A face mask for delivering oxygen to, and sampling carbon dioxide exhaled from, a subject includes a partition wall that divides the mask into a subject respiratory space that primarily contains carbon dioxide exhaled by the subject, and an oxygen reservoir space that primarily contain oxygen. The partition wall includes one or two holes to which naris conduits are respectively connected. The naris conduit are positioned in proximity to the subject's nares to closely obtain carbon dioxide samples. The naris conduits enable oxygen to flow from the oxygen reservoir space to the subject respiratory space during inhalation, while quickly expelling traces of CO2, and they configured such that exhaled CO2 quickly fills them up, during exhalation, and while expelling oxygen traces back to the oxygen reservoir space. During exhalation.

Customized CPAP masks and related modeling algorithms in accordance with embodiments of the invention are illustrated. One embodiment includes a method for generating a surface model of a CPAP mask, the method including obtaining facial scan data of a user's face, determining a set of landmark points from the facial scan data, wherein the set of landmark points relate to anatomical locations on the user's face, generating a base model, and deforming the base model into a deformed model using the set of landmark points.

A mask is disclosed that has a gas outlet which is quiet and provides for a diffused outlet flow of gases. The outlet is preferably a slot formed between a hollow body and cover over said hollow body. The mask also preferably extends and seals under a user's chin in use.

A face mask for extended wear by a user including a customized, contoured facial mask portion constructed and configured to cover and matingly contact a corresponding contoured surface area of a human face, preferably formed by 3D printing methods and materials.

An electronic apparatus for use in selecting a patient interface device and including a geometric fit score determining unit (42) configured to calculate a geometric fit score for each of one or more of patient interface devices, a patient criteria fit score determining unit (44) configured to calculate a patient criteria fit score for each of the one or more patient interface devices, and an overall fit score determining unit (46) configured to calculate an overall fit score for each of the one or more patient interface devices based on the calculated geometric fit score and the calculated patient criteria fit score for each of the one or more patient interface devices.

A respiratory mask assembly for delivering breathable gas to a patient includes a frame having a front surface and a rear surface, opposite the front surface, and adapted in use to face the patient. The frame defines an inner wall and an outer wall extending from the rear surface, the inner and outer walls being spaced to define a channel therebetween. A cushion is removably attachable to the frame such that the cushion and frame are repeatably engagable with and disengagable from one another. The cushion includes a side wall to be inserted into the channel of the frame, the side wall having a first interlocking surface that engages a second interlocking surface provided in the channel when the cushion and frame are engaged with one another. The first and second interlocking surfaces interlock with one another to removably attach the cushion to the frame.

A shroud (1020) for a mask system includes a retaining portion structured to retain a frame (1040), a pair of upper headgear connectors (1024) each including an elongated arm (1026) and a slot (1027) at the free end of the arm adapted to receive a headgear strap, and a pair of lower headgear connectors (1025) each adapted to attach to a headgear strap. The retaining portion, the upper headgear connectors, and the lower headgear connectors are integrally formed as a one piece structure.

The present disclosure relates to systems and methods for identifying a mouthpiece thickness that provides an athlete with optimal breathing that enhances the performance of an athlete when participating in a contact sport. Mouthpieces and methods consistent with the present disclosure may also increase the safety of a contact sport by identifying mouthpiece sizes that correspond to a lower injury rate.

A nasal interface for a device that attached to a user's nose is described. The nasal interface is particularly adaptable for a CPAP device and includes a device body having air passages through the body terminating in a pair of end portions, with each end portion having at least one outlet in a first surface of the end portion and a nasal interface supported on the body, the nasal interface comprising a pair of nose buds having flared fittings at end portions thereof.

A respiratory mask for providing positive pressure therapy having ball jointed elbow, one or more detachable forehead pieces and headgear comprising a spacer fabric region is disclosed herein. The elbow is configured to be removable when oriented to a predetermined position. The forehead pieces are provided in one or more sizes. The spacer fabric region comprises two or more layers wherein the raw edges are turned to the inside of the layers. The seal comprises features that improves seal performance and accommodates a wider variety of facial geometries.