SUPPORT FOR FORMING A RIGID SUPPORT

Abstract

The system invention describes an support and improved method of application and removal. The support, comprised of a network of flexible, non-porous, multi-lumen tubing interlaces at a plurality of junctions to form a lattice structure. Apertures designed to accommodate boney prominences also permit air or water to reach the skin underneath and encourage rapid fluid flow internally through the lattice. A hydrophobic, thermal-resistant, flowable padding layer is injected within a secondary lumen to the lattice structure, spanning its complete surface area. As a result, the breathability of the support is not affected by this padding layer because it mirrors the apertures of the lattice. At least one liquid is injected into the structure and configured to transform into a solid when acted on by an external mechanical stimulus.

Claims

1. A system to provide a support to a body area, the system comprising: a flexible sleeve defined to include: a network of flexible non-porous tubing interlaced at a plurality of junctions to form a lattice structure, and wherein the lattice structure includes apertures configured to allow for a flow of air and water to the body area and to accommodate for unique contours of the body area, a padding layer positioned to an internal surface defined within the lattice structure, and wherein the padding layer further includes apertures corresponding to the lattice structure apertures such that the flow of air and water to the body area is not impeded by the padding layer, and an inlet attached to the lattice structure to permit the flow of liquids into and out of the network of flexible non-porous tubing; and an external liquid pack configured to hold liquids and further defined to include: first and second chambers separable from each other by a first frangible seal, the first and second chambers separable holding a liquid resin and a catalyst which when the first frangible seal is broken, the liquid resin and catalyst being configured to mix and transform into a solid, a third chamber separable from the first and second chambers by a second frangible seal, an outlet attached to the third chamber, the outlet configured to mate with the inlet on the lattice structure, and wherein when the outlet and secured to the inlet and the first and second frangible seals are broken the liquid resin and a catalyst flow and mix within the lattice structure to transform into a solid such that the flexible sleeve hardens into the support for application to a body area.

2. The system of claim 1, wherein the padding layer is made of a thermo-resistant material configured to dissipate heat caused during the transformation and when the liquid resin and catalyst mix, the transformation into a solid releases heat dissipated by the padding layer.

3. The system of claim 1, wherein the third chamber is empty to buffer the liquid resin and catalyst from the outlet to protect against degradation of the outlet or oxidation of the liquid resin and/or catalyst.

4. The system of claim 1 further comprising a color additive contained in the third chamber, wherein the color additive is a non-white color, and wherein the lattice structure is substantially transparent, the color additive when mixed with the liquid resin and catalyst in the lattice structure is configured to provide a predetermined non-white color to the support.

5. The system of claim 1 further comprising a retardant or an accelerant contained in the third chamber to adjust a curing time of the transformation of the liquid resin and catalyst into the solid.

6. The system of claim 1, wherein the inlet is configured to be removable from the support after the liquids from the external pack transform into the solid.

7. The system of claim 1, wherein the flexible sleeve further includes a series of tabs defined to create a longitudinal seam from one end of the flexible sleeve to a distal end of the flexible sleeve, such that the series of tabs are configured to be cut after the lattice structure forms a support for removal of the support from the body area.

8. The system of claim 1 further comprising a cartridge holding a predetermined color additive defined as being a non-white color additive, the cartridge includes an inlet and outlet to mate with the corresponding outlet on the external liquid pack and the inlet on the lattice structure, and wherein the lattice structure is substantially transparent, such that during mixing and transformation, liquid resin and catalyst flow through the cartridge and mix with the color additive to create a non-white colored support.

9. A method of forming a support for application to a body area, the method comprising: providing a flexible sleeve, wherein the flexible sleeve includes: a network of flexible non-porous tubing interlaced at a plurality of junctions to form a lattice structure, and wherein the lattice structure includes apertures to allow for the flow of air and water to the body area, a padding layer secured to an internal surface defined in the lattice structure, and wherein the padding layer further includes apertures corresponding to the lattice structure apertures such that the flow of air and water to the body area is not impeded by the padding layer, and an inlet attached to the lattice structure to permit the flow of liquids into the network of flexible non-porous tubing; placing the flexible sleeve around the body area for application of a solid support; providing an external liquid pack configured to hold liquids and further defined to include: first and second chambers separable from each other by a first frangible seal, the first and second chambers separable holding a liquid resin and a catalyst which when the first frangible seal is broken, the liquid resin and catalyst being configured to mix and transform into a solid, a third chamber separable from the first and second chambers by a second frangible seal, an outlet attached to the third chamber, the outlet configured to mate with the inlet on the lattice structure; attaching the inlet to the outlet; breaking the first and second frangible seals to begin flowing the liquid resin and catalyst together into the lattice structure, and mixing of the liquid resin and catalyst into the lattice structure to begin transforming the liquid resin and catalyst into a solid; and removing the inlet from the lattice structure after the lattice structure forms the solid support.

