this present invention provides a wearer of nasal cannula apparatus the ability to reposition the fluid supply tubes to be oriented in a more comfortable position by adding lightweight flexible polymeric joints and / or malleable non - ferromagnetic metals to the nasal cannula apparatus as is described in the various aspects and embodiments of the inventions provided below . referring to fig1 , a first exemplary embodiment of the invention is shown in which a wearer 5 has comfortably positioned a nasal cannula apparatus away from the ears 60 . the nasal cannula apparatus includes a first fluid supply tube 20 which is joined to an inlet side of a first adjustment member 30 a . a first fluid supply tube segment 35 is joined to the outlet side of the first adjustment member 30 a at one end and is joined to an inlet side of a second adjustment member 30 b at the opposite end . a second fluid supply tube segment 50 is joined to the outlet side of the second adjustment member 30 be at one end and to a first inlet side of a nasal insufflating member 55 at its opposite end . likewise , a second fluid supply tube 15 is joined to an inlet side of a third adjustment member 30 c . a third fluid supply tube segment 40 is joined to the outlet side of the third adjustment member 30 c at one end and to an inlet side of a fourth adjustment member 30 d at the opposite end . a fourth fluid supply tube segment 45 is joined to the outlet side of the fourth adjustment member 30 d at one end and to a second inlet side of the nasal insufflating member 55 at its opposite end . in this embodiment of the invention , the first and second fluid supply tubes 20 , 15 are shown routed over the top the wearer &# 39 ; s head 5 and held in position by a retaining clip 25 depicted in fig1 a , 1 b . the diameters of the first and second fluid supply tubes 20 , 15 and the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 are generally equal and constructed of like polymeric materials to ensure a balanced fluid flow is delivered to the nasal insufflating member 55 . a larger diameter common fluid supply tube 10 delivers the fluid from a reservoir to the first and second fluid supply tubes 20 , 15 by way of a y - fitting 70 depicted in fig1 b . the first , second , third and fourth adjustment members 30 a , 30 b , 30 c , 30 d are coaxially joined to the first and second fluid supply tubes 20 , 15 and the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 so as to not interfere with the fluid supply being delivered to the wearer 5 . while four adjustment members 30 a , 30 b , 30 c , 30 d are shown in this figure , one skilled in the art will appreciate that fewer adjustment members could be used to allow the wearer to reposition the fluid supply tubes to achieve a more comfortable position . the polymeric construction materials of the first and second fluid supply tubes 20 , 15 , the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 and common fluid supply tube 10 are preferably of a thermo plastic such as polyvinyl chloride ( pvc ) having a sufficient plasticizer to allow flexibility and suppleness . pvc or other common thermo plastic polymers used in the current art are acceptable for use in the various components incorporated into the invention . additional construction materials may be incorporated or replace the polymeric construction of the first , second , third and fourth adjustment members 30 a , 30 b , 30 c , 30 d as described below . referring to fig2 a , a first embodiment of the invention is depicted . in this embodiment of the invention , a flow through adjustable bellows joint ( adjustment member ) 30 a is disposed into the nasal cannula invention at two or more of the adjustment member positions 30 a , 30 b , 30 c , 30 d depicted in fig1 . the bellows joint ( s ) 30 a are constructed with inlet 75 and outlet nozzles 80 for attachment to the first and second fluid supply tubes 20 , 15 , and / or the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 . the designation of inlet and outlet are used for convenience only . the adjustment members are intended to be simple flow - through devices which lack flow directivity restrictions . the adjustment members , as is depicted in fig2 b , are constructed of polymeric materials which are compatible with the polymeric construction materials of the first and second fluid supply - tubes 20 , 15 , and / or the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 . to achieve the necessary flexibility , positioning memory and structural integrity , a more rigid construction of polymer is used . for example , pvc having a reduced amount of plasticizer