filters A62B23/06; outside holding devices A61M25/02
• CPC Class Codes: A61M 16/0858 Pressure sampling ports

Abstract

A method and system for measuring airflow through nares. One exemplary embodiment comprises: measuring an attribute of an airflow through a first naris; measuring an attribute of an airflow through a second naris; wherein measuring the attribute of the airflow through the first naris is accomplished without blocking the second naris; and wherein measuring the attribute of the airflow through the second naris is accomplished without blocking the first naris.

Claims

1. A method comprising:

measuring at least a portion of an airflow of a first naris through a first sensing tube, the measuring creates a first measured airflow; and

measuring at least a portion of an airflow of a second naris through a second sensing tube fluidly independent of the first sensing tube, the measuring creates a second measured airflow;

wherein measuring at least a portion of the airflow of the first naris is accomplished without blocking the second naris; and

wherein measuring at least a portion of the airflow of the second naris is accomplished without blocking the first naris.

2. The method as defined in claim 1 wherein the measuring take place during inhalation.

3. The method as defined in claim 1 wherein the measuring takes place during exhalation.

4. The method as defined in claim 1 wherein measuring at least a portion of the airflow of the first naris further comprises measuring at a known distance within the first naris.

5. The method as defined in claim 1 wherein measuring at least a portion of the airflow of the first naris further comprises measuring the airflow through the first sensing being part of tube of a bifurcated nasal cannula worn by a patient.

6. The method as defined in claim 1 further comprising determining a difference in the first and second measured airflows.

7. The method as defined in claim 1 wherein the measuring takes place substantially simultaneously.

8. The method as defined in claim 1 further comprising measuring at least a portion of an oral airflow.

9. The method as defined in claim 8 wherein the measuring further comprises measuring substantially simultaneously.

10. A method comprising:

measuring a pressure associated with an airflow through a first naris, the measuring by way of a first sensing tube; and

measuring a pressure associated with an airflow through a second naris, the measuring the pressure associated with airflow through the second naris by way of a second sensing tube, the first and second sensing tubes fluidly independent;

wherein measuring the pressure associated with the airflow through the first naris is accomplished without blocking the second naris; and

wherein measuring the pressure associated with the airflow through the second naris is accomplished without blocking the first naris.

11. The method as defined in claim 10 wherein the measuring further comprises measuring a pressure proximate to an opening of each of the first and second naris.

12. The method as defined in claim 10 further comprising determining a difference in the pressure measured between the first and second naris.

13. The method as defined in claim 10 wherein the measuring takes place during inhalation.

14. The method as defined in claim 10 wherein measuring the pressure associated with the airflow through the first naris further comprises measuring a pressure in the first sensing tube being part of a bifurcated nasal cannula.

15. A nasal function test device comprising:

a first air mass flow sensor configured to fluidly couple to a first naris by way of a first sensing tube, the first air mass flow sensor detects airflow of the first naris that flows through the first sensing tube to create a first measured flow signal;

a second air mass flow sensor configured to fluidly couple to a second naris by way of a second, fluidly independent sensing tube, the second air mass flow sensor detects airflow of the second naris that flows through the second sensing tube to create a second measured flow signal; and

a processor electrically coupled to the first and second airflow sensors, and wherein the processor is programmed to substantially simultaneously read the first and second measured flow signals.

16. The nasal function test device as defined in claim 15 further comprising:

a third air mass flow sensor coupled to the processor, the third air mass flow sensor detects at least a portion an oral airflow to create a measured oral flow signal; and

wherein the processor is programmed to substantially simultaneously read the first measured flow signal, the second measured flow signal, and the measured oral flow signal.

17. The nasal function test device as defined in claim 15 wherein the processor is further programmed to determine a difference between the first and second measured flow signals.

18. The nasal function test device as defined in claim 15 further comprising a display device coupled to the processor and wherein the processor displays an indication of the first and second measured flow signals on the display device.

19. The nasal function test device as defined in claim 18 wherein the display device displays a graph of the first and second measured flow signals as a function of time.

20. The nasal function test device as defined in claim 18 wherein the display device displays a difference between the first and second measured flow signals.

21. The nasal function test device as defined in claim 15 further comprising:

a non-volatile memory coupled to the processor; and

wherein the processor is programmed to store the first and second measured flow signals as a first set of data in the non-volatile memory, and wherein the processor is further programmed to analyze differences between the first set of data in the non-volatile memory and a second set of data taken at a different time.

22. The nasal function test device as defined in claim 15 further comprising:

a bifurcated nasal cannula comprising the first sensing tube and the second sensing tube.

23. The nasal function test device as defined in claim 22 wherein the first sensing tube has an opening positioned within the airflow of the first naris.

24. The nasal function test device as defined in claim 23 wherein the opening of the first sensing tube is proximate to an entrance to the first naris.

25. The nasal function test device as defined in claim 23 wherein the opening of the first sensing tube is a measurable distance within the first naris.

26. The nasal function test device as defined in claim 15 further comprising third air mass flow sensor fluidly coupled to the first air mass flow sensor, and wherein the first air mass flow sensor produces the measured flow signal during inhalation, and wherein the third air mass flow sensor produces a measured flow signal during exhalation.