10. The method of claim 9 further including the step of: providing a predetermined color additive in the third chamber, wherein the color additive is a non-white color, and wherein the lattice structure is substantially transparent, such that during mixing and transformation, the lattice structure turns into a predetermined non-white color support.

11. The method of claim 9 further including the step of: providing a series of tabs on flexible sleeve to create a longitudinal seam from one end of the flexible sleeve to a distal end of the flexible sleeve; and breaking the series of tabs after the lattice structure forms a support to remove the support from the body area.

12. The method of claim 9 further including the step of: providing a removable plastic insert placed within the flexible sleeve to assist with the placement of the flexible sleeve over the body area and removing the removable plastic insert prior to connecting the inlet and the outlet together.

13. The method of claim 9 further including the step of: providing a retardant or an accelerant contained in the third chamber to adjust a curing time of the transformation of the liquid resin and catalyst into the solid.

14. The method of claim 9 further including the step of: providing a cartridge holding a predetermined color additive defined as being a non-white color additive, the cartridge includes an inlet and outlet to mate with the corresponding outlet on the external liquid pack and the inlet on the lattice structure, such that during mixing and transformation, liquid resin and catalyst flow through the cartridge and mix with the color additive to create a non-white colored support.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] A fuller understanding of the foregoing system invention and method of application may be had by reference to the accompanying drawings, wherein:

[0022] FIG. 1a shows a perspective view of system embodiment comprising an external pack to be connected to a flexible sleeve over an affected body area to construct an support;

[0023] FIG. 1b is a perspective view of an embodiment of the final rigid support constructed from the system invention in FIG. 1a;

[0024] FIG. 2a is a side view an embodiment of the flexible sleeve referenced in FIG. 1a including temporary and optional components to the system invention;

[0025] FIG. 2b is a cut-away view of the completed embodiment in FIG. 2a, sectioned along the plane showing the layers of the of the support;

[0026] FIG. 3a is an illustration of the preferred embodiment for the external pack;

[0027] FIG. 3b is a top view of the external pack from FIG. 3a further illustrating an internal layer and division of sections thereof;

[0028] FIG. 4 is an enlarged view of an optional component used in one or more of the system embodiments;

[0029] FIG. 5a is an illustration of one aspect of the system application over the affected body area. In the preferred embodiment, an optional component is used to assist with the application;

[0030] FIG. 5b is a perspective view of the removal of the optional component in FIG. 5a after it has been used;

[0031] FIG. 6 is an illustration of a method of use of one embodiment for the external pack;

[0032] FIG. 7a is an enlarged view of the connecting components used to engage embodiments shown in FIG. 1a of the system invention;

[0033] FIG. 7b shows an optional component to be used with the valves illustrated in FIG. 7a;

[0034] FIG. 8 is a perspective view of one aspect of the system in which the valve component is being removed after use;

[0035] FIG. 9 is a perspective view of an optional component used in one or more of the system embodiments to wrap around the affected body area and support;

[0036] FIG. 10 is a perspective view of the preferred method of removal used in one or more embodiments of the system;

[0037] FIG. 11a is a top view of the preferred method of removal of the embodiment;

[0038] FIG. 11b is a perspective view of one aspect of removal of the embodiment;

[0039] FIG. 12 is a diagram illustrating the thermal resistance of one embodiment of the padding layer; and

[0040] FIGS. 13a & 13b illustrate a flow diagram of one embodiment of the system invention illustrating the preferred method of application, creation, and removal.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] While the system invention is susceptible to embodiments of varying forms, shown are drawings of the preferred embodiments of the present system invention and method for using the same will be detailed herein. However, it should be understood the present disclosure is an exemplification of the principles of the invention and not intended to limit the spirit or scope of the system and/or the claims of the embodiments illustrated. As referred to herein the term support generally refers to orthotics and orthopedic casts, braces, and splints, specifically, for the support and immobilization of a joint and limb.