as is common used in the non - analogous art of drinking straws with flexible elbow joints . in one embodiment of the invention , depicted in fig2 c , the adjustment members 30 a are dimensioned to fit into the first and second fluid supply tubes 20 , 15 , and / or the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 . in this embodiment of the invention , the outer diameters of the inlet and outlet nozzles 75 , 80 are slightly larger than the inner diameters of the fluid supply tubing 35 , 20 . the resilient properties of the dimensionally expanded fluid supply tubing 35 , 20 forms sealed joints over the inlet and outlet nozzles 75 , 80 . this tubing coupling arrangement is commonly employed in the non - analogous art of aquarium aeration tubing . alternately , the inlet and outlet nozzles may be attached to the various fluid supply tubing using an adhesive . the various inner and outer diameters of the first and second fluid supply tubes 20 , 15 , the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 and / or the inlet and outlet nozzles 75 , 80 may be adjusted accordingly to optimize the fluid flow delivered to the nasal insufflating member 55 depicted in fig1 . in another related embodiment of the invention , depicted in fig2 d , the adjustment members 30 a are dimensioned to fit over the first and second fluid supply tubes 20 , 15 , and / or the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 . in this embodiment of the invention , the inner diameters of the inlet and outlet nozzles 75 , 80 are slightly smaller in diameter than the fluid supply tubing 35 , 20 . the resilient properties of the dimensionally compressed fluid supply tubing 35 , 20 forms sealed joints within the inlet and outlet nozzles 75 , 80 . alternately , the inlet and outlet nozzles 75 , 80 may be attached to the various fluid supply tubing using an adhesive . as before , the various diameters of the first and second fluid supply tubes 20 , 15 , the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 and / or the inlet and outlet nozzles 75 , 80 may be varied accordingly to optimize the fluid flow delivered to the nasal insufflating member 55 depicted in fig1 . both embodiments of the invention depicted in fig2 c and 2 d may be used to retrofit an existing nasal cannula available in the current art or provided as a complete nasal cannula assembly . inclusion of the bellows joints as adjustment members 30 a , 30 b , 30 c , 30 d allows a wearer 5 of the nasal cannula to adjust various portions of the fluid supply tubing to achieve a more comfortable wearing position . wearing adjustment is made simply by repositioning of the applicable section ( s ) of the supply tubing and flexing of the bellows joints ( adjustment members 30 a , 30 b , 30 c , 30 d ) depicted in fig1 . referring to fig3 a , another embodiment of the invention is depicted . in this embodiment of the invention , a flow through adjustable joint 30 a is disposed into the nasal cannula invention at two or more of the adjustment member positions 30 a , 30 b , 30 c , 30 d depicted in fig1 . the flow through adjustment member 30 a is uniform in diameter for direct attachment to the first and second fluid supply tubes 20 , 15 , and / or the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 . the adjustment member 30 a , as is depicted in fig3 b , is constructed of one or more non - ferromagnetic metals that are compatible with the polymeric construction materials of the first and second fluid supply tubes 20 , 15 , and / or the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 . for example , non - ferromagnetic metal tubing constructed from aluminum , copper or austenitic stainless steel may be used for the adjustment members 30 a . non - ferromagnetic metals are important for wearers who may undergo magnetic resonance imaging ( mri ) procedures . if mri procedures are not of concern , iron alloys may be employed as well . to achieve the necessary flexibility , positioning memory and structural integrity , the wall thicknesses of the metal tubing comprising the adjustment member 30 a is optimized to allow the tubing to bend without reaching the ductility limit ( s ) of the metal . in one embodiment of the invention , depicted in fig3 c , the adjustment member 30 a is dimensioned to fit into the first and second fluid supply tubes 20 , 15 , and / or the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 . in this embodiment of the invention , the outer diameter of the metal adjustment member 30 a is dimensioned slightly larger than the inner diameters of the fluid supply tubing 35 , 20 . the resilient properties