Ergonomic and adjustable respiratory mask assembly with cushion

Patent metadata

Field	Value
Publication number	US-9421340-B2
Application number	US-201414157624-A
Country	US
Kind code	B2
Filing date	Jan 17, 2014
Priority date	Apr 23, 2002
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A respiratory mask assembly for delivering breathable gas to a patient includes a frame having a front surface and a rear surface adapted in use to face the patient. A cushion having a side wall is removably attachable to the frame. The cushion has a rim extending away from the side wall, and a membrane provided to substantially surround the rim. An inner edge of the membrane defines an aperture, the aperture having a generally trapezoidal shape.

First claim

What is claimed is:

1. A cushion for a respiratory mask, comprising:
a face contacting side adapted to contact a patient's face:
a non-face contacting side; and
a cushion side wall between the face contacting side and the non-face contacting side, the cushion defining a nasal cavity adapted to receive a portion of a patient's nose in use, the cushion having a nasal bridge region, a cheek region and a lip region, the cushion be constructed and arranged so that:
the face contacting side comprises a thin membrane of a resilient elastomer with a thickness in the range of 0.1 mm to 2 mm,
the membrane includes in the nasal bridge region a preformed contoured notch,
the membrane is adapted to direct, in use, a sealing force over a first area of a lower nasal bridge region of a nose of a patient, the first area being located no higher than substantially along a transition between the bony region and the cartilage region of the patient's nose,
the membrane further is adapted to direct, in use, the sealing force to a second region of the face on the upper lip of a patient, and
the side wall defines a substantially constant perimeter from the non-face contacting side to a transition where the thin membrane extends from the side wall.

2. A cushion according to claim 1 , wherein the membrane is further constructed so that when viewed from a cross-section in the nasal bridge region, the membrane is inwardly curved with respect to the side-wall at an angle ranging from about 70° to 90° and has a radius of curvature in the range of about 5 mm to 14 mm.

3. A cushion according to claim 1 , wherein the face contacting side further comprises a rim having a thickness greater than the thickness of the membrane, the rim being constructed to be inwardly curved into the nasal cavity along at least a portion of a perimeter of the rim.

4. A cushion according to claim 3 , wherein the membrane and the rim are spaced from one another in at least the nasal bridge region of the cushion.

Assignees

• Resmed Ltd

Inventors

• Ging Anthony Michael
• Kwok Philip Rodney
• Moore Rachael Elizabeth
• Nasr Saad
• Price Andrew Martin

Classifications

• A61M2210/0618

  Nose · CPC title

• A62B18/084

  Means for fastening gas-masks to heads or helmets · CPC title

• A61M16/0616

  with face sealing means comprising a flap or membrane projecting inwards, such that sealing increases with increasing inhalation gas pressure · CPC title

• A61M16/0622

  having an underlying cushion · CPC title

• A61M16/0694

  Chin straps · CPC title