[0042] Referring now to FIG. 1a, illustrated is a preferred embodiment of the overall system 100 invention comprising of an external pack 110 with frangible seals 115/120 and filled with at least one liquid. The external pack 110 is connected to the flexible sleeve 130 via a series of valves 135/140 and is used to inject the liquid(s) into the flexible sleeve 130. The filled sleeve can then be molded and allowed to solidify over an affected body area 145. When constructed in accordance with one or more embodiments of the system 100 invention, an support 200 is formed (FIG. 1b). FIGS. 1a and 1b show the preferred embodiments of system invention in the form of a short arm support 200 that is applied to the distal forearm and wrist 145.

[0043] FIG. 2a shows the initially flexible sleeve 130 of the system consisting of a network of elastic tubing that is interlaced at a plurality of junctions 210 to form a unique lattice 205 structure. The lattice 205 is configured to have multiple lumen 250, shown in FIG. 2b, in which varying thicknesses of the elastic tubing layers 300/310/320 are stacked. This arrangement of material better accommodates internal pressures from filling, reduces kinking in the material, and maintains elasticity in the sleeve 130. The sleeve 130 is preferably made from a medical grade polyurethane blend that is nonporous and biocompatible, that can make the flexible sleeve 130 waterproof and resistant to bacterial accumulation or tissue ingrowth of the skin underneath. The material itself is also resistant to UV degradation with a relatively high tear resistance to make it suitable for outdoor use. In an ideal variation, the sleeve 130 is created by extruding the polyurethane blend into thin sheets of film that are then cut and sealed using various techniques not limited to welding, heat, or adhesives.

[0044] Apertures 220 are included in the lattice 205 structure to allow for expansion of the tubing while it is being applied to a subject, and also allow for the flow of air and water to the subject's skin. Various sized apertures 220 may be included to accommodate body features such as a thumb, fingers, or wrist. The lattices 205 of the sleeve 130 are shaped and patterned such that the structure mimics the appearance and functionality of naturally occurring formations known to promote shape adaptability and load bearing in both transverse directions. The windowed design also permits air or water to reach the skin underneath the support and encourage rapid filling of the liquid(s) throughout the internal sleeve 130 structure. The overall profile of the sleeve 130 was constructed following recommendations of ergonomic clothing design, which in the instance of the short arm support 200 shown in FIG. 1a, is a custom glove profile. Dimensioning the design accurately to specific body areas is driven by NASA listed anthropometric data. Also, the final configuration for the network of tubing varies according to the specific body area 145 affected, as well as the differing support requirements for treatment across injuries. Lastly, the breathability of the latticed 205 sleeve design allows the underlying skin to be routinely washed, dried, and easily checked by physicians; options that are otherwise unavailable with standard casting methods.

[0045] A flowable gel-like material that can be injected into the lumen of the lattice structure that directly abuts the skin offers cushioning 255 to the invention. This padding 255, shown in FIG. 2b, must span the entire surface area of the flexible sleeve 130 to not only provide a soft material between the body and rigid structure of the support 200, but also act as a protective thermal-resistant layer against the heat generated during the hardening of resinous liquid(s). Many resinous liquid mixtures can reach temperatures over 150? F. when hardening to their solid form, which when exposed to unprotected skin, can cause severe burns and pain. The thermal-resistance of the padding was selected specifically to prevent transfer of the exotherm to the skin and maintain exposure to less than 113? F., as defined by NASA safety standards. FIG. 12 illustrates the thermal resistance of this preferred embodiment using the flowable padding layer 255 compared against skin surface temperatures recorded without use of a padding layer. FIG. 2b shows a cutaway view of the embodiment from FIG. 2a, sectioned to expose the layers of the of the support 200. An enlarged cross-sectional view of the lattice structure includes a thick flexible sleeve layer 300, resin 305, thin flexible sleeve layer 310, internally encased flowable thermo-resistant padding 255, and a final thin flexible sleeve layer 320. It should be noted, the breathability of the latticed sleeve 130 is not impeded by the padding 255 layer since it is internally encased within the multi-lumen structure. Additionally, the minimal thickness of the padding reduces the bulkiness and weight of the support 200, while still promoting anatomical conformity of the support and overall patient comfort. A valve 140 is secured to at least one inlet of the flexible sleeve 130 that is used to connect to the valve 135 component of the external pack 110 and allow the transfer of liquid(s).

[0046] FIG. 3a is an illustration of the preferred embodiment for the external pack 110, comprising of a handle 315 that is secured internally, a valve component 135, and at least two frangible seals 115 and 120 to create at least three chambers 410, 415, 420 used to contain liquids including a resin, a catalyst, or other additives separately. All chambers 410, 415, 420 may be filled with liquids, whereas the smaller additive chamber 420 may alternatively remain void of liquid to act as an antechamber and protect against degradation of the valve component 135 or oxidation of the other contained liquids.

