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In one embodiment, a nasal cannula is shaped to fit within a user's nares, where the nasal cannula includes at least one prong allowing high flow delivery of humidified gases and creates positive airway pressure in the patient's airway. The prongs have angled ends such that, in use, gases flowing th

In one embodiment, a nasal cannula is shaped to fit within a user's nares, where the nasal cannula includes at least one prong allowing high flow delivery of humidified gases and creates positive airway pressure in the patient's airway. The prongs have angled ends such that, in use, gases flowing through the prongs are directed to the user's nasal passages. The nasal cannula body is partially swiveling and preferably has a ball joint connector. In another embodiment the nasal cannula may have at least one flared end prong that preferably seals within a patient's nare.

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1. An apparatus for supplying pressurized breathing gases from a gases supply to a user through an inspiratory conduit to provide a positive airway pressure in the user's airways, the apparatus comprising: a rigid body that defines a gases passageway through which breathing gases can flow, the body

1. An apparatus for supplying pressurized breathing gases from a gases supply to a user through an inspiratory conduit to provide a positive airway pressure in the user's airways, the apparatus comprising: a rigid body that defines a gases passageway through which breathing gases can flow, the body comprising a first end and a second end, the first end being wider than the second end, the second end defining a gas inlet to the gases passageway, the body further comprising an extension extending from a perimeter of the first end, the body further comprising an elongate surface having opposed rounded ends, the body further comprising a headgear extension to which a headgear strap is attached;an elastomeric seal that creates a seal with the user's face, wherein the seal surrounds the extension extending from the perimeter of the first end of the body;an angled conduit connector that connects the gases passageway of the body with the inspiratory conduit, the angled conduit connector extending to a swivelable connector; anda bias flow vent comprising a plurality of openings defined in the elongate surface of the rigid body, wherein the plurality of openings are arranged in a pattern, the pattern being symmetrical with respect to a centerline of the apparatus, wherein each of the plurality of openings is located on the elongate surface;wherein the plurality of openings are further arranged in a plurality of lines, each of the plurality of lines comprising more than one of the plurality of openings, the plurality of lines comprising a middle line and a pair of adjacent lines, wherein one of the pair of adjacent lines is positioned on one side of the middle line and the other of the pair of adjacent lines is positioned on the other side of the middle line, wherein the openings within the pair of adjacent lines are offset from the openings within the middle line, and wherein each of the pair of adjacent lines comprises the same number of openings;wherein the pattern further comprises a pair of relatively outer lines, wherein one of the pair of relatively outer lines is positioned on one side of the middle line and pair of adjacent lines and the other of the pair of relatively outer lines is positioned on the other side of the middle line and pair of adjacent lines, wherein each of the pair of relatively outer lines comprises one less opening than each of the pair of adjacent lines, and wherein the pair of relatively outer lines comprise the same number of openings as the middle line;wherein an end of the pattern comprises a first pair of diagonally arranged openings and a second pair of diagonally arranged openings, the first and second pair of diagonally arranged openings being a mirror image of each other relative to the middle line, and the end is defined by ends of the pair of adjacent lines;wherein the end of the pattern further comprises a first set of aligned openings and a second set of aligned openings positioned inwardly of and offset from the first set of aligned openings, wherein the first set of aligned openings comprises two openings and the second set of aligned openings comprises three openings, wherein the first set of aligned openings is defined by ends of the pair of adjacent lines and the second set of aligned openings is defined by ends of the pair of relatively outer lines and the middle line; andwherein openings in each of the pairs of adjacent lines are aligned and openings in each of the pair of relatively outer lines are aligned with corresponding openings of the middle line. 2. An apparatus for supplying pressurized breathing gases from a gases supply to a user through an inspiratory conduit to provide a positive airway pressure in the user's airways, the apparatus comprising: a rigid body that defines a gases passageway through which breathing gases can flow;an elastomeric seal comprising a first end configured form a seal with the user's face, and a second end configured to be coupled to the rigid body;an angled conduit connector that connects the gases passageway of the rigid body with the inspiratory conduit, the angled conduit connector