In a respiratory apparatus for treatment of sleep apnea and other disorders associated with an obstruction of a patient's airway and which uses an airflow signal, an obstruction index is generated which detects the flattening of the inspiratory portion of the airflow. The obstruction index is used t
In a respiratory apparatus for treatment of sleep apnea and other disorders associated with an obstruction of a patient's airway and which uses an airflow signal, an obstruction index is generated which detects the flattening of the inspiratory portion of the airflow. The obstruction index is used to differentiate normal and obstructed breathing. The obstruction index is based upon different weighting factors applied to sections of the airflow signal thereby improving sensitivity to various types of respiration obstructions.
대표청구항▼
1. An apparatus for detecting an upper respiratory obstruction indicative of sleep apnea comprising: a sensor configured to sense a flow of gas breathed by a patient and to generate a flow signal indicative of the gas flow; andan obstruction detector including a processor coupled to said sensor, sai
1. An apparatus for detecting an upper respiratory obstruction indicative of sleep apnea comprising: a sensor configured to sense a flow of gas breathed by a patient and to generate a flow signal indicative of the gas flow; andan obstruction detector including a processor coupled to said sensor, said obstruction detector configured to evaluate portions of said flow signal and to generate an obstruction signal to indicate an obstruction when the flow signal represents an inspiratory pattern having a lobe representative of respiratory obstruction. 2. The apparatus of claim 1 wherein the obstruction detector is further configured to generate an obstruction signal to indicate an obstruction when the flow signal represents an inspiratory pattern comprising two lobes separated by an approximately flat region. 3. The apparatus of claim 2 further comprising: a gas source configured to selectively provide breathable gas to the patient at a pressure; and a controller including the processor, the controller configured to control a modification of the pressure of the gas source in response to the obstruction signal. 4. The apparatus of claim 3 wherein the processor of the obstruction detector is configured to assign different weights to discrete values of the portions based on amplitude of each discrete value. 5. The apparatus of claim 3 wherein the processor of the obstruction detector is configured to assign different weights to discrete values of the portions based on time position of each discrete value. 6. The apparatus of claim 3 wherein the processor of the obstruction detector is configured to generate the obstruction signal by comparing a threshold to a calculated ratio of a mean of a weighted mid-portion of an inspiratory flow signal and a mean of the inspiratory flow signal. 7. The apparatus of claim 1 wherein the obstruction detector is further configured to generate an obstruction signal to indicate an obstruction when the flow signal represents an inspiratory pattern comprising an abnormally wide initial lobe followed by a slow decay. 8. The apparatus of claim 7 further comprising: a gas source configured to selectively provide breathable gas to the patient at a pressure; and a controller including the processor, the controller configured to control a modification of the pressure of the gas source in response to the obstruction signal. 9. The apparatus of claim 8 wherein the processor of the obstruction detector is configured to assign different weights to discrete values of the portions based on amplitude of each discrete value. 10. The apparatus of claim 8 wherein the processor of the obstruction detector is configured to assign different weights to discrete values of the portions based on time position of each discrete value. 11. The apparatus of claim 8 wherein the processor of the obstruction detector is configured to generate the obstruction signal by comparing a threshold to a calculated ratio of a mean of a weighted mid-portion of an inspiratory flow signal and a mean of the inspiratory air signal. 12. The apparatus of claim 1 wherein the obstruction detector is configured to generate an obstruction signal upon detection of an inspiratory pattern having two lobes separated by an approximately flat region and to generate an obstruction signal upon detection of an inspiratory pattern having an abnormally wide initial lobe followed by a slow decay. 13. The apparatus of claim 12 further comprising: a gas source configured to selectively provide breathable gas to the patient at a pressure; and a controller including the processor, the controller configured to control a modification of the pressure of the gas source in response to the obstruction signals. 14. The apparatus of claim 13 wherein the processor of the obstruction detector is configured to assign different weights to discrete values of the portions based on amplitude of each discrete value. 15. The apparatus of claim 13 wherein the processor of the obstruction detector is configured to assign different weights to discrete values of the portions based on time position of each discrete value. 16. The apparatus of claim 13 wherein the processor of the obstruction detector is configured to generate the obstruction signal by comparing a threshold to a calculated ratio of a mean of a weighted mid-portion of an inspiratory flow signal and a mean of the inspiratory air signal. 17. The apparatus of claim 1 wherein the generation of the obstruction signal indicates an obstruction representing an inspiratory pattern having an initial lobe followed by a flattened section. 18. The apparatus of claim 1 wherein the generation of the obstruction signal indicates an obstruction representing an inspiratory pattern having an initial lobe followed by a decaying section. 