Method and system of providing therapeutic gas to a patient to prevent breathing airway collapse

• US 20060005834A1
• Filed: 07/07/2004
• Published: 01/12/2006
• Est. Priority Date: 07/07/2004
• Status: Abandoned Application

• Current Assignee: Acoba LLC
• Original Assignee: Acoba LLC
• Inventors: Aylsworth, Alonzo C., Spector, Lawrence C.
• Application Number:
  US10/886,253
• Publication Number:
  US 20060005834A1
• Time in Patent Office: Days
• US Class Current: 128/204.210
• CPC Class Codes: A61M 16/0066 Blowers or centrifugal pumps
• CPC Class Codes: A61M 16/0069 the speed thereof being controlled by respiratory parameters, e.g. by inhalation
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 16/10 Preparation of respiratory gases or vapours
• CPC Class Codes: A61M 16/204 used for inhalation control
• CPC Class Codes: A61M 2016/0021 with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit

Abstract

A method and system of providing therapeutic gas to a patient to prevent breathing airway collapse during sleep. Some exemplary embodiments may be a method comprising providing a flow of therapeutic gas to a patient during a plurality of inhalations, detecting a flow rate of the therapeutic gas of at least one of the patient'"'"'s nares during a first inhalation of the plurality of inhalations, and increasing the flow of therapeutic gas in a second inhalation of the plurality of inhalations based on an amount the flow rate of therapeutic gas in the first inhalation is less than a set point therapeutic gas flow.

Claims

1. A method comprising:

providing a flow of therapeutic gas to a patient during a plurality of inhalations, the flow of therapeutic gas preventing collapse of the patient'"'"'s breathing airway;

detecting a flow rate of the therapeutic gas of at least one of the patient'"'"'s nares during a first inhalation of the plurality of inhalations; and

increasing the flow of therapeutic gas in a second inhalation of the plurality of inhalations based on an amount the flow rate of therapeutic gas in the first inhalation is less than a set point therapeutic gas flow, the increasing before the occurrence of a partial or full airway collapse.

2. The method as defined in claim 1 further comprising detecting a peak flow rate of the therapeutic gas during the first inhalation, and increasing the therapeutic gas flow in the second inhalation based on the peak flow rate of the first inhalation.

3. The method as defined in claim 1 further comprising increasing the flow of therapeutic gas to compensate for a portion of the amount the flow rate of therapeutic gas is below the set point therapeutic gas flow rate.

4. The method as defined in claim 3 further comprising increasing the flow rate by approximately ten percent of the amount needed to correct the amount the flow rate of therapeutic gas is below the set point therapeutic gas flow rate.

5. The method as defined in claim 3 further comprising increasing the flow of therapeutic gas in the second inhalation being immediately subsequent to the first inhalation.

6. A system comprising:

a blower;

a flow sensor fluidly coupled to the blower, the flow sensor measuring therapeutic gas flow provided by the blower, wherein the blower and flow sensor fluidly couple to at least one naris of a patient, and wherein the therapeutic gas flow prevents collapse of the patient'"'"'s breathing airway; and

a processor electrically coupled to the blower and flow sensor, the processor executing a program that controls the therapeutic gas flow from the blower provided to the patient;

wherein the processor, executing a program, reads therapeutic gas flow measured by the flow sensor during a first inhalation of the patient, and wherein the program increases the speed of the blower in a second inhalation in relation to the speed of the blower during the first inhalation, the increase based on an amount the therapeutic gas flow in the first inhalation is less than a set point therapeutic gas flow, and the increasing before the occurrence of a partial or full airway collapse.

7. The system as defined in claim 6 further comprising:

a motor mechanically coupled to the blower providing rotation of the blower; and

a motor speed control circuit electrically coupled to the motor and the processor;

wherein the processor, executed the program, commands the motor speed control circuit to increase the speed of the motor.

8. The system as defined in claim 6 wherein the processor, executing the program, increases the speed of the blower to compensate for a portion of the amount the therapeutic gas flow in the first inhalation is less than the set point therapeutic gas flow.

9. The system as defined in claim 8 wherein the processor, executing the program, increases the speed of the blower approximately ten percent of the amount needed to correct the amount the therapeutic gas flow is less than the set point therapeutic gas flow.

10. A method comprising:

providing a flow of therapeutic gas to a patient during a plurality of inhalations, the flow of therapeutic gas preventing collapse of the patient'"'"'s breathing airway;

detecting a flow rate of the therapeutic gas of at least one of the patient'"'"'s nares during a first inhalation of the plurality of inhalations; and

decreasing the flow of therapeutic gas in a second inhalation of the plurality of inhalations based on an amount the flow rate of therapeutic gas in the first inhalation is greater than a set point therapeutic gas flow.

11. The method as defined in claim 10 further comprising detecting a peak flow rate of the therapeutic gas during the first inhalation, and decreasing the flow of therapeutic gas in the second inhalation based on the peak flow rate of the first inhalation.

12. The method as defined in claim 10 further comprising decreasing the flow of therapeutic gas to compensate for a portion of an amount the flow rate of therapeutic gas in the first inhalation is above the set point therapeutic gas flow rate.

13. The method as defined in claim 12 further comprising decreasing the flow of therapeutic gas by approximately ten percent of the amount needed to correct the amount the detected flow rate of therapeutic gas in the first inhalation is above the set point therapeutic gas flow rate.

14. The method as defined in claim 10 further comprising decreasing the flow of therapeutic gas in the second inhalation being immediately subsequent to the first inhalation.