[0047] In the preferred embodiment, the chambers 410, 415, 420 are defined to hold a polyurethane resin, a catalyst, and a coloring agent, that when mixed together and injected into the flexible sleeve 130, transform into a rigid structure of a particular color in the form of the sleeve 130 lattice. As such, it is preferred that the flexible sleeve 130 is transparent or translucent to allow viewing of the colored resinous liquid flowing throughout and showing any air bubbles that need to be guided manually out through the valves 135/140. The transparency of the flexible sleeve 130 material also gives the user the opportunity to view the curing process of the resin 425/305 and determine when gelling has occurred. At which point, the product may be manually molded to better conform about the limb until it transforms into a completely hardened support 200. The final hardened resin 305 is of a single homogenous color with a minimum Shore Hardness of at least 70 D. Alternative embodiments include chemical additives such as retardants or accelerants contained in the small additive chamber 420 of the external pack 110 that alter the curing time of the hardenable liquid in order to vary the use of the system making it suitable for many applications.

[0048] In an alternative application, the hardenable liquids, defined to include a polyurethane resin and catalyst, are mixed thoroughly prior to the bursting of the final frangible seal 115/120 separating the colorant. The resinous contents are not mixed further after the coloring agent has been introduced, but rather immediately injected into the network of tubing. This alternative application method creates a different coloring scheme in which a tie-dye effect is seen throughout entire lattice structure, rather than a single homogenous color.

[0049] FIG. 3b is a top view of the embodiment from FIG. 3a with the topmost layer of material removed to expose the internal structure of the external pack 110. The perimeter seams 455 of the external pack 110 are permanent, non-frangible seals created by stacking two materials atop of one another and bonding them together. Two openings 460/465 in the perimeter seam 455 are used for meter-filling of the liquid contents into the chambers 410/415 of the external pack 110 prior to sealing the external pack layers. These fill openings 460/465 are then closed permanently post-filling using methods such as impulse sealing. For the portion of the pack that is a temporary frangible seal 115/120, a third material is introduced between the existing two external pack layers then lightly bonded together (FIG. 3b). The seal of all three materials is weaker than the perimeter seam 455, such that when external pressure is applied to the frangible seal 115/120, only the frangible seal 115/120 will burst and allow the separated liquids to mix. This portion of the external pack is known as the burst zone 470/475. A valve 135 secured to an opposing end of the external pack 110 is used to connect this component to the valve 140 on the flexible sleeve 130 and allow the transfer of liquid(s) between the two.

[0050] Referring to FIG. 6, a perspective view of one embodiment of the external pack 110 illustrates the use of the internal handle 315 to roll and apply the pressure needed to burst the frangible seals 115 and 120, and thus initiating the mixing of liquids in adjacent chambers 410, 415, 420 initially separated.

[0051] FIG. 7a is an enlarged view of the valve system 135/140 used to connect and secure the external pack 110 to the flexible sleeve 130. The quick coupling valves 135/140 engage and lock the system components easily to begin the transfer of the liquid(s) into the flexible sleeve 130. The diameter of the valve spout was selected to encourage rapid dispensing of the resinous material without straining the user to apply enough pressure. In the preferred application, virtually all liquid contents in the external pack 110 are transferred to the flexible lattice structure. The two-way flow of the valves 135/140 also permits removal of excess air within the network of tubing that could potentially compromise the structural integrity of the final rigid support 200. After liquid transfer has been completed, a built-in shut-off feature of the valves 135/140 prevents any spilling of liquids during disconnection and the external pack 110 can then be disposed. FIG. 7b illustrates an optional component of the system to introduce coloring agents in the liquid mixture. A cartridge 500 contains any dye or additives such as glitter to enhance to appearance of the support 200 and provide an alternative means of introducing dye 440 to the system.

[0052] Prior to bursting the frangible seal 115 of the external pack 110 and initiate curing of the resinous liquid mixture, the flexible sleeve 130 must first be fitted and placed over the affected area. To properly fit the sleeve 130, a measuring tool 600 is used in one or more of the system embodiments. FIG. 4 demonstrates the method of use for a short arm support to check palm circumference of the hand 145 and determine a correct size of support 200 for application. FIG. 5a is a perspective view of one aspect of the system application in which the flexible sleeve 130 is slid over the affected limb. In one embodiment, a removable plastic insert 700 within the flexible sleeve 130 is used to assist with sliding. The optional plastic insert 700 is then removed, and the sequence of bursting frangible seals 115 and 120 of the external pack 119 can begin (FIG. 5b and FIG. 6).