19. A method for detecting an upper respiratory obstruction indicative of sleep apnea comprising: sensing with a sensor a flow of gas breathed by a patient and generating a flow signal indicative of the gas flow; anddetecting an obstruction event with a processor coupled to said sensor, the processor configured to control an evaluation of portions of the flow signal and to generate an obstruction signal to indicate an obstruction event when the flow signal represents an inspiratory pattern having a lobe representative of respiratory obstruction. 20. The method of claim 19 further comprising the step of detecting an obstruction event when the flow signal represents an inspiratory pattern comprising two lobes separated by an approximately flat region. 21. The method of claim 20 further comprising providing a breathable gas at a pressure from a flow generator, and controlling with the processor a modification of the pressure of the breathable gas in response to the obstruction signal. 22. The method of claim 21 further comprising assigning, with the processor, different weights to discrete values of the portions based on amplitude of each discrete value. 23. The method of claim 21 further comprising assigning, with processor, different weights to discrete values of the portions based on time position of each discrete value. 24. The method of claim 21 further comprising comparing, with the processor, a threshold to a calculated ratio of a mean of a weighted mid-portion of an inspiratory flow signal and a mean of an inspiratory flow signal to generate the obstruction signal. 25. The method of claim 19 further comprising the step of detecting an obstruction event when the flow signal represents an inspiratory pattern comprising an abnormally wide initial lobe followed by a slow decay. 26. The method of claim 25 further comprising: providing breathable gas to the patient at a pressure with a flow generator; and controlling, with the processor, a modification of the pressure of the breathable gas in response to the obstruction signal. 27. The method of claim 26 further comprising assigning, with the processor, different weights to discrete values of the portions based on amplitude of each discrete value. 28. The method of claim 26 further comprising assigning, with the processor, different weights to discrete values of the portions based on time position of each discrete value. 29. The method of claim 26 further comprising comparing, with the processor, a threshold to a calculated ratio of a mean of a weighted mid-portion of an inspiratory flow signal and a mean of an inspiratory flow signal to generate the obstruction signal. 30. The method of claim 19 wherein an obstruction signal is generated upon detection of an inspiratory pattern having two lobes separated by an approximately flat region and an obstruction signal is generated upon detection of an inspiratory pattern having an abnormally wide initial lobe followed by a slow decay. 31. The method of claim 30 further comprising delivering a flow of breathable gas at a pressure by a flow generator; and controlling, with the processor, a modification of the pressure of the breathable gas in response to the obstruction signals. 32. The method of claim 31 further comprising, assigning, with the processor, different weights to discrete values of the portions based on amplitude of each discrete value. 33. The method of claim 31 further comprising, assigning, with the processor, different weights to discrete values of the portions based on time position of each discrete value. 34. The method of claim 31 further comprising comparing, with the processor, a threshold to a calculated ratio of a mean of a weighted mid-portion of an inspiratory flow signal and a mean of the inspiratory flow signal to generate the obstruction signal. 35. The method of claim 19 wherein the generation of the obstruction signal indicates an obstruction representing an inspiratory pattern having an initial lobe followed by a flattened section. 36. The method of claim 19 wherein the generation of the obstruction signal indicates an obstruction representing an inspiratory pattern having an initial lobe followed by a decaying section. 37. An apparatus for monitoring or treating a patient having sleep disorder, said apparatus comprising: a flow sensor to generate a flow signal indicative of the patient's respiration; andan obstruction detector coupled to said flow sensor arranged to generate an obstruction signal when said flow signal has, during an inspiratory portion of a breathing cycle, two high positive lobes and a relatively flat zone between the lobes. 38. A method for determining the presence of an obstruction of the airway of a patient, the method comprising: accessing data samples of a signal generated by a flow sensor, the data samples representing airflow of a patient's airway; andgenerating an obstruction signal in an obstruction detector coupled to said flow sensor when at least one breathing cycle in the sampled flow signal has, during an inspiratory portion, two high positive lobes and a relatively flat zone between the lobes. 39. An apparatus for monitoring or treating a patient having sleep disorder, said apparatus comprising: a flow sensor to generate a flow signal indicative of the patient's respiration; andan obstruction detector coupled to said flow sensor arranged to generate an obstruction signal when said flow signal has, during an inspiratory portion of a breathing cycle, an abnormally wide initial positive lobe preceding a relatively flat portion. 40. A method for determining the presence of an obstruction of the airway of a patient, the method comprising: accessing data samples of a signal generated by a flow sensor, the signal representing airflow of a patient's airway;generating an obstruction signal in an obstruction detector coupled to said flow sensor when at least one breathing cycle in the sampled flow signal has, during an inspiratory portion, an abnormally wide initial positive lobe preceding a relatively flat portion.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (64)
Series Frdrick (Ste-Foy CAX) Marc Isabelle (Ste-Foy CAX), Accuracy of breath-by-breath analysis of flow volume loop in identifying flow-limited breathing cycles in patients.
