WO1998018514B1 - Nasal air mask - Google Patents

Nasal air mask

Info

Publication number
WO1998018514B1
WO1998018514B1 PCT/US1997/019752 US9719752W WO9818514B1 WO 1998018514 B1 WO1998018514 B1 WO 1998018514B1 US 9719752 W US9719752 W US 9719752W WO 9818514 B1 WO9818514 B1 WO 9818514B1
Authority
WO
WIPO (PCT)
Prior art keywords
invention according
patient
conduit
mask
seal
Prior art date
Application number
PCT/US1997/019752
Other languages
French (fr)
Other versions
WO1998018514A1 (en
Filing date
Publication date
Priority claimed from US08/741,524 external-priority patent/US6019101A/en
Application filed filed Critical
Priority to AU52420/98A priority Critical patent/AU5242098A/en
Publication of WO1998018514A1 publication Critical patent/WO1998018514A1/en
Publication of WO1998018514B1 publication Critical patent/WO1998018514B1/en

Links

Abstract

The nasal mask (10) is useful for patients suffering from respiratory ailments such as sleep apnea syndrome. The mask (10) includes a shell (12) having a contoured portion (14) circumscribing the nasal area and side wings (16) through which a retention strap (40) passes. A seal (20) is disposed between the shell (12) and the patient's face providing a large contact area to distribute retention forces and reduce facial pressure. Transmission of external loads to and torques induced in the shell (12) are minimized by orienting inlets (54) proximate side wings (16) and supporting a supply conduit (52) along the strap (40).

