as shown in the drawings for purposes of illustration , the present invention for a cannula support is referred to generally by the reference number 10 in fig2 - 7 . in this respect , the support 10 may be used in association with a cannula that consists of a somewhat slender and elongated tube 12 ( fig1 ) that extends from a device such as an oxygen tank , a portable oxygen generator , or a wall connection in a hospital that delivers oxygen via a flow meter ( not shown ) at one end to one or more open ended branches or ports 14 at the other end designed to be inserted into , for example , a nostril 16 to deliver supplemental oxygen to a patient in need of respiratory help . oxygen flows from the source , through the flexible tube 12 and out through one or more of the open - ended branches or ports 14 as a means to supplement breathing . the open - ended branches or ports 14 may vary in size depending on the desired flow rate . as generally shown in fig1 , the branches or ports 14 of the cannula flexible tube 12 are positioned near the nostrils 16 to provide oxygen thereto . from here , the cannula flexible tube 12 wraps around the cheeks of the wearer 22 toward the ears 18 . as such , the flexible plastic tube 12 may extend into a space or channel 24 formed between the head 20 and a portion of the outwardly extending ear 18 . the cannula flexible tube 12 then wraps around the ear 18 , comes back toward the front of the neck by the chin and travels back to the oxygen source . the tube 12 is typically made from a somewhat flexible plastic material that can be manipulated in a manner that allows conformity around the wearer &# 39 ; s facial features , for example the exterior curvature of the face and around the ear 18 , to streamline the fit of the cannula to the wearer 22 as shown in fig1 . the support 10 disclosed herein is a supplemental attachment for the cannula flexible tube 12 as it is designed to reduce or eliminate the aforementioned problems associated with skin - to - plastic contact with the flexible tube 12 . that is , the support 10 helps reduce indentations that may form in and around the skin from constant contact with the flexible tube 12 , reduce redness , sores or other skin irritations , and reduce or eliminate tearing of the skin resultant from the flexible tube 12 sticking to the skin . fig2 illustrates one embodiment of the support 10 in the form of a curled or coiled cord that may be formed by winding strips of material around a cylinder to create the shown helical shape . preferably , the support 10 comprises a form of elastic material ( e . g ., polyester ) that permits stretching or uncoiling when loaded ( fig3 ), while also returning to its natural length ( fig2 ) when unloaded . the helical shape of the support 10 shown in fig2 - 7 produces a smooth three - dimensional curve with each coil initially aligned along a common central axis 30 ( fig3 ). while the support 10 in fig2 - 7 is substantially cylindrical in shape , it could be made into a conical shape by winding it around a cone , for example . in this respect , the ends 26 , 28 of the support 10 may taper inwardly toward the exterior circumference of the flexible tube 12 to provide a tighter fit thereto at each of the ends 26 , 28 . this embodiment may prevent the support 10 from sliding along the length of the flexible tube 12 , as is problematic with the e - z wraps . the shape , structure and materials of the support 10 are , in one embodiment , comparable to or the same as the outer polyester material of curly or spiral shoelaces . in this respect , the support 10 may similarly include a tight inner core that helps maintain or form the outer polyester material into the spiral or helical shape of the support 10 . the outer layer preferably includes the aforementioned polyester material , but a person of ordinary skill in the art will readily recognize that the outer layer of the support 10 may be made from various types of materials , such as cotton , nylon , polyester , spandex , etc . of course , the support 10 may include only the outer polyester material or both the outer polyester material with the harder inner core . in this respect , the outer polyester material may be configured to naturally coil itself , as disclosed herein . the elasticity of the support 10 allows it to be bent , curved , extended , retracted , etc . as generally shown in fig3 - 7 . in this respect , material selection is important so that the support 10 can adequately conform to the outer curved surface of the ear ( fig6 and 7 ) to bias the plastic tube 12 away from contacting the skin . the support 10 may also enhance the positional stability of the cannula in and around the ear 18 by increasing the traction therewith while comfortably contacting the skin without causing irritation thereto . the substantially spiral or helical shape of the support 10 made from polyester ( or a comparable material ) accomplishes these objectives . for instance , fig4 illustrates the support 10 being bent and turned around the exterior of the flexible tube 12 . in this embodiment , the inner diameter formed by