[0053] After all frangible seals 115/120 of the external pack 110 have been burst and contents mixed sufficiently, the valve components 135/140 of the external pack 110 and flexible sleeve 130 can then be connected to fully transfer liquid into the sleeve 130 (FIG. 1a and FIG. 7a). Any air bubbles present in the sleeve 130 may be manually guided out through the two-way valve 135/140. The valves are then disconnected, and the now empty external pack 110 is discarded. This complete process takes ideally no more than 3 minutes, at which point the resinous liquid has begun to gel and is no longer flowable but still very malleable.

[0054] There is period in which the filled sleeve 130 can be manually molded about the limb prior to the resin 425 fully curing into its rigid structure. An optional elastic wrap 800, shown in FIG. 9, made of a thin and breathable material can be used to wrap around the limb under the flexible sleeve 130 to better conform the support 200. The elastic wrap 800 allows for heat created from the curing of resin to dissipate. Sufficient curing of the support 200 can occur within 10-15 minutes of initiating the application process, at which point the elastic wrap 800 is removed and valve component 140 of the support is cut off with shears 805 (FIG. 8). Both elastic wrap 800 and valve 140 can be disposed. The final rigid support 200 is shown in FIG. 1b.

[0055] In a preferred method of removing the support, clinical shears 805 are used to cut through the tabs 810 along the cutting seam avoiding all resinous material (FIG. 10). The tabs 810 are extensions of the flexible sleeve 130 material, that are the result of sealing the flexible sleeve 130 structure closed during its fabrication and creating a seam for cutting. No resinous or padding material is found in the tabs 810 of the support 200. The support 200 can then be manually spread open and removed from the affected body area 145, as demonstrated in FIGS. 11a and 11b. The support 200 can then be disposed of normally. This preferred process of removal eliminates the messy and bothersome production of dust particles caused by using cast saws. The method also reduces the trauma of noisy and potentially harmful sawing can have on young patients. This improved process of removing the support 200 also reduces cost of supplies and reduces the time required from physicians to spend with each individual patient.

[0056] A flow diagram, FIGS. 13a and 13b, of the preferred embodiment of the system invention 100, illustrates this method of application and removal of the support 200 detailed above. As outlined, BOX 902, a patient is confirmed suitable for treatment using the support embodied herein. A measuring tool around the patient's palm is used to determine the proper size of the support, BOX 904. The measuring tool may be further used around the forearm to confirm the size, BOX 906. Based on the measurements, the proper sized support for the patient is selected, BOX 908. The patient then slides the limb into the support, BOX 910. If a plastic insert is used, it can be removed from the support, BOX 912, and then discarded, BOX 914. A proper fit and alignment should be considered at this particular time, BOX 916. The external pack should be inverted, BOX 918 and the first frangible seam can be burst allowing the catalyst and the resin to mix, BOX 920. The external pack should again be inverted, BOX 922. The second frangible seam can be burst to mix in the colorant or additive, BOX 924. The external pack should again be inverted if a uniform color is desired, BOX 926. The external pack should be connected to the sleeve, BOX 928, and the external pack rolled while holding the external pack handle to inject mixture into the sleeve, BOX 930. If necessary, excess air from the sleeve can be manually guided out of the sleeve to the external pack via the valves, BOX 932. The valves can be disconnected, BOX 934 and the external pack discarded, BOX 936. If necessary, the placement of the support can be adjusted, BOX 938. A wrap or elastic bandage may be placed around the support for a tighter fit, BOX 940. The valve from the sleeve can be cut once the filled sleeve hardens, BOX 942 and then discarded, BOX 944. The elastic bandage can also be removed, BOX 946, and discarded, BOX 948. Once the injured area has been addressed and the support is ready to be removed, the support can be cut along the seam (or tabs) to remove it from the patient, BOX 950 and then discarded, BOX 952.

[0057] From the foregoing and as mentioned above, it will be observed that numerous variations and modifications may be effected without departing from the spirit and scope of the novel concept of the invention. It is to be understood that no limitation with respect to the specific methods and apparatus illustrated herein is intended or should be inferred. It is, of course, intended to cover by the appended claims all such modifications as fall within the scope of the claims.