Claims

AMENDED CLAIMS[received by the International Bureau on 30 April 1998 (30.04.98); original claims 1-41 replaced by amended claims 1-39 (6 pages)]
1. A nasal mask comprising: a shell comprising: a contoured portion having an interior surface and a perimeter configured to form a chamber around a nose of a patient donning said mask; and at least one side wing extending outwardly from said contoured portion along a cheek of the patient; and a seal disposed between said shell and the patient, said seal comprising: a contoured surface disposed about said perimeter for sealing said chamber around a nose of the patient; and a vertex extending along said side wing to increase contact area between said seal and the patient thereby reducing slippage of said mask for a given induced force.
2. The invention according to claim 1 wherein said seal comprises a bladder.
3. The invention according to claim 2 wherein said bladder is filled with silicone.
4. The invention according to claim 2 wherein said bladder is filled with a viscous medium.
5. The invention according to claim 1 wherein said seal is bonded to said shell.
6. The invention according to claim 1 further comprising: an inlet disposed in said contoured portion for providing fluid communication with said chamber.
7. The invention according to claim 6 wherein said inlet includes a centerline which is oriented substantially parallel to said wing.
8. The invention according to claim 6 further comprising: a second inlet; and a second wing, wherein said second inlet and said second wing are disposed symmetrically about said contoured portion relative to said respective corresponding inlet and wing.
9. The invention according to claim 6 wherein said inlet is connectable to a breathable gas source.
10. The invention according to claim 6 wherein said inlet is connectable to diagnostic apparatus.
11. The invention according to claim 6 wherein said inlet is sealable.
12. The invention according to claim 1 further comprising: an outlet disposed in said contoured portion for providing fluid communication with said chamber.
13. The invention according to claim 12 wherein said outlet comprises an aperture.
14. The invention according to claim 1 wherein said shell further comprises a nose clip disposed along said contoured portion.
15. The invention according to claim 1 further comprising: a second side wing symmetrically disposed about said contoured portion relative to said corresponding wing, each wing including a distal end remote from said contoured portion; and a strap captured by said distal ends for retaining said mask on the patient.
16. The invention according to claim 15 wherein said distal ends include respective slots through which said strap slidingly passes. -28-
17. The invention according to claim 15 wherein said strap comprises a continuous loop.
18. The invention according to claim 17 wherein said loop comprises: a first portion oriented to cradle a neck of the patient; and a second portion oriented to cradle a head of the patient.
19. The invention according to claim 18 wherein said second loop portion is bifurcated along an extent thereof to cradle an upper and a rear portion of the patient's head.
20. The invention according to claim 15 wherein said strap has a length which is adjustable.
21. The invention according to claim 15 wherein said strap is elastically compliant.
22. The invention according to claim 15 wherein said strap includes at least one retainer for supporting a conduit connectable to an inlet disposed in said contoured portion for providing fluid communication with said chamber.
23. The invention according to claim 22 further comprising a conduit connected to said inlet, said conduit supported on said strap by said retainer.
24. The invention according to claim 23 wherein said conduit is supported loosely such that said conduit may slide axially relative to said strap.
25. The invention according to claim 23 wherein said conduit is supported on said strap by said retainer at a zone remote from said side wing.
26. The invention according to claim 25 wherein said remote zone is located proximate an upper or rear portion of a head of the patient. -29-
27. The invention according to claim 25 wherein said conduit connects to a breathable gas source at said remote zone.
28. The invention according to claim 27 wherein said gas source comprises a second conduit and said retained conduit is more compliant than said second conduit.
29. Apparatus for treating a respiratory ailment in a recumbent or sleeping patient comprising: a regulated supply for providing a flow of gas responsive to patient needs; a conduit having a lumen in fluid communication with said supply; and a mask having a connection in fluid communication with said lumen wherein: said mask provides said gas flow to a substantially sealed chamber including, at least, a nasal area of the patient; and said connection is disposed remotely from the nasal area and constrained such that leakage from said sealed chamber due to movement of the patient is substantially precluded.
30. The invention according to claim 29 wherein said mask includes biasing apparatus: for preventing leakage from said sealed chamber when the patient is immobile; and for attenuating forces induced in said mask by said conduit when the patient moves.
31. The invention according to claim 29 further comprising: a mask conduit providing fluid communication between said connection and said sealed chamber wherein said mask conduit is routed to permit the patient to recline without bearing thereon. -30-
32. The invention according to claim 29 wherein said gas is - air.
33. A mask for treating a respiratory ailment in a recumbent or sleeping patient comprising: a shell for forming a chamber with a facial area of the patient; and a seal for substantially sealing said chamber, said seal comprising: a perimeter circumscribing an aperture formed therein, said perimeter comprising: an outer perimeter configured to mate with said shell; and an inner perimeter configured, at least in part, with a taper which readily deforms when biased into contact with a contour of a patient's facial area to form a seal therewith; and a vertex extending from said perimeter remotely from said aperture to increase contact area between said seal and the patient thereby reducing slippage of said mask for a given induced force.
34. The invention according t claim 33 wherein said aperture is generally triangular.
35. The invention according to claim 33 wherein said aperture is sized to circumscribe a nasal or an oral area of a patient.
1 36. The invention according to claim 33 wherein said aperture is sized to circumscribe a nasal and an oral area
3 of a patient.
1 37. The invention according to claim 33 wherein said seal
2 further comprises a second vertex extending generally
3 symmetrically from said perimeter for contact with a facial
4 area of a patient remote from said aperture. -31-
38. The invention according to claim 33 wherein said seal comprises molded silicone.
39. The invention according to claim 38 wherein said seal further comprises a polyethylene bladder encasing said molded silicone.
PCT/US1997/019752 1996-10-31 1997-10-30 Nasal air mask WO1998018514A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU52420/98A AU5242098A (en) 1996-10-31 1997-10-30 Nasal air mask

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/741,524 US6019101A (en) 1996-10-31 1996-10-31 Nasal air mask
US08/741,524 1996-10-31

Publications (2)

Publication Number Publication Date
WO1998018514A1 WO1998018514A1 (en) 1998-05-07
WO1998018514B1 true WO1998018514B1 (en) 1998-06-11

Family

ID=24981058

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/019752 WO1998018514A1 (en) 1996-10-31 1997-10-30 Nasal air mask

Country Status (3)

Country Link
US (1) US6019101A (en)
AU (1) AU5242098A (en)
WO (1) WO1998018514A1 (en)

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