27. A nasal function test device comprising:

a first airflow sensor that detects at least a portion of an airflow through a first naris to create a first measured flow signal;

a second airflow sensor that detects at least a portion of an airflow through a second naris to create a second measured flow signal; and

a processor electrically coupled to the first and second airflow sensors, and wherein the processor is programmed to substantially simultaneously read the first and second measured flow signals;

wherein the processor is further programmed to determine an area under a curve produced by changes in the first measured flow signal during at least one of inhalation or exhalation, the area being a first breathing score;

wherein the processor is further programmed to determine an area under a curve produced by changes in the second measured flow signal during at least one of inhalation or exhalation, the area being a second breathing score; and

wherein the processor determines a difference between the first and second breathing score.

28. A system comprising:

a differential pressure measurement device having first and second ports, wherein the first port is configured to be fluidly coupled to a first nostril of a patient, and wherein the second port is configured to be fluidly coupled to a second nostril of a patient;

an indicator coupled to the differential pressure measurement device, and wherein the indicator displays an indication of a difference in air pressure associated with airflow in each of the first and second nostrils.

29. The system as defined in claim 28 wherein the indicator further comprises a display device that provides a plot of the pressure reading taken by the differential pressure device as a function of time.

30. A system comprising:

a differential pressure measurement device having first and second ports, wherein the first port is configured to be fluidly coupled to a first nostril of a patient, and wherein the second port is configured to be fluidly coupled to a second nostril of a patient;

an indicator coupled to the differential pressure measurement device, and wherein the indicator displays an indication of a difference in air pressure associated with airflow in each of the first and second nostrils;

a nasal cannula having a first and second sensing lines, the first and second sensing lines not in fluid communication; and

wherein the first sensing line couples to the first port, and wherein the second sensing line couples to the second port.

31. A method comprising:

measuring a relative airflow as between the nostrils of a patient with the patient'"'"'s head held in a first position and at a first respiratory rate;

measuring a relative airflow as between the nostrils of the patient with the patient'"'"'s head held in a second position and at a second respiratory rate;

wherein the first and second position are one each selected from the group of;

head upright, head tilted left, head tilted left, head facing down or head facing up; and

wherein the first and second respiratory rate are one each selected from the group of;

tidal breathing or maximum inspiration.

32. The method as defined in claim 31 further comprising determining whether there are differences in measured relative airflow between the first position and the second position.

33. The method as defined in claim 31 wherein measuring the relative airflow as between the nostrils of a patient with the patient'"'"'s head held in a first position further comprises measuring without blocking either nostril.

34. The method as defined in claim 33 wherein measuring the relative airflow as between the nostrils of the patient with the patient'"'"'s head held in a second position further comprises measuring without blocking either nostril.

35. The method as define in claim 31 further comprising:

measuring oral airflow with the patient'"'"'s head in the first position; and

measuring oral airflow with the patient'"'"'s head in the second position.

36. A nasal function test device comprising:

a first pressure sensor configured to fluidly couple to a first naris by way of a first sensing tube, the first pressure sensor detects a pressure associated with an airflow through the first naris to create a first measured signal;

a second pressure sensor configured to fluidly couple to a second naris by way of a second sensing tube, the second sensing tube fluidly independent of the first sensing tube, and the second pressure sensor detects a pressure associated with an airflow through the second naris to create a second measured signal; and

a processor electrically coupled to the first and second pressure sensors, and wherein the processor is programmed to substantially simultaneously read the first and second measured signals.

37. The nasal function test device as defined in claim 36 wherein the processor is further programmed to determine a difference between the first and second measured signals.

38. The nasal function test device as defined in claim 36 further comprising a display device coupled to the processor, and wherein the processor displays an indication of the first and second measured signals on the display device.

39. The nasal function test device as defined in claim 38 wherein the display device displays a graph of the first and second measured signals as a function of time.

40. The nasal function test device as defined in claim 38 wherein the display device displays a difference between the first and second measured signals.

41. The nasal function test device as defined in claim 36 further comprising:

a non-volatile memory coupled to the processor; and

wherein the processor is programmed to store the first and second measured signals as a first set of data in the non-volatile memory, and wherein the processor is further programmed to analyze differences between the first set of data in the non-volatile memory and a second set of data taken at a different time.

42. The nasal function test device as defined in claim 36 further comprising:

a bifurcated nasal cannula comprising the first sensing tube and the second sensing tube.

43. A method comprising:

measuring at least a portion of an airflow of a first naris through a first sensing tube, the measuring creates a first measured airflow; and

substantially simultaneously

measuring at least a portion of an airflow of a second naris through a second, fluidly independent sensing tube, the measuring creates a second measured airflow.

44. The method as defined in claim 43 where measuring further comprises measuring at least a portion of the airflow with a respective mass flow sensor.

45. The method as defined in claim 43 wherein the measuring takes place during inhalation.

46. The method as defined in 44 wherein measuring further comprises measuring at least a portion of the airflow with the respective mass flow sensor fluidly coupled to the respective naris by a sensing tube of a bifurcated nasal cannula.