Determination of mask fitting pressure and correct mask fit
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61M-016/00
A61M-016/06
A62B-027/00
출원번호
US-0488130
(2006-07-18)
등록번호
US-9707361
(2017-07-18)
우선권정보
AU-PP7831 (1998-12-21)
발명자
/ 주소
Brewer, Gregory Newton
Colla, Gregory Alan
Farrugia, Steven Paul
Somaiya, Chinmayee
출원인 / 주소
ResMed Limited
대리인 / 주소
Nixon & Vanderhye P.C.
인용정보
피인용 횟수 :
0인용 특허 :
29
초록▼
CPAP treatment apparatus (10), as one form of positive pressure ventilatory assistance, is disclosed. A turbine/blower (14), operated by a mechanically coupled electrical motor (16), receives air or breathable gas at an inlet (18) thereof, and supplies the breathable gas at a delivery pressure to a
CPAP treatment apparatus (10), as one form of positive pressure ventilatory assistance, is disclosed. A turbine/blower (14), operated by a mechanically coupled electrical motor (16), receives air or breathable gas at an inlet (18) thereof, and supplies the breathable gas at a delivery pressure to a delivery tube/hose (20) having connection at the other end thereof with a nose mask (12). A microcontroller (38) has an operational “Mask-Fit” mode. An initial constant pressure level is applied by the blower (14) to the mask (12). If the functional mode is a Manual mode, then the mask-fit test pressure is the current ‘set’ pressure. If the functional mode is the Automatic Titration mode, the mask-fit test pressure is the 95th percentile pressure of the previous session, otherwise it is the base treatment pressure, e.g. 10-12 cm H2O. This constant pressure is applied for a period of time, typically 1-3 minutes. The microcontroller (38) continuously determines mask leak as the value, fLEAK, from a flow sensor (32), comparing this to a threshold, and providing the patient with a visual indication of degree of leak. In this way the patient can manipulate the mask to ensure correct fitting as indicated by the appropriate message or indication.
대표청구항▼
1. A method for determining a mask-fit test pressure to be applied to a wearer's mask by a ventilatory assistance or CPAP apparatus, the method comprising: determining, via at least one processor, a percentile pressure from a previous pressure provided in a ventilatory assistance or CPAP session; an
1. A method for determining a mask-fit test pressure to be applied to a wearer's mask by a ventilatory assistance or CPAP apparatus, the method comprising: determining, via at least one processor, a percentile pressure from a previous pressure provided in a ventilatory assistance or CPAP session; andsetting said mask-fit test pressure to the percentile pressure. 2. The method of claim 1, wherein said percentile pressure is chosen from a 75th-95th percentile pressure range. 3. The method of claim 2, further comprising determining a base pressure to be said mask-fit test pressure if there is no previous pressure available. 4. The method of claim 3, wherein said base pressure is in a 10-12 cm H2O range. 5. The method of claim 4, further comprising: determining that the previous pressure is available if the ventilatory assistance or CPAP session occurred for greater than a predetermined time interval. 6. The method of claim 5, wherein said predetermined time interval is three hours. 7. The method of claim 1, wherein the mask-fit test pressure is a pressure adapted to test whether the mask leaks when fitted to a wearer. 8. A method for assessing correct fitting of a mask delivering ventilatory assistance or CPAP therapy, provided by a ventilatory assistance or CPAP apparatus, to a wearer of the mask, the method comprising: determining, via at least one processor, a percentile pressure from a previous pressure provided in a ventilatory assistance or CPAP session;applying the percentile pressure as a test pressure;determining, via the at least one processor, leak flow from said mask at the test pressure; anddisplaying or otherwise indicating a magnitude of the leak flow as an indication of correct mask fitting. 9. The method of claim 8, wherein said leak flow is quantized to represent a degree of leak. 10. The method of claim 9, further comprising: comparing said leak flow against a threshold value representing zero degree of leak; anddetermining that there is correct mask fitting if the threshold is not exceeded. 11. The method of claim 9, further comprising determining a base pressure to be applied as said test pressure if there is no previous pressure available. 12. The method of claim 11, wherein said percentile pressure is chosen from a 75th-95th percentile pressure range. 