15. A system comprising:

a blower;

a flow sensor fluidly coupled to the blower, the flow sensor measuring therapeutic gas flow provided by the blower, wherein the blower and flow sensor fluidly couple to at least one naris of a patient, and wherein the therapeutic gas flow prevents collapse of the patient'"'"'s breathing airway; and

a processor electrically coupled to the blower and flow sensor, the processor executing a program that controls the therapeutic gas flow from the blower provided to the patient;

wherein the processor, executing a program, reads therapeutic gas flow measured by the flow sensor during a first inhalation of the patient, and wherein the program decreases the speed of the blower in a second inhalation in relation to the speed of the blower during the first inhalation, the decrease based on an amount the therapeutic gas flow in the first inhalation is above a set point therapeutic gas flow.

16. The system as defined in claim 15 further comprising:

a motor mechanically coupled to the blower providing rotation of the blower, and

a motor speed control circuit electrically coupled to the motor and the processor;

wherein the processor, executed the program, commands the motor speed control circuit to decrease the speed of the motor.

17. The system as defined in claim 15 wherein the processor, executing the program, decreases the blower speed to compensate for a portion of the amount the therapeutic gas flow in the first inhalation is less than the set point therapeutic gas flow.

18. The system as defined in claim 17 wherein the processor, executing the program, decreases the blower speed approximately ten percent of the amount needed to correct the amount the therapeutic gas flow in the first inhalation is less than the set point therapeutic gas flow.

19. A method comprising:

operating a blower coupled to a motor providing a flow of air at pressures above atmospheric to at least one naris of a patient during a plurality of inhalations of a sleep state of the patient, the flow of air prevents partial or full breathing airway collapse;

measuring an air flow through the at least one naris using an air flow detector, the measuring during a first inhalation of the plurality inhalations; and

increasing the blower speed in a second inhalation of the plurality of inhalations based on an amount the air flow in the first inhalation is less than a set point air flow, the increasing before the occurrence of a partial or full airway collapse.

20. The method as defined in claim 19 further comprising measuring a peak air flow rate during the first inhalation, and increasing the air flow in the second inhalation based on the peak air flow rate of the first inhalation.

21. The method as defined in claim 19 further comprising increasing the blower speed to compensate for a portion of the amount the air flow of the first inhalation is below the set point air flow.

22. The method as defined in claim 21 further comprising increasing the blower speed by approximately ten percent of the amount needed to correct the amount the air flow in the first inhalation is below the set point air flow.

23. The method as defined in claim 21 further comprising at least one selected from the group:

increasing the voltage applied to the motor;

increasing the duty cycle of the voltage waveform applied to the motor;

increasing the frequency of the signal applied to the motor;

or increasing the speed at which direct current voltage are applied windings of the motor.

24. The method as defined in claim 19 further comprising increasing the blower speed in the second inhalation being immediately subsequent to the first inhalation.

25. A computer readable medium containing a program that when executed performs a method comprising:

commanding a blower coupled to a motor to provide a flow of air at pressures above atmospheric to at least one naris of a patient during a plurality of inhalations of a sleep state of the patient, the flow of air prevents partial or full breathing airway collapse;

reading an air flow through the at least one naris using an air flow detector, the reading during a first inhalation of the plurality inhalations; and

commanding an increase in blower speed in a second inhalation of the plurality of inhalations based on an amount the air flow in the first inhalation is less than a set point air flow, the commanding an increase before the occurrence of a partial or fall airway collapse.

26. The computer readable medium as defined in claim 25 wherein the method further comprises determining a peak air flow rate during the first inhalation.

27. The computer readable medium as defined in claim 25 wherein the method further comprises commanding the increase in blower speed to compensate for a portion of the amount the air flow in the first inhalation is below the set point air flow.

28. The computer readable medium as defined in claim 27 wherein the method further comprises commanding the increase in blower speed to be approximately ten percent of the amount needed to correct the amount the air flow in the first inhalation is below the set point air flow.

29. The computer readable medium as defined in claim 27 wherein the method further comprises at least one selected from the group:

commanding an increase in the voltage applied to the motor;

commanding an increase in the duty cycle of the voltage waveform applied to the motor, commanding an increase in the frequency of the signal applied to the motor;

or commanding an increase in the speed at which direct current voltage are applied windings of the motor.

30. A method comprising:

operating a blower coupled to a motor to provide a flow of air at pressures above atmospheric to at least one naris of a patient during a plurality of inhalations, the flow of air prevents partial or fill breathing airway collapse during sleep of the patient;

measuring an air flow through the at least one naris using an air flow detector, the measuring during a first inhalation of the plurality inhalations; and

decreasing the blower speed in a second inhalation of the plurality of inhalations based on an amount the measured air flow in the second inhalation is above a set point air flow.

31. The method as defined in claim 30 further comprising measuring a peak air flow rate during the first inhalation, and decreasing the air flow in the second inhalation based on the peak air flow rate of the first inhalation.

32. The method as defined in claim 30 further comprising decreasing the blower speed to compensate for a portion of the amount the air flow in the first inhalation is above the set point air flow.

33. The method as defined in claim 32 further comprising decreasing the blower speed by approximately ten percent of the amount needed to correct the amount the air flow in the first inhalation is above the set point air flow.

34. The method as defined in claim 32 further comprising at least one selected from the group:

decreasing the voltage applied to the motor;

decreasing the duty cycle of the voltage waveform applied to the motor; and

decreasing the frequency of the signal applied to the motor.

35. The method as defined in claim 30 further comprising decreasing the blower speed in the second inhalation being immediately subsequent to the first inhalation.