Remmers John Edward (Calgary CAX) Feroah Thomas Richard (Calgary CAX), Auto CPAP system and method for preventing patient disturbance using airflow profile information.
Sullivan Colin E. (Sidney AUX) Lynch Christopher (Sidney AUX), Device and method for monitoring breathing during sleep, control of CPAP treatment, and preventing of apnea.
Colin E. Sullivan AU; Christopher Lynch AU, Device and method for nonclinical monitoring of breathing during sleep, control of CPAP treatment and preventing apnea.
Cotner Ronald L. (Derry NH) Parise Gerald J. (Bedford NH) Asacker Thomas E. (Exeter NH) Sadrnoori Bijan (N. Andover MA) Muller Robert A. (Manchester NH), Device and method for the treatment of sleep apnea syndrome.
Gruenke Roger A. (Overland Park KS) Trimble Russell L. (Overland Park KS), Inspiratory airway pressure system using constant pressure and measuring flow signals to determine airway patency.
Sanders Mark H. (Pittsburgh PA) Zdrojkowski Ronald J. (Pittsburgh PA), Method and apparatus for maintaining airway patency to treat sleep apnea and other disorders.
David M. Rapoport ; Robert G. Norman, Method and apparatus for optimizing the continuous positive airway pressure for treating obstructive sleep apnea.
Rapoport David M. (New York NY) Norman Robert G. (New Windsor NY), Method and apparatus for optimizing the continuous positive airway pressure for treating obstructive sleep apnea.
Rapoport David M. (New York NY) Norman Robert G. (New Windsor NY) Gruenke Roger A. (Overland Park KS), Method and apparatus for optimizing the continuous positive airway pressure for treating obstructive sleep apnea.
Rapoport David M. ; Norman Robert G., Method and apparatus for optimizing the continuous positive airway pressure for treating obstructive sleep apnea.
Rapoport David M. ; Norman Robert G. ; Gruenke Roger A., Method and apparatus for optimizing the continuous positive airway pressure for treating obstructive sleep apnea.
Estes Mark C. (Irwin PA) Fiore John H. (Irwin PA), Method and apparatus for providing proportional positive airway pressure to treat sleep disordered breathing.
Johansson Eric T. (Dublin CA) Ritson Carl (San Jose CA) Rubsamen Reid M. (Berkeley CA), Method and apparatus for releasing a controlled amount of aerosol medication over a selectable time interval.
Johansson Eric T. (Dublin CA) Ritson Carl (San Jose CA) Rubsamen Reid M. (Berkeley CA), Method and apparatus for releasing a controlled amount of aerosol medication over a selectable time interval.
Johansson Eric T. ; Ritson Carl ; Rubsamen Reid M., Method and apparatus for releasing a controlled amount of aerosol medication over a selectable time interval.
Rapoport David M. (New York NY) Norman Robert G. (New Windsor NY), Method for optimizing the continuous positive airway pressure for treating obstructive sleep apnea.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.