The present disclosure relates to a respiratory interface, in particular a respiratory patient interface to provide gases or fluids to a patient.

BACKGROUND

[0002] Breathing assistance apparatuses are used in various environments such as hospital, medical facility, residential care, or home environments to deliver a flow of gases to users or patients. A breathing assistance or respiratory therapy apparatus (collectively, 'respiratory apparatus' or 'respiratory devices') may be used to deliver a flow of gases e.g. air and/or supplementary oxygen or other gases to a user. Respiratory devices may also comprise a humidification apparatus to deliver heated and humidified gases. A respiratory apparatus may allow adjustment and control over characteristics of the gases flow, including flow rate, temperature, gases concentration, humidity, pressure, etc. Sensors, such as flow sensors and/or pressure sensors are used to measure characteristics of the gases flow.

SUMMARY

[0003] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a single sealing nasal prong, the single sealing nasal prong comprising :

a seal body configured to seal with one of the nares of a patient, the seal body having or comprising substantially opposing front and rear surfaces, and substantially opposing left and right surfaces, the substantially opposing front and rear surfaces being substantially symmetrical to each other,

an inlet configured to receive gases,

an outlet configured to supply the gases to the patient, the outlet located in a generally central location between the left and right surfaces such that the single sealing nasal prong can seal either one of the patient's nares,

wherein the seal body and the outlet of the single sealing nasal prong are arranged such that one of the patient's nares is substantially sealed and gases are supplied to that nare from the outlet while the other of the patient's nares is unsealed and is free from direct gases supply from the outlet.

[0004] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a single sealing nasal prong, the single sealing nasal prong comprising : a seal body configured to seal with one of the nares of a patient, the seal body having or comprising substantially opposing front and rear surfaces, and substantially opposing left and right surfaces, the substantially opposing left and right surfaces being substantially symmetrical to each other,

an inlet configured to receive gases,

an outlet configured to supply the gases to the patient, the outlet located in a generally central location between the left and right surfaces such that the single sealing nasal prong can seal either one of the patient's nares,

wherein the seal body and the outlet of the single sealing nasal prong are arranged such that one of the patient's nares is substantially sealed and gases are supplied to that nare from the outlet while the other of the patient's nares is unsealed and is free from direct gases supply from the outlet.

[0005] Optionally, the substantially opposing front and rear surfaces are substantially symmetrical to each other.

[0006] Optionally, the respiratory interface further comprises a gases delivery assembly, the gases delivery assembly comprising the single sealing nasal prong.

[0007] Optionally, the gases delivery assembly further comprises a conduit connected to, or connectable to the single sealing nasal prong.

[0008] Optionally, the respiratory interface further comprises headgear connected to, or connectable to, the gases delivery assembly.

[0009] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface consisting of:

a gases delivery assembly having :

a single sealing nasal prong with a seal body configured to seal with one of the nares of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient,

a conduit directly coupled to the single sealing nasal prong and in fluid

communication with the single sealing nasal prong, and

headgear connected to, or connectable to, the gases delivery assembly.

[0010] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a gases delivery assembly, the gases delivery assembly consisting of: a single sealing nasal prong having a seal body configured to seal with one of the nares of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient;

a conduit directly coupled to the single sealing nasal prong and in fluid communication with the single sealing nasal prong, and

headgear connected to, or connectable to, the gases delivery assembly.

[0011] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a frameless gases delivery assembly comprising :

a single sealing nasal prong having a seal body configured to seal with one of the nares of a patient, the single sealing nasal prong having an inlet configured to receive gases, and an outlet configured to supply the gases to the patient;

a conduit in fluid communication with the single sealing nasal prong; and headgear connected to, or connectable to, the gases delivery assembly.

[0012] Optionally, the headgear is directly connected to the gases delivery assembly.

[0013] Optionally, the headgear is directly connected to the single sealing nasal prong.

[0014] Optionally, the headgear is directly connected to the conduit.

[0015] Optionally, the seal body comprises a wall defining the inlet, the outlet and the seal body.

[0016] Optionally, the wall thickness is about 0.7mm to about 0.8mm.

[0017] Optionally, the respiratory interface further comprises an adjuster configured to decouple the single sealing nasal prong from tension when it is moved from one nare to the other while still allowing the headgear to maintain the headgear retention force.

[0018] Optionally, the adjuster comprises a support.

[0019] Optionally, the support is, or comprises, one or more sliding members.

[0020] Optionally, the support or a strap is, or comprises, a flexible portion.

[0021] Optionally, the adjuster is coupled to a cuff that supports the single sealing nasal prong, in between, or as an intermediate component of, the headgear arrangement.

[0022] Optionally, the respiratory interface further comprises a clip configured to removably fasten the conduit to another item associated with patient.

[0023] Optionally, the outlet is located in a generally central location between the front and rear surfaces.

[0024] Optionally, the opposing left and right surfaces are substantially symmetrical to each other.

[0025] Optionally, the single sealing nasal prong is pivotable about an axis such that it is orientable to fit either of the patient's nares.

[0026] Optionally, the single sealing nasal prong comprises a rigid portion connected to, or connectable to, the gas flow assembly.

[0027] Optionally, the rigid portion provides stability for the single sealing nasal prong relative to the gas flow assembly.

[0028] Optionally, a wall thickness of the rigid portion is about 1.5mm to about 4mm.

[0029] Optionally, the single sealing nasal prong comprises a supple portion configured to substantially conform to shape of the patient's nare.

[0030] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a single sealing nasal prong having a seal body configured to seal with one of the nares of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient;

a conduit having an outlet configured to supply the gases to the single sealing nasal prong, the conduit being coupled with, or couplable with, the single sealing nasal prong such that the conduit outlet is coaxial with the single sealing nasal prong inlet.

[0031] Optionally, a cross-sectional area of the conduit outlet is similar to a cross-sectional area of the prong inlet.

[0032] Optionally, a ratio of the width of the single sealing nasal prong to the length of the single sealing nasal prong is about 0.4 - to about 0.9.

[0033] Optionally, a ratio of a cross sectional area of the prong outlet to a cross sectional area of a conduit outlet 305 is about 0.72.

[0034] Optionally, a ratio of a cross sectional area of the prong outlet to a cross-sectional area of a base of the seal is about 0.33.

[0035] Optionally, the prong outlet is generally centred in relation to the conduit outlet.

[0036] Optionally, the single sealing nasal prong comprises a supple sealing portion.

[0037] Optionally, the single sealing nasal prong comprises a rigid coupling portion.

[0038] Optionally, the rigid coupling portion is integral to the single sealing nasal prong.

[0039] Optionally, the seal body comprises a wall defining the inlet, the outlet and the seal body.

[0040] Optionally, the wall thickness is about 0.7mm to about 0.8mm.

[0041] Optionally, the respiratory interface further comprises a cuff having a prong coupling portion, wherein the single sealing nasal prong is received by, or receivable by, the prong coupling portion of the cuff.

[0042] Optionally, the rigid coupling portion is coupled with the cuff.

[0043] Optionally, the rigid coupling portion comprises the single sealing nasal prong inlet.

[0044] Optionally, a gases path from the conduit to the prong outlet is substantially linear.

[0045] Optionally, the single sealing nasal prong and the conduit assembly form a continuous gases pathway.

[0046] Optionally, the single sealing nasal prong and the conduit assembly form a direct fluid coupling.

[0047] Optionally, the conduit assembly includes a conduit and conduit connector that facilitates coupling between the conduit and the cuff.

[0048] Optionally, an inner surface of the rigid portion comprises an undercut or recess and the cuff comprises a complementary groove, the undercut or recess and the complementary groove interacting with each other to couple the prong to the conduit.

[0049] Optionally, the cuff comprises a headgear attachment hook.

[0050] Optionally, the rigid portion comprises cut outs or recesses configured to receive a portion of a headgear strap.

[0051] Optionally, the cuff comprises teeth configured to grip and retain a portion of a headgear strap.

[0052] Optionally, the conduit and prong arrangement are configured to reduce resistance to flow.

[0053] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a single sealing nasal prong having a seal body configured to seal with one of the nares of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient;

an adjuster configured to allow the single sealing nasal prong to be removable from first nare and positioned in the patient's other nare to seal with the other nare without the single sealing nasal prong being detached from the respiratory interface.

[0054] Optionally, the respiratory interface further comprises headgear, wherein the headgear comprises the adjuster.

[0055] Optionally, the headgear comprises a single strap or a bifurcated strap.

[0056] Optionally, the headgear comprises a stretchable portion.

[0057] Optionally, the headgear comprises a non-stretchable portion.

[0058] Optionally, the non-stretchable portion has a stretchable portion on each side.

[0059] Optionally, the adjuster comprises a sliding member that allows prong adjustment independently from the headstrap.

[0060] Optionally, the single sealing nasal prong is a movable prong.

[0061] Optionally, the single sealing nasal prong is movable between two positions.

[0062] Optionally, the single sealing prong is rotatable from a first location in which the prong seals with a first nare of a patient to a second location in which the prong seals with a second nare of a patient.

[0063] Optionally, the single sealing nasal prong is rotatable about a pivot point or rotatable about a vertical axis.

[0064] Optionally, the pivot point is located between the first location and the second location.

[0065] Optionally, the first location is on a first region of a manifold and the second location is on a second region of the manifold.

[0066] Optionally, the first location on a first region of a manifold and the second location are on the same region of the manifold.

[0067] Optionally, the prong outlet extends at a first angle to correspond to the angle of the first nare when in the first location and the prong outlet extends at a second angle to correspond to the angle of the second nare when in the second location.

[0068] Optionally, the manifold comprises a first outlet corresponding to the first location of the prong and a second outlet corresponding to the second location of the prong.