of the dimensionally expanded fluid supply tubing 35 , 20 forms sealed joints over the adjustment member 30 a . alternately , the adjustment member 30 a may be attached to the various fluid supply tubing using an adhesive . the various inner and outer diameters of the first and second fluid supply tubes 20 , 15 , the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 and / or the inlet and outlet nozzles 75 , 80 may be varied accordingly to optimize the fluid flow delivered to the nasal insufflating member 55 depicted in fig1 . in another related embodiment of the invention , depicted in fig3 d , the adjustment member 30 a is dimensioned to fit over the first and second fluid supply tubes 20 , 15 , and / or the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 . in this embodiment of the invention , the inner diameter of the adjustment member 30 a is slightly smaller in diameter than the fluid supply tubing 35 , 20 . the resilient properties of the dimensionally compressed fluid supply tubing 35 , 20 forms sealed joints within the adjustment member 30 a . alternately , the adjustment member 30 a may be attached to the various fluid supply tubing using an adhesive . as previously described , the various diameters of the first and second fluid supply tubes 20 , 15 , the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 and / or the inlet and outlet nozzles 75 , 80 may be varied accordingly to optimize the fluid flow delivered to the nasal insufflating member 55 depicted in fig1 . both embodiments of the invention depicted in fig3 c and 3 d may be used to retrofit an existing nasal cannula available in the current art or provided as a complete nasal cannula assembly . inclusion of the metal adjustment members 30 a , 30 b , 30 c , 30 d allows a wearer 5 of the nasal cannula to adjust various portions of the fluid supply tubing to achieve a more comfortable wearing position . wearing adjustment is made simply by bending of the applicable section ( s ) of the of the adjustment members 30 a , 30 b , 30 c , 30 d depicted in fig1 . referring to fig4 a , another embodiment of the invention is depicted . in this embodiment of the invention a flow through flexible polymeric joint ( adjustment member ) 30 a is disposed into the nasal cannula invention at two or more of the adjustment member positions 30 a , 30 b , 30 c , 30 d depicted in fig1 . the polymeric joint 30 a as depicted in fig4 b , is constructed primarily of polymeric materials which is compatible with the polymeric construction materials of the first and second fluid supply tubes 20 , 15 , and / or the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 . in addition , a thin non - ferromagnetic metal ribbon or wire 65 , 65 ′ is incorporated along a long axis of the polymeric joint ( adjustment member ) 30 a . the addition of the thin non - ferromagnetic metal ribbon or wire 65 , 65 ′ provides the necessary positioning memory not generally available in the inexpensive thermoplastic polymers normally found in nasal cannula constructions . the metal ribbon or wire 65 , 65 ′ may extruded with the thermoplastic tubing at the time of tubing manufacture or added thereafter by heating the ribbon or wire 65 , 65 ′ beyond the melting point of the thermoplastic and embedding the metal into polymeric tubing . in both of the aforementioned manufacturing methods , the metal ribbon or wire 65 , 65 ′ should be embedded entirely in the polymeric construction of the tubing rather than extending into the fluid flow channel . this reduces the chances of oxidation and possible reaction if high concentrations of oxygen are to be used as the fluid provided to the wearer . in one embodiment of the invention , depicted in fig4 c , the adjustment member 30 a is dimensioned to fit into the first and second fluid supply tubes 20 , 15 , and / or the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 . in this embodiment of the invention , the outer diameter of the adjustment member 30 a is dimensioned slightly larger than the inner diameters of the fluid supply tubing 35 , 20 . the resilient properties of the dimensionally expanded fluid supply tubing 35 , 20 forms sealed joints over the adjustment member 30 a . alternately , the adjustment member 30 a may be attached to the various fluid supply tubing using an adhesive . the various inner and outer diameters of the first and second fluid supply tubes 20 , 15 , the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 and / or the inlet and outlet nozzles 75 , 80 may be varied accordingly to optimize the fluid flow delivered to the nasal insufflating member 55 depicted in fig1 . in