Humidification arrangement for a respiratory apparatus
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61M-016/00
A62B-007/00
F24J-003/00
A61M-015/00
H05B-003/00
F23D-011/00
F23D-014/00
A61M-016/16
A61M-016/08
A61M-016/10
A61M-016/14
출원번호
US-0449355
(2008-02-06)
등록번호
US-8944056
(2015-02-03)
우선권정보
AU-2007900653 (2007-02-09)
국제출원번호
PCT/AU2008/000145
(2008-02-06)
§371/§102 date
20090804
(20090804)
국제공개번호
WO2008/095245
(2008-08-14)
발명자
/ 주소
Virr, Alexander
Darkin, Donald
Row, Nathan John
Klasek, Paul Jan
출원인 / 주소
ResMed Limited
대리인 / 주소
Nixon & Vanderhye P.C.
인용정보
피인용 횟수 :
0인용 특허 :
12
초록▼
A humidifying apparatus utilizing a semi-permeable membrane portion within a gas conduit where the direction of gas flow within a central lumen is given by an arrow. The humidification apparatus has a helical configuration for the semi-permeable membrane portion, a structural reinforcing member or m
A humidifying apparatus utilizing a semi-permeable membrane portion within a gas conduit where the direction of gas flow within a central lumen is given by an arrow. The humidification apparatus has a helical configuration for the semi-permeable membrane portion, a structural reinforcing member or members, a water channel and a heating element. The helical configuration of an outer wall may be similar to conventional conduits that are in common use in respiratory apparatus. Thus the humidification apparatus may be readily substituted into existing respiratory device by exchanging the gas conduit.
대표청구항▼
1. A gas conduit for a respiratory apparatus, including a lumen for passage of a breathable gas to a patient and a flexible conduit wall surrounding the lumen, the flexible conduit wall having a humidification apparatus for delivering water vapour into the gas passing through the lumen, the humidifi
1. A gas conduit for a respiratory apparatus, including a lumen for passage of a breathable gas to a patient and a flexible conduit wall surrounding the lumen, the flexible conduit wall having a humidification apparatus for delivering water vapour into the gas passing through the lumen, the humidification apparatus being configured to generate the water vapour regardless of a presence of condensation in the gas conduit. 2. A gas conduit according to claim 1, wherein said humidification apparatus comprises: one or more liquid water delivery passages configured to contain liquid water and extending along the conduit wall; andmeans for vaporising said liquid water to produce said water vapour. 3. A gas conduit according to claim 2, wherein said one or more water delivery passages extend helically along said conduit wall. 4. A gas conduit according to claim 2, wherein said one or more water delivery passages extend longitudinally along said conduit wall. 5. A gas conduit according to claim 1, wherein the humidification apparatus includes one or more liquid water delivery passages configured to contain liquid water and a heater for heating the liquid water to form water vapour. 6. A gas conduit according to claim 5, wherein the heater is in thermal contact with the one or more liquid water delivery passages such that the heater heats the liquid water within the humidification apparatus. 7. A gas conduit according to claim 5, wherein said heater is in thermal contact with the gas passing through the lumen. 8. A gas conduit according to claim 5, further comprising a plurality of humidification apparatuses and/or a plurality of heaters adapted for independent actuation. 9. A gas conduit according to claim 1, wherein the humidification apparatus includes one or more semi-permeable membrane portions allowing water vapour to pass therethrough into the lumen. 10. A gas conduit according to claim 9, wherein the one or more semi-permeable membrane portions form portions of an inner surface of the conduit wall. 11. A gas conduit according to claim 9, wherein the one or more semi-permeable membrane portions comprise finely perforated material. 12. A gas conduit according to claim 9, wherein the one or more semi-permeable membrane portions comprise hydrophobic material. 13. A gas conduit according to claim 9, wherein the one or more semi-permeable membrane portions comprise a plurality of water tubes forming one or more portions of an inner wall of the gas conduit. 14. A gas conduit according to claim 13, wherein the humidification apparatus comprises at least one wick and/or capillary action device associated with the one or more portions of the inner wall for transporting water into said lumen. 15. A gas conduit according to claim 14, wherein the at least one wick device comprises hydrophilic material. 16. A gas conduit according to claim 14 wherein the at least one wick device is located in one or more water delivery passages. 17. A gas conduit according to claim 14, wherein the inner wall forms at least a portion of the plurality of water tubes and said portion of the plurality of water tubes has a plurality of through holes to the lumen. 18. A gas conduit according to claim 17, wherein each through hole has a width in the range of 0.2 micrometers to 1 millimeter. 19. A gas conduit according to claim 14 where the inner wall forms at least a portion of the plurality of water tubes and said portion of the plurality of water tubes is a semi-permeable membrane allowing water vapour to pass therethrough into the lumen. 20. A gas conduit according to claim 19, wherein said semi-permeable membrane comprises finely perforated material. 21. A gas conduit according to claim 19, wherein said semi-permeable membrane comprises hydrophobic material. 22. A method of humidifying a breathable gas being delivered by a respiratory apparatus to a patient, including the steps of: providing a gas conduit in series between a PAP device and a patient interface;supplying liquid water to the gas conduit; andactuating the PAP device and a humidification apparatus so that the humidification apparatus provides water vapour into the gas being delivered to the patient,wherein the gas conduit includes a lumen for passage of the breathable gas to the patient and a flexible conduit wall surrounding the lumen, the humidification apparatus being positioned within the flexible conduit wall. 23. A method according to claim 22, wherein the humidification apparatus vaporizes the liquid water within the gas conduit. 