[0069] Optionally, the respiratory interface further comprises a bung configured to seal the second opening when the single sealing nasal prong is in the first location and seal the first opening when the single sealing nasal prong is in the second location.

[0070] Optionally, the bung is integral with the prong and is configured to rotate as the prong rotates.

[0071] Optionally, the respiratory interface further comprises a tether that couples the bung to the respiratory interface.

[0072] Optionally, the seal body has opposing left and right surfaces and the prong outlet is located in a generally central location between the left and right surfaces such that the single sealing nasal prong can seal either one of the patient's nares.

[0073] Optionally, the seal body has opposing front and rear surfaces and the prong outlet is located in a generally central location between the front and rear surfaces such that the single sealing nasal prong can seal each of the patient's nares independently of vertical orientation.

[0074] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a body with a pair of side arms configured to provide stability for the interface on the cheeks of the patient;

a single sealing nasal prong;

a manifold having a single sided inlet to receive gases from a gas source, and an outlet that delivers gases to the single sealing nasal prong;

wherein the single sealing nasal prong is arranged such that one of the patient's nares is substantially sealed and gases are supplied to that nare from the outlet while the other of the patient's nares is unsealed and is free from direct gases supply from the outlet.

[0075] Optionally, the manifold is a separate part from the side arms, the side arms being couplable to, or coupled with, the manifold.

[0076] Optionally, the sides arms comprise a headgear attachment feature.

[0077] Optionally, a conduit clip engages with, or is engageable with, a conduit.

[0078] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a single sealing nasal prong having a seal body configured to seal with one of the nares of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient;

a support for the single sealing nasal prong strap, the single sealing nasal prong being translatable relative to the support to be interchangeably received by the patient's nares, the single sealing nasal prong remaining coupled to the support; and

headgear connected to, or connectable to, the support.

[0079] Optionally, the support comprises a sliding member.

[0080] Optionally, the support comprises two sliding members.

[0081] Optionally, the sliding member(s) is/are formable or conformable such that the sliding member(s) substantially follow or accommodate a contour of a patient's face.

[0082] Optionally, the sliding member(s) comprise a pre-formed profile.

[0083] Optionally, said pre-formed profile comprises a pre-curve or radiused profile comprising a curve or a profile that substantially follows or accommodates a contour of a patient's face or wherein said curve or profile is substantially convex with respect to a patient's face.

[0084] Optionally, the pre-formed profile comprises one or more of: a radius of about 120° of a circle, about one third of a circle, an arc-shaped configuration.

[0085] Optionally, the pre-formed profile comprises a radius length and/or pre-curve length of about 70mm to about 110mm.

[0086] Optionally, the pre-curved or radiused profile comprises a radius length or pre curve length of about 90mm.

[0087] Optionally, the respiratory interface further comprises clips at end portions of sliding member(s) coupled to, or couplable with, headgear.

[0088] Optionally, the strap(s) are coupled to, or couplable to, the single sealing nasal prong.

[0089] Optionally, the straps are removably coupled to the single sealing nasal prong.

[0090] Optionally, the headgear is a single strap or a bifurcated strap.

[0091] Optionally, at least one terminal end of the headgear comprises a strap attachment.

[0092] Optionally, the strap attachment comprises: a substantially hollow body comprising of internal walls to define a channel therebetween, the substantially hollow body comprising of a mouth end and a terminal end, the mouth end defining an opening into the channel and for receiving a free end of a headstrap, and the terminal end defining an end of the channel substantially distal of the mouth end, the channel providing for a pathway extending between the mouth end and the terminal end through which said headstrap is to be threaded, at least one first projection extending from a base attached to said internal wall to a tip in a direction substantially towards an opposing internal wall or into the channel defined by at least an opposing side wall, wherein the tip is configured to engage at least a portion or a surface of a headstrap to be received within said channel, said tip configured to substantially permit the headstrap to be thread in a direction into the channel and along the pathway from the mouth end to the terminal end and said tip

configured to substantially resist the headstrap from being removed or withdrawn from the channel in a direction extending from the terminal end towards the mouth end of said substantially hollow body, and wherein the tip of the at least one first projection is disposed so as to be spaced off from said opposing internal wall by a pre-determined distance, said pre-determined distance being a function of a thickness of a headstrap to be received within the channel.

[0093] Optionally, the strap attachment comprises: two or more walls defining a channel, the channel configured to receive an end of a headstrap, a first projection set comprising at least one first projection extending from a first wall of the strap attachment and substantially towards or into the channel, the first projection comprising a distal end configured to engage a portion of the headstrap and prevent the end of the headstrap received in the channel, from being removed from the channel, wherein the distal end of the first projection is spaced at a distance from a second opposing wall of the channel, and wherein the distance is provided as a function of a thickness of the headstrap to be received in the channel.

[0094] Optionally, the strap attachment comprises: two or more walls defining a channel, the channel configured to receive an end of a headstrap, a first projection set comprising at least one first projection, a second projection set comprising at least one second projection, and wherein the first projection set and the second projection set extend from opposing walls of the strap attachment into the channel, wherein the at least one first projection of the first projection set and the at least one second projection of the second projection set comprise distal ends configured to engage a portion of a headstrap and prevent removal of an end of the headstrap received in the channel, and wherein the distal ends of the at least one first and second projections taper to, or comprise of, a pointed end or apex.

[0095] Optionally, the strap attachment comprises: two or more walls defining a channel, the channel configured to receive an end of a headstrap, a first projection set comprising at least one first projection, a second projection set comprising at least one second projection, and wherein the first and second projection sets define a curved or tortuous path through which the end of the headstrap is to be received, wherein the at least one first projection of the first projection set and the at least one second projection of the second projection set comprise a distal end to engage a portion of the headstrap and prevent removal of an end of the headstrap received in the channel, and wherein the distal ends of the at least one first and second projections taper to, or comprise of, a pointed end or apex.

[0096] Optionally, the strap attachment comprises a strap termination, or a ferrule.

[0097] Optionally, the at least one terminal end of the headgear is received within a channel of the strap attachment, and wherein, once received, the at least one terminal end of the headgear follows a defined pathway, optionally such as a substantially tortuous path, within the channel of the strap attachment.

[0098] Optionally, the strap attachment comprises a plurality of projections, the plurality of projections comprising a first projection set and a second projection set, and wherein the first and second projection sets are arranged on opposing sides of the channel.

[0099] Optionally, the first projection set and second projection set are arranged to be offset, optionally such as being laterally offset, from each other in an opposing configuration.

[0100] Optionally, the projections are configured to extend towards an end of the strap attachment opposite a headstrap insertion end of the strap attachment.

[0101] Optionally, at least one projection tapers towards a pointed end or tip or apex.

[0102] Optionally, said strap attachment comprises of a mouth through which said headgear is to be inserted into said channel.

[0103] Optionally, said mouth comprises lead-in features.

[0104] Optionally, said lead-in features comprises substantially rounded lips for accommodating or receiving said headgear.

[0105] Optionally, the seal body has opposing left and right surfaces, and the prong outlet is centred between the left and right surfaces such that the single sealing nasal prong can be adjusted to seal in either one of the nares providing therapy to the patient.

[0106] Optionally, the seal body has opposing front and rear surfaces, and the prong outlet is centred between the front and rear surfaces such that the single sealing nasal prong can be inserted independently of vertical orientation.

[0107] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a single sealing nasal prong having a seal body configured to seal with one of the nares of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient;

a cuff comprising a prong coupling portion;

wherein the single sealing nasal prong is received by, or receivable by, the prong coupling portion of the cuff.

[0108] Optionally, the cuff comprises a conduit coupling portion coupled with, or couplable with, a conduit assembly.

[0109] Optionally, single sealing nasal prong comprises an undercut or recess and the cuff comprises a complementary groove.

[0110] Optionally, a portion of the single sealing nasal prong received by, or receivable by, the cuff is a rigid portion.

[0111] Optionally, a portion of the conduit is threaded for engagement with the cuff.

[0112] Optionally, the single sealing nasal prong coupling portion and conduit coupling portion of the cuff are integral to the cuff.

[0113] Optionally, the single sealing nasal prong coupling portion and conduit coupling portion of the cuff are separate parts.

[0114] Optionally, the prong coupling portion of the cuff comprises a shape that generally corresponds to the shape of the single sealing nasal prong.

[0115] Optionally, the prong coupling portion of the cuff is substantially elliptical or oval shaped.

[0116] Optionally, the conduit outlet is aligned with the cuff opening, which in turn aligns with the prong inlet and the prong outlet to maintain a substantially linear gases path from the conduit to the single sealing nasal prong.

[0117] Optionally, the conduit outlet, the cuff opening, and the prong inlet have a similar diameter.

[0118] Optionally, the headgear attachment comprises a ring mounted on the cuff.

[0119] Optionally, an inner surface of the single sealing nasal prong has one or more cut outs on inner to receive a portion of the headstrap.

[0120] Optionally, the headgear attachment comprises one or more teeth on an inner surface of the cuff.

[0121] Optionally, the headstrap held in place via friction fit.

[0122] Optionally, the headstrap coupled to prong via glue, welding, protrusion(s), and/or clips.

[0123] Optionally, the headgear includes a sliding member.

[0124] Optionally, the sliding member is coupled to, or couplable to, the cuff via a clip.

[0125] Optionally, the sliding member is removably coupled to, or removably couplable to, the cuff.

[0126] Optionally, the sliding member decouples movement of the single sealing nasal prong from the headgear.

[0127] Optionally, the sliding member comprises headgear attachment regions at or near each end.

[0128] Optionally, the sliding member is a single sliding member or pair of sliding members.

[0129] Optionally, the sliding member(s) is/are formable or conformable such that the sliding member(s) substantially follow or accommodate a contour of a patient's face.