another related embodiment of the invention , depicted in fig4 d , the adjustment member 30 a is dimensioned to fit over the first and second fluid supply tubes 20 , 15 , and / or the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 . in this embodiment of the invention , the inner diameter of the adjustment member 30 a is slightly smaller in diameter than the fluid supply tubing 35 , 20 . the resilient properties of the dimensionally compressed fluid supply tubing 35 , 20 forms sealed joints within the adjustment member 30 a . alternately , the adjustment member 30 a may be attached to the various fluid supply tubing using an adhesive . as previously described , the various diameters of the first and second fluid supply tubes 20 , 15 , the first , second , third , and fourth supply tube segments 35 , 40 , 45 , 50 and / or the inlet and outlet nozzles 75 , 80 may be varied accordingly to optimize the fluid flow delivered to the nasal insufflating member 55 depicted in fig1 . both embodiments of the invention depicted in fig4 c and 4 d may be used to retrofit an existing nasal cannula available in the current art or provided as a complete nasal cannula assembly . inclusion of the adjustment members 30 a , 30 b , 30 c , 30 d allows a wearer 5 of the nasal cannula to adjust various portions of the fluid supply tubing to achieve a more comfortable wearing position . wearing adjustment is made simply by bending of the applicable section ( s ) of the of the adjustment members 30 a , 30 b , 30 c , 30 d depicted in fig1 . referring to fig4 e , another embodiment of the invention is depicted where the adjustment member 30 a is dimensioned to slidably fit over the first and second fluid supply tubes 20 , 15 , becoming a slidable sleeve which may be repositioned anywhere along the contiguous outer surfaces of the first and second fluid supply tubes 20 , 15 . as such , the adjustment member 30 a in this embodiment of the invention does not become part of the fluid flow channel and is therefore ideal as a simple retrofit of existing nasal cannula apparatus . usage of this embodiment of the invention by the wearer 5 of the nasal cannula apparatus is nearly identical to that described above with the added advantage of the wearer being able to slide one or more of the adjustment members 30 a , 30 b , 30 c , 30 d to the most comfortable positions along the long axis of the first and second fluid supply tubes 20 , 15 . referring to fig5 a , a final embodiment of the invention is shown where a non - ferromagnetic metal ribbon or wire 65 is embedded directly in the first and second fluid supply tubes 20 , 15 . this embodiment of the invention is simply an extension of the embodiments of the invention described above for fig4 a , 4 b , 4 c , 4 d and 4 e where a metal ribbon or wire 65 ′ is incorporated directly into the polymeric construction of the first or second fluid supply tubes 20 , 15 as shown in fig5 b . this embodiment of the invention provides an additional advantage in that there are no rough surfaces or tubing diameter changes involved in the construction of the nasal cannula apparatus . the wearer 5 of the nasal cannula apparatus which incorporates this embodiment of the invention may simply bend the portion or portions of the first and second fluid supply tubes 20 , 15 to the most desirable position without encountering rough edges which could irritate the skin or tubing diameter changes which snag on clothing . all other aspects of this embodiment of the invention are nearly identical to those described above fig4 a , 4 b , 4 c , 4 d and 4 e . the foregoing described embodiments of the invention are provided as illustrations and descriptions . they are not intended to limit the invention to precise form described . in particular , it is contemplated that functional implementation of the invention described herein may be constructed in various shapes and of different materials . no specific limitation is intended to a particular shape or construction material . other variations and embodiments are possible in light of above teachings , and it is not intended that this detailed description limit the scope of invention , but rather by the claims following herein .
a nasal cannula apparatus which includes one or more adjustment members which allow a wearer of the apparatus to retentively reposition the fluid supply tubing to a desired position of comfort . the ability to retentively reposition minimizes the dermal abrasion problems of the ears and other portions of the face experienced by the prolonged wearing of the nasal cannula apparatus encountered in the current art .