24. A method according to claim 23, wherein the liquid water is vaporized outside the lumen. 25. A method according to claim 24, wherein the humidification apparatus provides water vapour through a semi-permeable membrane defining the lumen. 26. A method according to claim 25, wherein the humidification apparatus is provided between the semi-permeable membrane and the flexible conduit wall. 27. A gas conduit for a respiratory apparatus, the gas conduit comprising: a lumen for passage of a breathable gas to a patient;a flexible conduit wall surrounding the lumen; anda humidification apparatus for delivering water vapour into the gas passing through the lumen, the humidification apparatus being positioned within the flexible conduit wall and comprising: a liquid water retainer positioned within the flexible conduit wall and configured to retain liquid water supplied from a liquid water source that is separate from the gas conduit; anda heater configured to generate the water vapour from the liquid water in the liquid water retainer. 28. A gas conduit according to claim 27, wherein one end of the liquid water retainer is closed. 29. A gas conduit according to claim 27, the liquid water retainer comprises an inlet and an outlet configured to fluidly connect to the liquid water source so that the liquid water retainer is in a loop arrangement with the liquid water source. 30. A gas conduit according to claim 27, wherein the heater is in thermal contact with the liquid water retainer such that the heater heats the liquid water within the liquid water retainer. 31. A gas conduit according to claim 30, wherein the heater is in thermal contact with the gas passing through the lumen. 32. A gas conduit according to claim 31, wherein the humidification apparatus further comprises one or more semi-permeable membrane portions allowing water vapour to pass therethrough into the lumen and restricting the liquid water from passing therethrough into the lumen. 33. A gas conduit according to claim 32, wherein the one or more semi-permeable membrane portions comprise hydrophobic material. 34. A gas conduit according to claim 27, wherein the heater is configured to provide uniform, variable and/or sectional heating along the conduit. 35. A gas conduit according to claim 34, further comprising a temperature sensor integral to the flexible conduit wall. 36. A gas conduit according to claim 27, wherein the liquid water retainer is located outside of the lumen. 37. A gas conduit according to claim 27, wherein the liquid water is supplied independently of at least one of gas washout and condensation. 38. A respiratory apparatus comprising: a flow generator configured to generate a flow of pressurized gas;a patient interface configured to engage a patient; anda gas conduit according to claim 1 provided in series between the flow generator and the patient interface. 39. A respiratory apparatus comprising: a flow generator configured to generate a flow of pressurized gas;a patient interface configured to engage a patient; anda gas conduit according to claim 27 provided in series between the flow generator and the patient interface. 40. A gas conduit for a respiratory apparatus, the gas conduit comprising: a gas passage for conveying gas through the gas conduit;a flexible conduit wall surrounding the gas passage; anda humidification apparatus for delivering water vapour into the gas passing through the gas passage, the humidification apparatus being positioned within the flexible conduit wall and comprising: one or more liquid water channels positioned around the gas passage so that the one or more liquid water channels are between an exterior surface of the gas conduit and all of the gas flowing through the gas conduit; andone or more heaters configured to generate the water vapour from liquid water in the one or more liquid water channels regardless of a presence of condensation in the gas conduit. 41. A gas conduit according to claim 40, wherein the one or more heaters are in thermal contact with the one or more liquid water channels such that the one or more heaters heat the liquid water within the one or more liquid water channels. 42. A gas conduit according to claim 41, wherein the one or more heaters are in thermal contact with the gas passing through the gas passage. 43. A gas conduit according to claim 42, wherein the humidification apparatus further comprises one or more semi-permeable membrane portions allowing water vapour to pass therethrough into the gas passage and restricting the liquid water from passing therethrough into the gas passage. 44. A gas conduit according to claim 43, wherein the one or more semi-permeable membrane portions comprise hydrophobic material. 45. A gas conduit according to claim 40, wherein the one or more heaters are configured to provide uniform, variable and/or sectional heating along the conduit. 46. A gas conduit according to claim 45, further comprising a temperature sensor integral to the flexible conduit wall. 47. A respiratory apparatus comprising: a flow generator configured to generate a flow of pressurized gas;a patient interface configured to engage a patient; anda gas conduit according to claim 40 provided in series between the flow generator and the patient interface.
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이 특허에 인용된 특허 (12)
Smith, Daniel John; Baldwin, David Peter, Conduit with heated wick.
Elsworth Adrian J. (Auckland NZX) Daniell Michael G. (Auckland NZX) Zwaan Paul (Auckland NZX) Stewart David P. M. (Auckland NZX), Methods of and/or apparatus for humidifying gases.
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