[0130] Optionally, the sliding member(s) comprise a pre-formed profile.

[0131] Optionally, said pre-formed profile comprises a pre-curve or radiused profile comprising a curve or a profile that substantially follows or accommodates a contour of a patient's face or wherein said curve or profile is substantially convex with respect to a patient's face.

[0132] Optionally, the pre-formed profile comprises one or more of: a radius of about 120° of a circle, about one third of a circle, an arc-shaped configuration.

[0133] Optionally, the pre-formed profile comprises a radius length and/or pre-curve length of about 70mm to about 110mm.

[0134] Optionally, the pre-curved or radiused profile comprises a radius length or pre curve length of about 90mm.

[0135] Optionally, the headgear comprises a single strap, or a bifurcated strap.

[0136] Optionally, at least one terminal end of the headgear comprises a strap attachment.

[0137] Optionally, the strap attachment comprises: a substantially hollow body comprising of internal walls to define a channel therebetween, the substantially hollow body comprising of a mouth end and a terminal end, the mouth end defining an opening into the channel and for receiving a free end of a headstrap, and the terminal end defining an end of the channel substantially distal of the mouth end, the channel providing for a pathway extending between the mouth end and the terminal end through which said headstrap is to be threaded, at least one first projection extending from a base attached to said internal wall to a tip in a direction substantially towards an opposing internal wall or into the channel defined by at least an opposing side wall, wherein the tip is configured to engage at least a portion or a surface of a headstrap to be received within said channel, said tip configured to substantially permit the headstrap to be thread in a direction into the channel and along the pathway from the mouth end to the terminal end and said tip configured to substantially resist the headstrap from being removed or withdrawn from the channel in a direction extending from the terminal end towards the mouth end of said substantially hollow body, and wherein the tip of the at least one first projection is disposed so as to be spaced off from said opposing internal wall by a pre-determined distance, said pre-determined distance being a function of a thickness of a headstrap to be received within the channel.

[0138] Optionally, the strap attachment comprises: two or more walls defining a channel, the channel configured to receive an end of a headstrap, a first projection set comprising at least one first projection extending from a first wall of the strap attachment and substantially towards or into the channel, the first projection comprising a distal end configured to engage a portion of the headstrap and prevent the end of the headstrap received in the channel, from being removed from the channel, wherein the distal end of the first projection is spaced at a distance from a second opposing wall of the channel, and wherein the distance is provided as a function of a thickness of the headstrap to be received in the channel.

[0139] Optionally, the strap attachment comprises: two or more walls defining a channel, the channel configured to receive an end of a headstrap, a first projection set comprising at least one first projection, a second projection set comprising at least one second projection, and wherein the first projection set and the second projection set extend from opposing walls of the strap attachment into the channel, wherein the at least one first projection of the first projection set and the at least one second projection of the second projection set comprise distal ends configured to engage a portion of a headstrap and prevent removal of an end of the headstrap received in the channel, and wherein the distal ends of the at least one first and second projections taper to, or comprise of, a pointed end or apex.

[0140] Optionally, the strap attachment comprises: two or more walls defining a channel, the channel configured to receive an end of a headstrap, a first projection set comprising at least one first projection, a second projection set comprising at least one second projection, and wherein the first and second projection sets define a curved or tortuous path through which the end of the headstrap is to be received, wherein the at least one first projection of the first projection set and the at least one second projection of the second projection set comprise a distal end to engage a portion of the headstrap and prevent removal of an end of the headstrap received in the channel, and wherein the distal ends of the at least one first and second projections taper to, or comprise of, a pointed end or apex.

[0141] Optionally, the strap attachment comprises a strap termination, or a ferrule.

[0142] Optionally, the at least one terminal end of the headgear is received within a channel of the strap attachment, and wherein, once received, the at least one terminal end of the headgear follows a defined pathway, optionally such as a substantially tortuous path, within the channel of the strap attachment.

[0143] Optionally, the strap attachment comprises a plurality of projections, the plurality of projections comprising a first projection set and a second projection set, and wherein the first and second projection sets are arranged on opposing sides of the channel.

[0144] Optionally, the first projection set and second projection set are arranged to be offset, optionally such as being laterally offset, from each other in an opposing configuration.

[0145] Optionally, the projections are configured to extend towards an end of the strap attachment opposite a headstrap insertion end of the strap attachment.

[0146] Optionally, at least one projection tapers towards a pointed end or tip or apex.

[0147] Optionally, said strap attachment comprises of a mouth through which said headgear is to be inserted into said channel.

[0148] Optionally, said mouth comprises lead-in features.

[0149] Optionally, said lead-in features comprises substantially rounded lips for accommodating or receiving said headgear.

[0150] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a single sealing nasal prong comprising :

an inlet configured to receive gases;

an outlet configured to supply the gases to the patient;

a seal body having a wall defining an exterior of the single sealing nasal prong; the seal body and the outlet of the single sealing nasal prong being arranged such that one of the patient's nares is substantially sealed and gases are supplied to that nare from the outlet while the other of the patient's nares is unsealed and is free from direct gases supply from the outlet;

wherein the respiratory interface is configured to provide respiratory flow therapy to the patient through the single sealing nasal prong, wherein the respiratory flow causes flushing of the airways to clear dead space within airways.

[0151] Optionally, the wall having an at-rest shape and being configured to

substantially maintain the at-rest shape upon insertion into a patient's nare.

[0152] Optionally, gases flowing through the gases passage causes the exterior of the single sealing nasal prong to seal with one of the nares of a patient. The gases flowing through the prong may cause the wall of the prong to inflate to seal against the nare of the user.

[0153] Optionally, the wall defines the inlet, the outlet and the seal body.

[0154] Optionally, the wall thickness is about 0.7mm to about 0.8mm.

[0155] Optionally, a cross-section of the prong outlet is generally oval.

[0156] Optionally, the cross-section of the prong outlet is elliptical.

[0157] Optionally, the cross-section of the outlet has a semi-minor radius of about lmm to about 3mm and a semi-major radius of about 4mm to about 24mm.

[0158] Optionally, the cross-section of the outlet has a semi-minor radius of about lmm to about 3mm and a semi-major radius of about 5mm to about 10mm.

[0159] Optionally, the semi-minor radius is about 2mm and the semi-major radius is about 7mm.

[0160] Optionally, the seal body tapers inwardly from the inlet towards the outlet.

[0161] Optionally, a cross-sectional area of the prong outlet is smaller than a cross-sectional area of the prong inlet.

[0162] Optionally, the single sealing nasal prong is configured to provide expiratory pressure between 3.5cmH20 and 16cmH20.

[0163] Optionally, the single sealing nasal prong is configured to provide expiratory pressure between 3.5cmH20 and 20cmH2O.

[0164] Optionally, an exterior of the seal body tapers inwardly from an inlet end toward an outlet end.

[0165] Optionally, an exterior of the seal body is outwardly curved.

[0166] Optionally, the flow rate is controlled to generate desired pressures on inspiration and expiration.

[0167] Optionally, the flow rate is lowered upon expiration to lower the expiratory pressure.

[0168] Optionally, the respiratory interface is configured such that the expiratory pressure is about 5 - 6cmH20.

[0169] Optionally, the respiratory interface is configured such that the expiratory airway pressure is about 5-8 cmH20.

[0170] Optionally, the outlet is configured such that gases delivered from the outlet causes washout of dead space gases through the unsealed nare.

[0171] Optionally, the single nasal prong is interchangeable between nares.

[0172] Optionally, the respiratory interface further comprises one or more sliding members that allows prong adjustment independently from headstrap adjustment.

[0173] Optionally, the respiratory interface further comprises a conduit configured to deliver gases directly to the single sealing nasal prong without passing through another component.

[0174] Optionally, cross section of the prong inlet is substantially similar to a cross section of the conduit outlet.

[0175] Optionally, a cross section of the inlet is substantially similar to a cross section of the conduit proximal to the patient.

[0176] Optionally, a gases path from the conduit to the prong outlet is substantially linear.

[0177] Optionally, the single sealing nasal prong and the conduit form a continuous gases pathway.

[0178] Optionally, the single sealing nasal prong and the conduit form a direct fluid coupling.

[0179] There is provided a single sealing nasal prong comprising :

an inlet configured to receive gases;

an outlet configured to supply the gases to the patient, the outlet having a generally oval cross-section;

a seal body having a wall defining an exterior of the single sealing nasal prong, the exterior of the single sealing nasal prong being outwardly curved and tapering inwardly from an inlet end toward an outlet end;

the wall defining a gases passage between the inlet and the outlet;

wherein gases flowing through the gases passage causes the exterior of the single sealing nasal prong to seal with one of the nares of a patient.

[0180] Optionally, the other nostril is left

[0181] Optionally, a cross-sectional area of the prong outlet is smaller than a cross-sectional area of the prong inlet.

[0182] Optionally, the seal body and the outlet of the single sealing nasal prong are arranged such that one of the patient's nares is substantially sealed and gases are supplied to that nare from the outlet while the other of the patient's nares is unsealed and is free from direct gases supply from the outlet.

[0183] Optionally, the seal body comprises a wall defining the inlet, the outlet and the seal body.

[0184] Optionally, the wall thickness is about 0.7mm to about 0.8mm.

[0185] Optionally, the prong has a sealing portion and a coupling portion.

[0186] Optionally, the coupling portion is more rigid than the sealing portion.

[0187] Optionally, the coupling portion has a lip engaged with, or engageable with, the conduit cuff.

[0188] Optionally, the lip has an undercut to receive the groove from the conduit part.

[0189] Optionally, the prong outlet is positioned relative to the prong body such that the prong can be adjusted to seal in either one of the nares providing therapy to the user.

[0190] Optionally, the single sealing nasal prong is interchangeable between the user's nares.