extending to a swivelable connector, wherein the angled conduit connector is configured to rotate to allow for movement of the inspiratory conduit; anda bias flow vent comprising a plurality of openings located on the rigid body, wherein each of the plurality of openings is located on a surface of the rigid body, wherein the plurality of openings are arranged in a pattern, the pattern being symmetrical with respect to a centerline of the apparatus, wherein the plurality of openings are further arranged in a plurality of lines, each of the plurality of lines comprising more than one of the plurality of openings, the plurality of lines comprising a middle line and a pair of adjacent lines, wherein one of the pair of adjacent lines is positioned on one side of the middle line and the other of the pair of adjacent lines is positioned on the other side of the middle line. 3. The apparatus of claim 2, wherein each of the pair of adjacent lines has the same number of openings. 4. The apparatus of claim 3, further comprising a pair of relatively outer lines, wherein one of the pair of relatively outer lines is positioned on one side of the middle line and pair of adjacent lines and the other of the pair of relatively outer lines is positioned on the other side of the middle line and pair of adjacent lines, wherein each of the pair of relatively outer lines comprises one less opening than each of the pair of adjacent lines. 5. The apparatus of claim 2, wherein an end of the plurality of openings comprises a first pair of diagonal openings and a second pair of diagonal openings, the first and second pair of diagonal openings being a mirror image of each other relative to the middle line. 6. The apparatus of claim 5, wherein the end is defined by the pair of adjacent lines and the middle line. 7. The apparatus of claim 2, wherein each of the pair of adjacent lines extends past the middle line on at least one end of the plurality of openings. 8. The apparatus of claim 2, wherein an end of the plurality of openings comprises a first set of aligned openings and a second set of aligned openings positioned inwardly of and offset from the first set of aligned openings, wherein the first set of aligned openings comprises two openings and the second set of aligned openings comprises three openings. 9. The apparatus of claim 2, wherein at least one of the plurality of lines includes exactly seven openings. 10. The apparatus of claim 2, wherein the rigid body comprises an elongate surface in which the plurality of openings is provided, wherein the elongate surface comprises opposed rounded ends. 11. The apparatus of claim 2, wherein the rigid body comprises a flat surface portion through which the plurality of openings is provided. 12. The apparatus of claim 2, wherein the openings within the pair of adjacent lines are offset from the openings within the middle line and the pair of relatively outer lines. 13. The apparatus of claim 2, wherein the middle line, the pair of adjacent lines, and the pair of relatively outer lines are parallel with respect to each other. 14. The apparatus of claim 2, wherein the angled conduit connector is made from a rigid plastic material. 15. The apparatus of claim 2, wherein the rigid body further comprises a headgear extension and an aperture, wherein a headgear strap is configured to engage the aperture. 16. An apparatus for supplying pressurized breathing gases from a gases supply to a user through inspiratory conduit to provide a positive airway pressure in the user's airways, the apparatus comprising: a body that defines a gases passageway through which breathing gases can flow, the body comprising a first end and a second end, the first end being wider than the second end, the second end defining a gas inlet to the gases passageway, the body further comprising an extension around a perimeter of the first end, the body further comprising a flat surface portion positioned along a centerline of the apparatus;a seal that creates a seal with the user's face, wherein the seal is coupled to the extension that surrounds the perimeter of the first end of the body;a conduit connector that connects the gas inlet of the body with the inspiratory conduit, the conduit connector extending to a swivelable connector to allow for movement of the inspiratory conduit; anda bias flow vent comprising a plurality of openings, wherein each of the plurality of openings is defined in the flat surface of the body;wherein the plurality of openings are arranged in a pattern, the pattern being symmetrical with respect to a centerline of the apparatus, and the pattern being narrower at a position closer to the conduit connector; andwherein the plurality of openings define a plurality of lines, each of which includes more than one opening, wherein the openings within adjacent lines are offset from one another. 17. The apparatus of claim 16, wherein the plurality of openings are arranged to have a line of three holes that is diagonal with respect to the centerline of the apparatus. 18. The apparatus of claim 16, wherein at least a portion of the flat surface portion is recessed with respect to the body. 19. The apparatus of claim 16, wherein the body further comprises a pair of headgear connector portions. 20. The apparatus of claim 16, wherein the conduit connector is configured to rotate to allow for movement of the inspiratory conduit.