13. The method of claim 12, wherein said base pressure is in a 10-12 cm H2O range. 14. The method of claim 12, further comprising determining that the previous pressure is available if the ventilatory assistance or CPAP session occurred for greater than a predetermined time interval. 15. The method of claim 14, wherein said predetermined time interval is three hours. 16. The method of claim 8, wherein the test pressure is a pressure adapted to test whether the mask leaks when fitted to the wearer. 17. A method for determining a mask-fit positive test pressure to be applied to a wearer's mask by a ventilatory assistance or CPAP apparatus, the method comprising: determining, via at least one processor, a percentile pressure from a previous pressure in a ventilatory assistance or CPAP session; andsetting said mask-fit positive test pressure to the percentile pressure. 18. The method of claim 17, wherein said percentile pressure is chosen from a 75th-95th percentile pressure range. 19. The method of claim 17, comprising determining a base pressure to be said mask-fit positive test pressure if there is no previous pressure available. 20. The method claim 19, wherein said base pressure is in a 10-12 cm H2O range. 21. The method of claim 17, further comprising determining that the previous pressure is available if the ventilatory assistance or CPAP session occurred for greater than a predetermined time interval. 22. The method of claim 21, wherein said predetermined time interval is three hours. 23. The method of claim 17, wherein the mask-fit positive test pressure is a pressure adapted to test whether the mask leaks when fitted to a wearer. 24. A method for assessing correct fitting of a mask delivering ventilatory assistance or CPAP therapy, provided by ventilatory assistance or CPAP apparatus, to a wearer of the mask, the method comprising: determining, via at least one processor, a percentile pressure from a previous pressure provided in a ventilatory assistance or CPAP session;applying said percentile pressure as a positive test pressure;determining, via the at least one processor, leak flow from said mask at the positive test pressure; anddisplaying or otherwise indicating a magnitude of the leak flow as an indication of correct mask fitting. 25. The method of claim 24, wherein said leak flow is quantized to represent a degree of leak. 26. The method of claim 24, further comprising: comparing said leak flow against a threshold value representing zero degree of leak; anddetermining that there is correct mask fitting if the threshold is not exceeded. 27. The method of claim 24, further comprising determining a base pressure to be applied as said positive test pressure if there is no percentile pressure available. 28. The method of claim 27, wherein said percentile pressure is chosen from a 75th-95th percentile pressure range. 29. The method of claim 27, wherein said base pressure is in a 10-12 cm H2O range. 30. The method of claim 24, further comprising determining that the previous pressure is available if the ventilatory assistance or CPAP session occurred for greater than a predetermined time interval. 31. The method of claim 30, wherein said predetermined time interval is three hours. 32. The method of claim 24, wherein the positive test pressure is a pressure adapted to test whether the mask leaks when fitted to the wearer.
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이 특허에 인용된 특허 (29)
Brunson Kevin K. (Argyle TX) Szygenda Diana M. (N. Richland Hills both of TX), Apparatus and method for testing respirator fit and seal.
Gregory Newton Brewer AU; Gregory Alan Colla AU; Steven Paul Farrugia AU; Chinmayee Somaiya AU, Determination of mask fitting pressure and correct mask fit.
Wallroth Carl F. (Lubeck DEX) Frankenberger Horst (Bad Schwartau DEX) Obermayer Anton (Erlangen DEX) Waschmann Michael (Lubeck DEX) Bayerlein Jorg (Stockelsdorf DEX), Device for supplying breathing gas into a closed ventilating circuit of a medical respirator.
Axe John R. (Arlington TX) Bebehani Khosrow (Arlington TX) Burk John R. (Aledo TX) Lucas Edgar A. (Fort Worth TX) Yen Fu-Chung (Arlington TX), Method and apparatus for controlling sleep disorder breathing.
Sanders Mark H. (Pittsburgh PA) Zdrojkowski Ronald J. (Pittsburgh PA), Method and apparatus for maintaining airway patency to treat sleep apnea and other disorders.
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. ; 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.
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