[0191] Optionally, the single sealing nasal prong is configured to provide expiratory pressure between 3.5cmH20 and 16cmH20.

[0192] Optionally, a cross section of the prong inlet is substantially similar to a cross section of the conduit outlet.

[0193] Optionally, a ratio of the length of the single sealing nasal prong to the width of the single sealing nasal prong is about 1.52 to about 1.59.

[0194] Optionally, a ratio of a cross sectional area of the prong outlet to a cross sectional area of a conduit outlet 305 is about 0.72.

[0195] Optionally, a ratio of a cross sectional area of the prong outlet to a cross-sectional area of a base of the seal is about 0.33.

[0196] Optionally, the prong outlet is generally centred in conduit outlet.

[0197] Optionally, the single sealing nasal prong comprises a supple sealing portion.

[0198] Optionally, the single sealing nasal prong comprises a rigid coupling portion.

[0199] Optionally, a wall thickness of the rigid coupling portion is about 1.5mm to about 4mm.

[0200] Optionally, the prong outlet is centred in the prong body in a horizontal orientation such that the prong can be adjusted to seal in either one of the nares providing therapy to the user.

[0201] Optionally, the prong outlet is centred in the prong body in both a horizontal and vertical orientation such that the prong can be inserted independently of vertical orientation.

[0202] Optionally, the seal body is substantially symmetrical about a vertical axis.

[0203] Optionally, the seal body is substantially symmetrical about a horizontal axis.

[0204] There is provided a respiratory interface for providing a gases flow at a flow rate to clear dead space, the respiratory interface consisting of:

[0205] There is provided a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a gases delivery assembly, the gases delivery assembly consisting of:

only a single sealing nasal prong having a seal body configured to seal with one of the nares of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient;

a conduit directly coupled to the single sealing nasal prong and in fluid communication with the single sealing nasal prong, and

headgear connected to, or connectable to, the gases delivery assembly.

[0206] The gas delivery assembly further includes a support, the support comprising a pair of opposed clips to connect to corresponding clips attached to the headgear.

[0207] Advantageously, the technology as disclosed herein provides for a single nasal prong gases delivery member to deliver a gases therapy to a patient. The single nasal prong can be incorporated as part of a respiratory interface which can be worn by, or is supported upon, a patient.

[0208] The single nasal prong may be of a sealing or partially sealing configuration with the patient or the nare to which the nasal prong is to be associated with.

[0209] Whether the nasal prong should be a sealing or partially sealing configuration may depend upon a gases therapy which is intended to be delivered to the patient. The extent of sealing or partial sealing may depend upon other patient comfort features which may be provisioned as part of the nasal prong design or shape or other comfort or fit or therapy type characteristics. The prong provides some sealing to increase expiratory pressure as compared to unsealed prongs.

[0210] A respiratory interface for delivering gases to a single nare of a patient. The respiratory interface comprising one or a pair of side arms which may be integral with, attachable to, or removably connectable with, a headgear member. The respiratory interface further comprising a frame or bridging member to locate or support a single nasal prong. The frame or bridging member to be substantially locatable in a region beneath the patient's septum, or substantially provided so as to provide for the single nasal prong to be, operatively, provisioned to deliver gases to a nare of a patient.

[0211] The frame or bridging member configured to allow for the translation, rotation or other positioning of said single nasal prong relative to the patient's nare or nares, such that said single nasal prong can be adjustably locatable about said frame or bridging member so as to be positioned for delivery of gases to a single nare, or positioned as to be moveable from one of said patient's nares to the other of said patient's nares.

[0212] The single nasal prong may be translated along or about said frame or bridging member, or may be rotatable with respect to said frame or bridging member, so as to adjust the orientation of said nasal prong with respect to the patient and each of the patient's nares.

[0213] A respiratory interface comprising a base frame and a nasal prong (and optionally a headgear or a connectable or attachable headgear), wherein said nasal prong is laterally adjustable with respect to said base frame.

[0214] A method of configuring the output location of gases from a respiratory interface so as to provide for a supply of gases to a patient, the output provided by a gases delivery member in the form of a nasal prong, wherein said nasal prong is adjustable between a substantially left and a substantially right position with respect to a patient's nares, and relative in location to the remainder of a respiratory interface to which it is in fluid communication.

[0215] In some configurations, a respiratory interface comprises a single sealing nasal prong the single sealing nasal prong comprises a seal body configured to seal with one of the nares of a patient. The seal body may have opposing front and rear surfaces, and opposing left and right surfaces. The opposing front and rear surfaces may be substantially symmetrical to each other. When viewed from the top, the opposing front and rear surfaces may be symmetrical about a vertical plane. The single sealing nasal prong 2 may have the inlet configured to receive gases and the outlet configured to supply the gases to the patient. The inlet of the prong may be distal to the nostril and the outlet may be proximal when the prong is positioned in an operational position. The outlet may be located in a generally central location between the left and right surfaces such that the single sealing nasal prong can seal either one of the patient's nares. The central location of the single sealing nasal prong may be a location in which the centre of the outlet is equidistant from an outer circumferential surface of the prong. The outer circumferential surface may be considered at the widest circumferential region of the prong. Explained another way the outlet of the prong may be in the centre of the outer circumferential surface of the prong body when viewed from the top. The outlet may be positioned such that the prong may be symmetrical about at least two perpendicular vertical planes passing through the prong.

[0216] The location of the prong outlet may allow the single sealing nasal prong to be used independently of nostril orientation and may allow the prong to seal with either nostril. Human nostrils are angled toward each other and the current prong may be shaped and configured to seal with either nostril. The seal body and the outlet of the single sealing nasal prong may be arranged such that one of the patient's nares is substantially sealed and gases are supplied to that nare from the outlet while the other of the patient's nares is unsealed and is free from direct gases supply from the outlet or gases supply from a respiratory system to which the respiratory interface is part of. The outlet being centrally located helps to allow the prong to engage and seal against either the left or right nostril of the user. The prong may be shaped to fit into and substantially occlude either the right or left nostril of the user. For example, the prong can be positioned or located on the patient's face in two different orientations. That is, the interface could itself be rotated 180 degrees and still appropriately fit the patient for suitable prong engagement with a patient's nare. The central prong outlet location can also allow the interface to be suitably fitted for engagement in or with the nare when rotated about 180 degrees and as such can be considered to be orientation-independent when being positioned on the patient's face, provided the sliding member or members (e.g. item 501, 1501) extend in a substantially horizontal manner, or plane, across the face. In some configurations, the prong may be configured to allow the interface to be suitably fitted for engagement in or with the nare when rotated about 180 degrees and as such can be considered to be orientation-independent when being positioned on the patient's face while remaining attached to a support (e.g. support 500) or without being disconnected, detached or decoupled from a support (e.g. support 500). In some configurations, the prong or interface may be configured to allow the prong to be interchangeably fitted in or with a left or right nare of a patient while allowing the prong to remain attached to a support (e.g. support 500) or

without being detached from a support (e.g. support 500), for example the prong is translatable relative to the support or if the prong is located in a fixed position relative to the support, the interface can be flipped to position the prong in or with the desired nare.

[0217] The respiratory interface as described herein may comprise a conduit to transport gases to a prong. The conduit may be an unheated, breathable conduit. The conduit may allow some water vapour to escape through the walls of the conduit. The breathable conduit may allow excess water vapour to escape from the gases flow to prevent condensation within the conduit. The conduit may comprise a breathable wall or may comprise breathable sections within the wall of the conduit.

[0218] In an alternative configuration the conduit may comprise a heater wire positioned within the conduit. The heater wire may be located in the lumen of the conduit or alternatively may be integrated into the wall of the conduit. The heater wire is configured to heat the gases within the conduit.

[0219] In one aspect, there is provided a respiratory interface for providing gases to a user, the respiratory interface comprising :

a single nasal prong, the single nasal prong comprising

a seal body configured to seal with one of the nostrils (i.e. nares) of the user, the seal body comprising an arcuate wall defining a gases passage,

an inlet configured to receive gases into the seal body,

an outlet configured to supply gases to the nostril of the user,

the inlet and the outlet defined in the seal body,

the outlet located in a central location on the seal body when viewed from the top of the interface.

[0220] The respiratory interface comprises a headgear, the headgear configured to mount the interface on a user's head in an operation position, and the respiratory interface comprises a gases supply conduit in fluid communication with the single nasal prong to provide gases to the prong. The operation position of the interface is when the single prong is inserted into a nostril of the user.

[0221] The outlet located in a central location relative to the outer profile of the prong when viewed from the top.

[0222] The outlet is positioned in a central location relative to a left surface, a right surface, front surface and rear surface of the seal body.

[0223] The outlet is symmetrical about a vertical plane extending from front to back of the prong, and extending through the outlet. The outlet is symmetrical about a vertical plane extending from left to right of the prong and extending through the outlet.

[0224] The outlet may be symmetrical about a vertical and a horizontal axis of the prong.

[0225] The outlet being centrally located allows the prong to be independent of nostril directionality or orientation. The outlet being centrally located on the seal body allows the prong to be used with a left nostril or right nostril of the user. As noted previously, the prong can be positioned or located on the patient's face in two different orientations. That is, the interface could itself be rotated 180 degrees and still appropriately fit the patient for suitable prong engagement with a patient's nare.

[0226] The arcuate wall comprises a supple region and a stiff region, the supple region extending away from the stiff region and the supple region of the arcuate wall configured to flex or elastically deform to conform to a user's nostril to form a seal with the nostril.

[0227] The respiratory interface comprises a cuff and the prong being connected to the cuff.

[0228] The respiratory interface comprising a conduit and a conduit connector, the conduit being coupled to the conduit connector, the cuff connected to the conduit connector and the prong.