the helical structure of the support 10 is approximately the same size as the outer diameter of the flexible tube 12 . this allows the wearer 22 to comfortably slide or spiral bind the support 10 along the length of the flexible tube 12 to properly locate and place the support 10 to attain a comfortable fit behind the ear 18 , as shown in fig7 . the inner diameter of the support 10 may , alternatively , be somewhat smaller than the outer diameter of the flexible tube 12 to enhance frictional contact therebetween during use . this , of course , will tend to inhibit movement of the support 10 along the length of the flexible tube 12 relative to a support 10 with a larger diameter . in another alternative embodiment , the support 10 may have a somewhat larger inner diameter at or near its mid - section 32 ( generally shown in fig2 ) that terminates at respective conically shaped ends 26 , 28 . this embodiment may provide enhanced contact at each end 26 , 28 , while allowing greater adjustability in the larger diameter mid - section 32 . as shown in fig5 relative to fig4 , the support 10 is flexible enough to be wound around the exterior of the flexible tube 12 . in one embodiment , the support 10 attached to the flexible tube 12 , as shown in fig5 , may be a two inch piece of curled shoelace with the harder interior cord removed . once attached , the wearer may manipulate the shape and placement of the flexible tube 12 with the support 10 mounted thereto . in this regard , fig5 illustrates the support 10 partially curved and shaped to conform to the curved exterior surface of the ear 18 . placement behind the ear 18 in this manner , and as shown in fig7 , permits the support 10 to bias the inner plastic flexible tube 12 away from contacting the skin in and around the ear 18 to prevent or stop the aforementioned skin irritations . since the support 10 is curled around the exterior of the flexible tube 12 , it does not fall off when bent around the ear 18 . in this respect , the curled helical shape not only grips to portions of the flexible tube 12 to prevent slippage , as described above , but it also provides enhanced traction against the skin in the area in and around the ear 18 . additionally , the polyester clothing - type material made from a series of interwoven spiral - bound fibers allows the skin to breath underneath ( similar to clothing ) and does not have the same abrasive surface interaction with the skin as does the plastic material of the flexible tube 12 . accordingly , the support 10 stays on the flexible tube 12 until purposefully unwrapped , provides adequate stability , and causes virtually no skin irritation . moreover , the spiral or helical shape of the interwoven fibers of the support 10 provides the flexibility necessary to conform to the outer curvature in and around the ear 18 while providing sufficient traction against the skin without irritation . in this respect , each of the coils of the support 10 may expand ( fig2 ) or contract ( fig3 ) and bend along the central axis 30 thereof ( fig3 relative to fig6 - 7 ). a solid foam material , such as the e - z wrap design , is unable to flex in this manner because the solid material bunches and prevents interior curving , and otherwise does not permit exterior stretching in the same manner that a series of spaced apart and flexible / bendable helical coils provide . this shape and structure of the support 10 further enhances gripping action in and around the ear 18 so that the support 10 and the flexible tube 12 do not slip or slide out from this space or channel 24 when worn by the wearer 22 . that is , the coils are able to bend with the flexible tube 12 so as to remain in some constant frictional contact therewith such that each of the individual coils are no longer necessarily aligned with the central axis 30 . several individuals using a nasal - cannula have used the support 10 disclosed herein as an alternative to using bandages to cover areas around the ears that were torn and bleeding from the irritation of the cannula flexible tube 12 . in each case , the individual was able to use the support 10 for at least six months without having any of the aforementioned problems associated with skin irritation in and around the ears . of course , the support 10 would be beneficial to those who use oxygen , and especially those who must be on oxygen all day and all night . although several embodiments have been described in detail for purposes of illustration , various modifications may be made without departing from the scope and spirit of the invention . accordingly , the invention is not to be limited , except as by the appended claims .
the cannula support includes a helical cord flexible along its length to permit selective axial displacement of adjacent coils for insertion of a cannula tube therein and a breathable material that permits prolonged skin contact substantially without irritation . furthermore , the cannula support includes an exterior surface having a coefficient of friction substantially preventing sliding movement along the length of the cannula tube when mounted thereon .