[0229] The cuff is configured to facilitate fluid coupling between the conduit connector and the prong such that gases flow from the conduit to the prong through the conduit connector.

[0230] The respiratory interface comprises a support, the prong being supported by the support configured to allow the prong to translate along the support relative to the nostrils of the user.

[0231] The support comprises one or more sliding members and a clip arranged at either end of the sliding member. The headgear clip configured to engage with a

corresponding clip coupled to a headgear strap. The headgear strap is used to mount the

interface on a user's face in an operative position. Alternatively, the support comprises one or more sliding members and the headgear strap may be directly attached or connected to an end of the sliding member. For example, the headgear strap may be welded or adhered or otherwise attached directly to the sliding member, or threaded directly into the buckle without clips.

[0232] The one or more sliding members extend laterally. In one form, the support comprises a pair of sliding members, the pair of sliding members arranged parallel to each other. The sliding members terminate in a headgear clip at opposing ends of the sliding members.

[0233] The cuff is engaged to the support and moveable along the support relative to the support. In use, the cuff is moveable relative to the nose and/or face of the user.

[0234] In one aspect there is provided a respiratory interface comprising :

a single nasal prong configured to engage and at least partially occlude a nostril of a user,

a conduit in fluid communication with the single nasal prong to provide respiratory gases to the single nasal prong,

a cuff, the cuff connected to the prong and connected to the conduit,

a headgear configured to mount the interface onto the head of the patient,

wherein the interface provides respiratory gases at a flow rate that causes dead space clearance within the user's airways and creates an expiratory airway pressure within the airways of the patient.

[0235] The respiratory interface is configured to provide respiratory gases at a flow rate where the respiratory gases flush carbon dioxide or expired gases from within the airways of the patient.

[0236] The respiratory interface is configured to provide respiratory gases at a flow rate such that the respiratory gases reach the nasopharynx and/or the oropharynx. The flow of respiratory gases being delivered through a single nostril while the other nostril remains unoccluded and provides an expiratory gases pathway to allow expired gases to escape as they are flushed out.

[0237] The respiratory interface is configured to provide gases at a flow rate that equals or exceeds peak inspiratory demand. Alternatively, the respiratory interface provides gases at a flow rate that is less than the peak inspiratory demand of the user, while still providing flushing, dead space clearance and some expiratory airway pressure.

[0238] In another aspect, there is provided a medical tube component comprising

a conduit connector and a cuff,

said conduit connector comprising a thread, said thread comprising at least one region of discontinuity,

and wherein said cuff comprises at least one protrusion configured to interact with said region of discontinuity when brought into engagement with said conduit in a first direction, and

said at least one protrusion is configured to engage with at least a portion of said thread beyond, or away from, said region of discontinuity when brought into engagement with said thread in a second direction.

[0239] The first direction may be provided by application of a first force or first movement.

[0240] The said second direction may be provided by application of a second force or second movement.

[0241] The first and second directions may be different.

[0242] The first and second directions may be substantially transverse with respect to each other.

[0243] The first direction may be substantially aligned with an axial direction of the conduit connector.

[0244] The second direction may be substantially transverse to said axial direction of the conduit connector.

[0245] The second direction may be a rotation for engaging said at least one protrusion upon said thread.

[0246] The second direction may be an axial rotation of the cuff with respect to the axial direction of said conduit.

[0247] The protrusion may engage or becomes engaged with said thread once moved in said second direction.

[0248] The protrusion may be configured to engage with said thread to at least partially restrain or lock the cuff to or upon the conduit connector upon application of a force or movement in the second direction.

[0249] Once engaged, the protrusion may substantially restrain or inhibit relative axial movement or displacement of the cuff and conduit connector with respect to each other.

[0250] The cuff may be rotated greater than about 5° from said region of

discontinuity.

[0251] The cuff may be rotated greater than about 10° from said region of discontinuity.

[0252] The cuff may be rotated from about 10° to about 160° from said region of discontinuity.

[0253] The cuff may be rotated about 90° from said region of discontinuity.

[0254] The cuff may be rotated greater than about 170° from said region of discontinuity.

[0255] An opening of said cuff may be of an inner diameter that is greater than an outer diameter of said conduit connector.

[0256] The cuff may comprise a plurality of said protrusions.

[0257] The cuff may comprise two or more protrusions.

[0258] The thread may comprise of a plurality of said discontinuous regions.

[0259] The thread may comprise two or more, or a plurality of said discontinuous regions.

[0260] The number of discontinuous regions and the number of protrusions may be matched or equal to each other.

[0261] The cuff may be rotated about 90° from said discontinuous regions.

[0262] A nasal prong may be connectable to said conduit connector.

[0263] A nasal prong may be connected to said conduit connector.

[0264] The cuff may abut or contact a portion of said nasal prong when said cuff is substantially engaged with said thread.

[0265] The nasal prong or a part thereof may be formed of a relatively soft or substantially compliant material.

[0266] The cuff may at least partially compress a portion of said nasal prong when said cuff is engaged with said thread.

[0267] A portion of said nasal prong may be at least partially compressed upon engagement of said cuff with said thread.

[0268] A friction-fit type engagement of said cuff with said nasal prong may be provided upon engagement of said cuff with said thread.

[0269] The cuff may be removably attached to said conduit connector.

[0270] The cuff may be detachable from said conduit connector.

[0271] The cuff may be engageable with a first thread of said conduit connector.

[0272] The cuff may be engageable with a first thread portion and a second thread portion of said conduit connector.

[0273] The protrusion(s) may engage said thread portion distal from a terminal end of the conduit connector.

[0274] The protrusion(s) may engage with a portion of said thread proximal to an end of the conduit connector connectable with the nasal prong.

[0275] The protrusion(s) may engage a portion of the thread closest to, or

substantially adjacent to, the nasal prong such that said conduit is thread mountable or thread connectable with the conduit connector threads adjacent the cuff.

[0276] The protrusion may be a tab.

[0277] The protrusion may be a substantially radially inwardly extending projection. [0278] The discontinuity region may provide for a predetermined width of discontinuity sufficient to receive or accommodate a width of a protrusion, such that the width of the protrusion is less than the width of the discontinuity.

[0279] The thread may be a substantially helical thread.

[0280] A conduit may be substantially engaged with said conduit connector by rotating or winding of said conduit upon said thread.

[0281] The conduit may be substantially engaged with said conduit connector subsequent to said cuff being brought into engagement with said thread.

[0282] The protrusion once engaged with said thread, may be brought into thread engagement by locating of said protrusion to within a region between adjacent winds of said thread, or a region adjacent to a wind of said thread and a flange of said conduit connector.

[0283] The flange may be a stopping flange.

[0284] The flange may act as a barrier to the cuff being over-wound or for the cuff to be brought to bear upon said flange.

[0285] The cuff may provide for a shank portion upon which said protrusion(s) are located radially inwardly thereof of an inner wall of said cuff, said shank portion being of a longitudinal length sufficient to locate said protrusion(s) in a region adjacent to a wind of said thread or within a region between adjacent winds of said thread.

[0286] The cuff may be held in a predetermined orientation or position by a

compression fit between each of:

i) a terminal end of said conduit once said conduit is substantially engaged with said thread of said conduit connector, and

ii) by a base of said nasal prong once said nasal prong is substantially engaged with said cuff.

[0287] There is provided a strap attachment for terminating a headstrap, the strap attachment comprising : a substantially hollow body comprising of internal walls to define a channel therebetween, the substantially hollow body comprising of a mouth end and a terminal end, the mouth end defining an opening into the channel and for receiving a free end of a headstrap, and the terminal end defining an end of the channel substantially distal of the mouth end, the channel providing for a pathway extending between the mouth end and the terminal end through which said headstrap is to be threaded, at least one first projection extending from a base attached to said internal wall to a tip in a direction substantially towards an opposing internal wall or into the channel defined by at least an opposing side wall, wherein the tip is configured to engage at least a portion or a surface of a headstrap to be received within said channel, said tip configured to substantially permit the headstrap to be threaded in a direction into the channel and along the pathway from the mouth end to the terminal end and said tip configured to substantially resist the headstrap from being removed or withdrawn from the channel in a direction extending from the terminal end towards the mouth end of said substantially hollow body, and wherein the tip of the at least one first projection is disposed so as to be spaced off from said opposing internal wall by a pre-determined distance, said pre-determined distance being a function of a thickness of a headstrap to be received within the channel.

[0288] Optionally, a ratio of pre-determined distance to the thickness of the headstrap ranges from 1 :4 to 1 : 1.

[0289] Optionally, the pre-determined distance is less than the thickness of the headstrap to be received within the channel.

[0290] Optionally, the tip comprises a substantially pointed end or an apex.

[0291] Optionally, the at least one first projection comprises a leading side and a trailing side, the leading side and trailing side extending from the base to the tip of the at least one first projection, and positioned in a direction substantially along the pathway from the mouth end to the terminal end.

[0292] Optionally, the leading side and trailing side are configured such that the at least one first projection forms a substantially hook shaped projection.

[0293] Optionally, the trailing side comprises an acute angle with respect to the internal wall.

[0294] Optionally, the acute angle is about 40 degrees to about 80 degrees.

[0295] Optionally, further comprising at least one second projection, extending from the opposing internal wall into the channel.

[0296] Optionally, further comprising a plurality of first projections forming a first projection set, and a plurality of second projections forming a second projection set.

[0297] Optionally, projections of the first projection set are substantially aligned with projections of the second projection set.

[0298] Optionally, wherein projections of the first projection set are substantially non-aligned or offset with projections of the second projection set.

[0299] Optionally, projections of the first projection set and projections of the second projection set are substantially laterally offset from each other with respect to a lateral direction across the width of said channel, said width direction being substantially perpendicular to an insertion direction of said headstrap.

[0300] Optionally, projections of the first projection set and projections of the second projection set are substantially alternating in extend of length.

CLAIMS

1. A respiratory support system, comprising :

a gases flow source configured to provide a gases flow at a high flow rate to a patient,

a patient interface comprising a single sealing nasal prong configured to deliver the gases flow at the high flow rate to the patient, and

wherein the single sealing nasal prong is adapted to substantially seal with a single nare of two nares of the patient.

2. The respiratory support system of claim 1, wherein the patient interface is configured to increase expiratory pressure in the patient's airway.

3. The respiratory support system of claim 1 or claim 2, wherein the single sealing nasal prong comprises:

a seal body configured to seal the single nare of a patient, the seal body having opposing front and rear surfaces, and opposing left and right surfaces, the opposing front and rear surfaces being substantially symmetrical to each other,

an inlet configured to receive gases,

an outlet configured to supply the gases to the patient, the outlet located in a generally central location between the left and right surfaces such that the single sealing nasal prong can seal either one of the patient's nares,

wherein the seal body and the outlet of the single sealing nasal prong are arranged such that one of the patient's nares is substantially sealed and gases are supplied to that nare from the outlet while the other of the patient's nares is unsealed and is free from direct gases supply from the outlet.

4. The respiratory support system of claim 1 or claim 2, further comprising a gases delivery assembly having :

the single sealing nasal prong with a seal body configured to seal with the single nare of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient,

a conduit directly coupled to the single sealing nasal prong and in fluid communication with the single sealing nasal prong, and

headgear connected to, or connectable to, the gases delivery assembly.

5. The respiratory support system of claim 1 or claim 2, further comprising a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

the single sealing nasal prong having a seal body configured to seal with the single nare of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient; and

a conduit having an outlet configured to supply the gases to the single sealing nasal prong, the conduit being coupled with, or couplable with, the single sealing nasal prong such that the conduit outlet is coaxial with the single sealing nasal prong inlet.

6. The respiratory support system of claim 1 or claim 2, further comprising a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

the single sealing nasal prong having a seal body configured to seal with the single nare of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient; and

an adjuster configured to allow the single sealing nasal prong to be removable from first nare and positioned in the patient's other nare to seal with the other nare without the single sealing nasal prong being detached from the respiratory interface.

7. The respiratory support system of claim 1 or claim 2, further comprising a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a body with a pair of side arms configured to provide stability for the interface on the cheeks of the patient;

the single sealing nasal prong;

a manifold having a single sided inlet to receive gases from a gas source, and an outlet that delivers gases to the single sealing nasal prong;

wherein the single sealing nasal prong is arranged such that one of the patient's nares is substantially sealed and gases are supplied to that nare from the outlet while the other of the patient's nares is unsealed and is free from direct gases supply from the outlet.

8. The respiratory support system of claim 1 or claim 2, further comprising a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

the single sealing nasal prong having a seal body configured to seal with the single nare of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient;

a support for the single sealing nasal prong, the single sealing nasal prong being translatable relative to the support, the single sealing nasal prong to be interchangeably received by the patient's nares, the single sealing nasal prong remaining coupled to the support; and

headgear connected to, or connectable to, the support.

9. The respiratory support system of claim 1 or claim 2, further comprising a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

the single sealing nasal prong having a seal body configured to seal with the single nare of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient; and

a cuff comprising a prong coupling portion;

wherein the single sealing nasal prong is received by, or receivable by, the prong coupling portion of the cuff.

10. The respiratory support system of claim 1 or claim 2, wherein the single sealing nasal prong comprises:

an inlet configured to receive gases;

an outlet configured to supply the gases to the patient, the outlet having a generally oval cross-section;

a seal body having a wall defining an exterior of the single sealing nasal prong, the exterior of the single sealing nasal prong being outwardly curved and tapering inwardly from an inlet end toward an outlet end;

the wall defining a gases passage between the inlet and the outlet;

wherein gases flowing through the gases passage causes the exterior of the single sealing nasal prong to seal with the single nare of a patient.

11. The respiratory support system of any one of claims 1 to 10, further comprising a humidifier configured to heat and humidify the gases flow to be provided to the patient.

12. The respiratory support system of claim 11, wherein the humidifier comprises a humidification chamber, the humidification chamber comprising :

a gases inlet to receive the gases flow from the gases flow source, and

a gases outlet to deliver humidified gases flow to the patient interface.

13. The respiratory support system of claim 11 or claim 12, further comprising an inspiratory conduit located between the humidifier and the patient interface, the inspiratory conduit configured to deliver the humidified gases flow to the patient interface.

14. The respiratory support system of any one of claims 11 to 13, wherein the humidifier comprises a humidification chamber removably connected to a humidifier base unit.

15. The respiratory support system of any one of claims 12 to 14, wherein the humidification chamber is configured to be filled with a humidification liquid for the humidification of the gases flow to the patient, optionally wherein the humidification liquid is water.

16. The respiratory support system of any one of claims 12 to 15, wherein the humidification chamber comprises a heat conductive base.

17. The respiratory support system of any one of claims 16, wherein the humidifier base unit comprises a heater plate, and the heat conductive base allows the heating of the humidification liquid in the chamber when in contact with the heater plate of the humidifier base unit.

18. The respiratory support system of any one of claims 14 to 17, wherein the flow source and humidifier base unit are integral.

19. The respiratory support system of any one of claims 13 to 18, wherein the inspiratory conduit is a heated inspiratory conduit.

20. The respiratory support system of any one of claims 13 to 19, further comprising a patient conduit located between the inspiratory conduit and the patient interface, wherein the patient conduit is formed of breathable material.

21. The respiratory support system of any one of claims 1 to 20, wherein the high flow rate comprises a gases flow to be delivered to the patient of at least 20L/min.

22. The respiratory support system of any one of claims 1 to 21, wherein the high flow rate comprises a gases flow to be delivered to the patient of up to about 70L/min.

23. The respiratory support system of any one of claims 1 to 22, wherein the gases flow comprises a set gas flow rate.

24. The respiratory support system of any one of claims 1 to 23, further comprising a headgear to retain the patient interface on the patient's face.

25. The respiratory support system of any one of claims 1 to 24, further comprising a respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

the single sealing nasal prong further comprising:

an inlet configured to receive gases;

an outlet configured to supply the gases to the patient; and a seal body having a wall defining an exterior of the single sealing nasal prong;

the seal body and the outlet of the single sealing nasal prong being arranged such that one of the patient's nares is substantially sealed and gases are supplied to that nare from the outlet while the other of the patient's nares is unsealed and is free from direct gases supply from the outlet; and

wherein the respiratory interface is configured to provide respiratory flow therapy to the patient through the single sealing nasal prong, and.

26. The respiratory support system of claim 25, wherein the wall defines the inlet, the outlet and the seal body.

27. The respiratory support system of claim 25 or claim 26, wherein a wall thickness is about 0.7mm to about 0.8mm.

28. The respiratory support system of any one of claims 25 to 27, wherein a cross-section of the prong outlet is generally oval.

29. The respiratory support system of claim 28, wherein the cross-section of the prong outlet is elliptical.

30. The respiratory support system of any one of claims 25 to 29, wherein the cross-section of the outlet has a semi-minor radius of about 1mm to about 3mm and a semi major radius of about 5mm to about 10mm.

31. The respiratory support system of claim 30, wherein the semi-minor radius is about 2mm and the semi-major radius is about 7mm.

32. The respiratory support system of any one of claims 25 to 31, wherein the seal body tapers inwardly from the inlet towards the outlet.

33. The respiratory support system of any one of claims 25 to 32, wherein a cross-sectional area of the prong outlet is smaller than a cross-sectional area of the prong inlet.

34. The respiratory support system of any one of claims 1 to 33, wherein the single sealing nasal prong is configured to provide expiratory pressure between 3.5cmH20 and 20cmH2O.

35. The respiratory support system of any one of claims 25 to 34, wherein an exterior of the seal body tapers inwardly from an inlet end toward an outlet end.

36. The respiratory support system of any one of claims 25 to 35, wherein an exterior of the seal body is outwardly curved.

37. The respiratory support system of any one of claims 1 to 36, wherein the gases flow rate is controlled to generate desired pressures on patient inspiration and expiration.

38. The respiratory support system of claim 37, wherein the gases flow rate is lowered upon patient expiration to lower the expiratory pressure.

39. The respiratory support system of any one of claims 1 to 38, wherein the system is configured such that the expiratory airway pressure is about 5 - 8 cmH20.

40. The respiratory support system of any one of claims 25 to 39, wherein the outlet is configured such that gases delivered from the outlet causes washout of dead space gases through the unsealed nare.

41. The respiratory support system of any one of claims 1 to 40, wherein the single nasal prong is interchangeable between nares.

42. The respiratory support system of any one of claims 1 to 41, further comprising one or more sliding members, the sliding members configured to allow nasal prong adjustment independently from headstrap adjustment.

43. The respiratory support system of any one of claims 1 to 42, further comprising a conduit configured to deliver gases directly to the single sealing nasal prong without passing through another component.

44. The respiratory support system of claim 43, wherein a cross section of the prong inlet is substantially similar to a cross section of the conduit outlet.

45. The respiratory support system of claim 43 or claim 44, wherein a cross section of the inlet is substantially similar to a cross section of the conduit proximal the patient.

46. The respiratory support system of any one of claims 43 to 45, wherein a gases path from the conduit to the prong outlet is substantially linear.

47. The respiratory support system of any one of claims 43 to 46, wherein the single sealing nasal prong and the conduit form a continuous gases pathway.

48. The respiratory support system of any one of claims 43 to 47, wherein the single sealing nasal prong and the conduit form a direct fluid coupling.

49. A respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a single sealing nasal prong, the single sealing nasal prong comprising :

a seal body configured to seal with one of the nares of a patient, the seal body having opposing front and rear surfaces, and opposing left and right surfaces, the opposing front and rear surfaces being substantially symmetrical to each other,

an inlet configured to receive gases,

an outlet configured to supply the gases to the patient, the outlet located in a generally central location between the left and right surfaces such that the single sealing nasal prong can seal either one of the patient's nares,

wherein the seal body and the outlet of the single sealing nasal prong are arranged such that one of the patient's nares is substantially sealed and gases are supplied to that nare from the outlet while the other of the patient's nares is unsealed and is free from direct gases supply from the outlet.

50. The respiratory interface according to claim 49, further comprising a gases delivery assembly, the gases delivery assembly comprising the single sealing nasal prong.

51. The respiratory interface according to claim 49 or claim 50, wherein the gases delivery assembly further comprises a conduit connected to, or connectable to the single sealing nasal prong.

52. The respiratory interface according to claim 49 or claim 51, further comprising headgear connected to, or connectable to, the gases delivery assembly.

53. A respiratory interface for delivering gases to a single nare of a patient, the respiratory interface consisting of:

a gases delivery assembly having :

a single sealing nasal prong with a seal body configured to seal with one of the nares of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient,

a conduit directly coupled to the single sealing nasal prong and in fluid communication with the single sealing nasal prong, and

headgear connected to, or connectable to, the gases delivery assembly.

54. A respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a gases delivery assembly, the gases delivery assembly consisting of:

a single sealing nasal prong having a seal body configured to seal with one of the nares of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient;

a conduit directly coupled to the single sealing nasal prong and in fluid communication with the single sealing nasal prong, and

headgear connected to, or connectable to, the gases delivery assembly.

55. A respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a frameless gases delivery assembly comprising :

a single sealing nasal prong having a seal body configured to seal with one of the nares of a patient, the single sealing nasal prong having an inlet configured to receive gases, and an outlet configured to supply the gases to the patient;

a conduit in fluid communication with the single sealing nasal prong; and headgear connected to, or connectable to, the gases delivery assembly.

56. The respiratory interface according to any one claims 52 to 55, wherein the headgear is directly connected to the gases delivery assembly.

57. The respiratory interface according to any one claims 52 to 56, wherein the headgear is directly connected to the single sealing nasal prong.

58. The respiratory interface according to any one claims 52 to 55, wherein the headgear is directly connected to the conduit.

59. The respiratory interface according to any one of claims 51 to 58, wherein a gases path from the conduit to an outlet of the single sealing nasal prong is substantially linear. 60. The respiratory interface according to any one of claims 49 to 59, wherein the seal body comprises a wall defining the inlet, the outlet and the seal body.

61. The respiratory interface according to claim 60, wherein the wall thickness is about 0.7mm to about 0.8mm.

62. The respiratory interface according to any one of claims 49 to 61, further comprising an adjuster configured to decouple the single sealing nasal prong from tension when it is moved from one nare to the other while still allowing the headgear to maintain the headgear retention force.

63. The respiratory interface according to claim 62, wherein the adjuster comprises a support.

64. The respiratory interface according to claim 63, wherein the support is, or comprises, one or more sliding members.

65. The respiratory interface according to claim 63 or claim 64, wherein the support is, or comprises, a flexible portion.

66. The respiratory interface according to any one of claims 49 to 65, wherein the adjuster is coupled to a cuff that supports the single sealing nasal prong, in between, or as an intermediate component of, the headgear arrangement.

67. The respiratory interface according to any one of claims 49 to 66, further comprising a clip configured to removably fasten the conduit to another item associated with patient.

68. The respiratory interface according to any one of claims 49 to 67, wherein the outlet is located in a generally central location between the front and rear surfaces.

69. The respiratory interface according to any one of claims 49 to 68, wherein the opposing left and right surfaces are substantially symmetrical to each other.

70. The respiratory interface according to any one of claims 49 to 69, wherein the single sealing nasal prong is pivotable about an axis such that it is orientable to fit either of the patient's nares.

71. The respiratory interface according to any one of claims 49 to 70, wherein the single sealing nasal prong comprises a rigid portion connected to, or connectable to, the gas flow assembly.

72. The respiratory interface according to claim 71, wherein rigid portion provides stability for the single sealing nasal prong relative to the gas flow assembly.

73. The respiratory interface according to any one of claims 49 to 72, wherein a wall thickness of the rigid portion is about 1.5mm to about 4mm.

74. The respiratory interface according to any one of claims 49 to 73, wherein the single sealing nasal prong comprises a supple portion configured to substantially conform to shape of the patient's nare.

75. A respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a single sealing nasal prong having a seal body configured to seal with one of the nares of a patient, an inlet configured to receive gases, and an outlet configured to supply the gases to the patient;

a support for the single sealing nasal prong, the single sealing nasal prong being translatable relative to the support, the single sealing nasal prong to be interchangeably received by the patient's nares, the single sealing nasal prong remaining coupled to the support; and

headgear connected to, or connectable to, the support.

76. The respiratory interface according to claim 75, wherein the support comprises a sliding member.

77. The respiratory interface according to claim 75 or claim 76, the support comprises two sliding members.

78. The respiratory interface accordingly to claim 76 or 77, wherein the sliding member(s) is/are formable or conformable such that the sliding member(s) substantially follow or accommodate a contour of a patient's face.

79. The respiratory interface according to claim 76 or claim 77, wherein the sliding member(s) comprise a pre-formed profile.

80. The respiratory interface accordingly to claim 79, wherein said pre-formed profile comprises a pre-curve or radiused profile comprising a curve or a profile that substantially follows or accommodates a contour of a patient's face or wherein said curve or profile is substantially convex with respect to a patient's face.

81. The respiratory interface according to claim 79 or claim 80, wherein the pre-formed profile comprises one or more of: a radius of about 120° of a circle, about one third of a circle, an arc-shaped configuration.

82. The respiratory interface according to any one of claims 79 to 81, wherein the pre formed profile comprises a radius length and/or pre-curve length of about 70mm to about 110mm.

83. The respiratory interface according to claim 82, wherein the pre-curved or radiused profile comprises a radius length or pre-curve length of about 90mm.

84. The respiratory interface according to any one of claims 75 to 83, further comprising clips at end portions of sliding member(s) coupled to, or couplable with, headgear.

85. The respiratory interface according to any one of claims 75 to 84, wherein the strap(s) are coupled to, or couplable to, the single sealing nasal prong.

86. The respiratory interface according to any one of claims 74 to 85, wherein the straps are removably coupled to the single sealing nasal prong.

87. The respiratory interface according to any one of claims 74 to 86, wherein the headgear is a single strap or a bifurcated strap.

88. The respiratory interface according to any one of claims 74 to 87, wherein at least one terminal end of the headgear comprises a strap attachment.

89. The respiratory interface according to claim 88, wherein the strap attachment comprises:

a substantially hollow body comprising of internal walls to define a channel therebetween,

the substantially hollow body comprising of a mouth end and a terminal end, the mouth end defining an opening into the channel and for receiving a free end of a headstrap, and the terminal end defining an end of the channel substantially distal of the mouth end, the channel providing for a pathway extending between the mouth end and the terminal end through which said headstrap is to be threaded,

at least one first projection extending from a base attached to said internal wall to a tip in a direction substantially towards an opposing internal wall or into the channel defined by at least an opposing side wall,

wherein the tip is configured to engage at least a portion or a surface of a headstrap to be received within said channel, said tip configured to substantially permit the headstrap to be thread in a direction into the channel and along the pathway from the mouth end to the terminal end and said tip configured to substantially resist the headstrap from being removed or withdrawn from the channel in a direction extending from the terminal end towards the mouth end of said substantially hollow body, and

wherein the tip of the at least one first projection is disposed so as to be spaced off from said opposing internal wall by a pre-determined distance, said pre-determined distance being a function of a thickness of a headstrap to be received within the channel.

90. The respiratory interface according to claim 88, wherein the strap attachment comprises:

two or more walls defining a channel, the channel configured to receive an end of a headstrap,

a first projection set comprising at least one first projection extending from a first wall of the strap attachment and substantially towards or into the channel, the first projection comprising a distal end configured to engage a portion of the headstrap and prevent the end of the headstrap received in the channel, from being removed from the channel,

wherein the distal end of the first projection is spaced at a distance from a second opposing wall of the channel, and

wherein the distance is provided as a function of a thickness of the headstrap to be received in the channel.

91. The respiratory interface according to claim 88, wherein the strap attachment comprises:

two or more walls defining a channel, the channel configured to receive an end of a headstrap,

a first projection set comprising at least one first projection,

a second projection set comprising at least one second projection, and

wherein the first projection set and the second projection set extend from opposing walls of the strap attachment into the channel,

wherein the at least one first projection of the first projection set and the at least one second projection of the second projection set comprise distal ends configured to engage a portion of a headstrap and prevent removal of an end of the headstrap received in the channel, and

wherein the distal ends of the at least one first and second projections taper to, or comprise of, a pointed end or apex.

92. The respiratory interface according to claim 88, wherein the strap attachment comprises:

two or more walls defining a channel, the channel configured to receive an end of a headstrap,

a first projection set comprising at least one first projection,

a second projection set comprising at least one second projection, and

wherein the first and second projection sets define a curved or tortuous path through which the end of the headstrap is to be received,

wherein the at least one first projection of the first projection set and the at least one second projection of the second projection set comprise a distal end to engage a portion of the headstrap and prevent removal of an end of the headstrap received in the channel, and

wherein the distal ends of the at least one first and second projections taper to, or comprise of, a pointed end or apex.

93. The respiratory interface according to any one of claims 88 to 92, wherein the strap attachment comprises a strap termination, or a ferrule.

94. The respiratory interface according to claim 93, wherein the at least one terminal end of the headgear is received within a channel of the strap attachment, and wherein, once received, the at least one terminal end of the headgear follows a defined pathway, optionally such as a substantially tortuous path, within the channel of the strap attachment.

95. The respiratory interface according to claim 94, wherein the strap attachment comprises a plurality of projections, the plurality of projections comprising a first projection set and a second projection set, and wherein the first and second projection sets are arranged on opposing sides of the channel.

96. The respiratory interface according to claim 95, wherein the first projection set and second projection set are arranged to be offset, optionally such as being laterally offset, from each other in an opposing configuration.

97. The respiratory interface according to claim 95 or claim 96, wherein the projections are configured to extend towards an end of the strap attachment opposite a headstrap insertion end of the strap attachment.

98. The respiratory interface according to claim 97, wherein at least one projection tapers towards a pointed end or tip or apex.

99. The respiratory interface according to claim 98, wherein said strap attachment comprises of a mouth through which said headgear is to be inserted into said channel.

100. The respiratory interface according to claim 99, wherein said mouth comprises lead-in features.

101. The respiratory interface according to claim 100, wherein said lead-in features comprises substantially rounded lips for accommodating or receiving said headgear.

102. The respiratory interface according to any one of claims 75 to 101, wherein the seal body has opposing left and right surfaces, and the prong outlet is centred between the left and right surfaces such that the single sealing nasal prong can be adjusted to seal in either one of the nares providing therapy to the patient.

103. The respiratory interface according to claim 102, wherein the seal body has opposing front and rear surfaces, and the prong outlet is centred between the front and rear surfaces such that the single sealing nasal prong can be inserted independently of vertical orientation.

104. A single sealing nasal prong comprising :

an inlet configured to receive gases;

an outlet configured to supply the gases to the patient, the outlet having a generally oval cross-section;

a seal body having a wall defining an exterior of the single sealing nasal prong, the exterior of the single sealing nasal prong being outwardly curved and tapering inwardly from an inlet end toward an outlet end;

the wall defining a gases passage between the inlet and the outlet;

wherein gases flowing through the gases passage causes the exterior of the single sealing nasal prong to seal with one of the nares of a patient.

105. The single sealing nasal prong according to claim 104, wherein a cross-sectional area of the prong outlet is smaller than a cross-sectional area of the prong inlet.

106. The single sealing nasal prong according to any one of claims 104 to 105, wherein the seal body and the outlet of the single sealing nasal prong are arranged such that one of the patient's nares is substantially sealed and gases are supplied to that nare from the outlet while the other of the patient's nares is unsealed and is free from direct gases supply from the outlet.

107. The single sealing nasal prong according to any one of claims 104 to 106, wherein the seal body comprises a wall defining the inlet, the outlet and the seal body.

108. The respiratory interface according to claim 107, wherein the wall thickness is about 0.7mm to about 0.8mm.

109. The single sealing nasal prong according to any one of claims 104 to 108, wherein the prong has a sealing portion and a coupling portion.

110. The single sealing nasal prong according to any one of claims 104 to 109, wherein the coupling portion is more rigid than the sealing portion.

111. The single sealing nasal prong according to any one of claims 104 to 110, wherein the coupling portion has a lip engaged with, or engageable with, the conduit cuff.

112. The single sealing nasal prong according to any one of claims 104 to 111, wherein the lip has an undercut to receive the groove from the conduit part.

113. The single sealing nasal prong according to any one of claims 104 to 112, wherein the prong outlet is positioned relative to the prong body such that the prong can be adjusted to seal in either one of the nares providing therapy to the user.

114. The single sealing nasal prong according to any one of claims 104 to 113, wherein the single sealing nasal prong is interchangeable between the user's nares.

115. The single sealing nasal prong according to any one of claims 104 to 114, wherein the single sealing nasal prong is configured to provide expiratory airway pressure between 3.5cmH20 and 20cmH2O.

116. The single sealing nasal prong according to any one of claims 104 to 115, wherein a cross section of the prong inlet is substantially similar to a cross section of the conduit outlet.

117. The single sealing nasal prong according to any one of claims 104 to 116, wherein a ratio of the length of the single sealing nasal prong to the width of the single sealing nasal prong is about 1.52 to about 1.59.

118. The single sealing nasal prong according to any one of claims 104 to 117, wherein a ratio of a cross sectional area of the prong outlet to a cross sectional area of a conduit outlet 305 is about 0.72.

119. The single sealing nasal prong according to any one of claims 104 to 118, wherein a ratio of a cross sectional area of the prong outlet to a cross-sectional area of a base of the seal is about 0.33.

120. The single sealing nasal prong according to any one of claims 104 to 119, wherein the prong outlet is generally centred in conduit outlet.

121. The single sealing nasal prong according to any one of claims 104 to 120, wherein the single sealing nasal prong comprises a supple sealing portion.

122. The user interface according to any one of claims 104 to 121, wherein the single sealing nasal prong comprises a rigid coupling portion.

123. The user interface according to claim 122, wherein a wall thickness of the rigid coupling portion is about 1.5mm to about 4mm.

124. The single sealing nasal prong according to any one of claims 104 to 123, wherein the prong outlet is centred in the prong body in a horizontal orientation such that the prong can be adjusted to seal in either one of the nares providing therapy to the user.

125. The single sealing nasal prong according to any one of claims 104 to 124, wherein the prong outlet is centred in the prong body in both a horizontal and vertical orientation such that the prong can be inserted independently of vertical orientation.

126. The single sealing nasal prong according to any one of claims 104 to 125, wherein the seal body is substantially symmetrical about a vertical axis.

127. The single sealing nasal prong according to any one of claims 104 to 126, wherein the seal body is substantially symmetrical about a horizontal axis.

128. A kit comprising :

a humidification chamber with a humidification inlet configured to couple to a flow source and a humidification outlet,

an inspiratory conduit with an inspiratory conduit inlet configured to couple to the humidification outlet and an inspiratory conduit outlet, and

a single sealing nasal prong configured to couple to the inspiratory conduit outlet.

129. The kit of claim 128, wherein the single sealing nasal prong is that of any one of claims 1 to 127.

130. The kit of claim 128 or claim 129, wherein the single sealing nasal prong further comprises a patient conduit, the patient conduit comprising an inlet configured to couple to the inspiratory conduit outlet.

131. The kit of claim 130, wherein the patient conduit is formed of a breathable material.

132. The kit of any one of claims 128 to 131, wherein the inspiratory conduit is heated. 133. The kit of any one of claims 128 to 132, further comprising a conduit clip configured to secure the inspiratory conduit to a patient or the surroundings of a patient.

134. The kit of any one of claims 128 to 133, wherein the humidification chamber is configured to be filled with a humidification liquid for the humidification of the gases flow to the patient, optionally the humidification liquid is water.

135. The kit of any one of claims 128 to 134, wherein the humidification chamber is removably connectable to a humidifier base unit.

136. The kit of claim 135, wherein the humidifier base unit is integral with the flow source.

137. The kit of any one of claims 128 to 136, wherein the humidification chamber comprises a heat conductive base and the humidifier base unit comprises a heater plate, wherein the heat conductive base allows the heating of the humidification liquid in the chamber when in contact with the heater plate of the humidifier base unit.

138. A respiratory interface for delivering gases to a single nare of a patient, the respiratory interface comprising :

a single sealing nasal prong having a seal body configured to seal with one of the two nares of a patient, a prong inlet configured to receive gases, and a prong outlet configured to supply the gases to the patient,

a support for the single sealing nasal prong, and

a conduit directly coupled to the single sealing nasal prong and in fluid

communication with the single sealing nasal prong,

wherein the single sealing nasal prong and/or the respiratory interface is configured to allow the prong to interchangeably seal in or with a left or right nare of the patient.

139. The respiratory interface according to claim 138, wherein the prong and/or respiratory interface is configured to allow the prong to interchangeably seal in or with a left or right nare of a patient while allowing the prong to remain attached to the support or without being detached from the support.

140. The respiratory interface according to claim 139, wherein the prong is located in a fixed position relative to the support.

141. The respiratory interface according to claim 139, wherein the prong is translatable relative to the support.

142. The respiratory interface according to any one of claims 138 to 141, wherein the support is outside of or separate from or does not form a part of the conduit or gases being supplied to the single sealing nasal prong.

143. The respiratory interface according to any one of claims 138 to 142, wherein the conduit is fluidly separated from the support, or wherein the support does not form a part of a gas path of gases being supplied to the single sealing nasal prong.

144. The respiratory interface according to any one of claims 138 to 143, wherein the conduit comprises a single conduit.

145. The respiratory interface according to any one of claims 138 to 144, further comprising a gases path from the conduit to the prong outlet, wherein the gases path is substantially linear.

146. The respiratory interface according to any one of claims 138 to 145, wherein a conduit outlet of the conduit is directly coupled to the prong inlet of the single sealing nasal prong, and wherein the conduit outlet and the prong outlet share a substantially common substantially central axis.

147. The respiratory interface according to any one of claims 138 to 146, further comprising a headgear removably connectable to the support.

148. The respiratory interface according to any one of claims 138 to 147, further comprising a cuff, the single sealing nasal prong configured to couple with the cuff.

149. The respiratory interface according to any one of claims 138 to 148, further comprising a conduit connector, the conduit configured to couple with the conduit connector.

150. The respiratory interface according to claim 149 when dependent on claim 148, wherein the conduit connector and the cuff are separate or integral components.

151. The respiratory interface according to claim 150, wherein the single sealing nasal prong comprises a substantially supple or substantially compliant material and the conduit connector and/or cuff comprises a substantially rigid material.