Spinal brace having laminate shells

Abstract

A spinal orthosis for treating a spine, including an anterior support and a posterior support, each support made of a laminate having a flexible foam material and a substantially rigid plastic sheet material sandwiched between a pair of soft flexible sheet materials and bonded together to yield a unitary and substantially rigid laminate material.

Description

FIELD OF THE INVENTION

This invention relates generally to medical orthoses. More particularly, this invention relates to spinal braces which have sufficient rigidity to serve a support function, yet which do not unduly constrict breathing of the patient wearing the brace and offer improved comfort.

BACKGROUND AND SUMMARY OF THE INVENTION

Improvement is desired in the field of spinal braces. Braces are typically constructed using rigid materials, such as being formed by vacuum molding plastic. Such braces have good support characteristics, but, are disadvantageous in that they are relatively heavy and may constrict respiration of the patient and be uncomfortable to wear.

The disclosure relates to an improved spinal orthosis that is relatively lightweight and supportive, and which is believed to offer improved comfort and reduced constriction of respiration as compared to conventional spinal braces.

In a preferred embodiment, the orthosis includes an anterior support and a posterior support, each support made of a laminate having a flexible foam material and a substantially rigid plastic sheet material sandwiched between a pair of soft flexible sheet materials and bonded together to yield a unitary and substantially rigid laminate material.

BRIEF DESCRIPTION OF THE DRAWINGS

Further features of preferred embodiments of the invention will become apparent by reference to the detailed description of preferred embodiments when considered in conjunction with the figures, which are not to scale, wherein like reference numbers, indicate like elements through the several views, and wherein,

FIG. 1 is a perspective side view of a spinal brace in accordance with a preferred embodiment of the invention.

FIG. 2 is an exploded view of a laminate material used in the brace of FIG. 1

FIG. 3 is an exterior plan view of a posterior support of the brace of FIG. 1.

FIG. 4 is an interior plan view of the posterior support of FIG. 3.

FIG. 5 is an exterior plan view of an anterior support of the brace of FIG. 1.

FIG. 6 is an interior plan view of the anterior support of FIG. 5.

DETAILED DESCRIPTION

With reference to the drawings, the invention relates to a spinal brace 10 particularly configured to serve as a thoracic-lumbar-sacral orthosis (TLSO). The brace 10 includes a posterior support 12 and an anterior support 14. The supports 12 and 14 are each made of a laminate material 16 (FIG. 2) that enables the supports 12 and 14 to have sufficient rigidity to serve a support function, yet to be relatively lightweight and to avoid undue constriction of breathing of the patient wearing the brace. The brace 10 also preferably includes a pair of strap assemblies 18. The brace 10 is preferably positioned on a patient while supine.

It will be understood that the brace 10 may be otherwise configured for providing an orthosis suitable for treating other portions of the spine, such as the cervical portions, as well as fewer portions, such as a configuration as a lumbar-sacral orthosis (LSO). The brace 10 may also be configured to impart a particular orientation, such as a flexion, extension, or a neutral orientation to the spine.

The supports 12 and 14 are each preferably of lightweight laminate construction and have sufficient rigidity to serve a support function, while also having a degree of flexibility sufficient to permit substantially unrestricted contractions and expansions of the torso of the user associated with breathing.

With reference to FIG. 2, the supports 12 and 14 each include an interior or patient engaging surface 20 and an exterior surface 22. The surfaces 20 and 22 are preferably each made of a soft material that is capable of engaging hook material in the context of mating hook and loop materials, such as VELCRO. However, other soft, preferably fabric materials may be used. Sandwiched between the surfaces 20 and 22 is a foam material 24 and a plastic sheet 26, with such components being bonded to one another to form a unitary laminate material.

The foam material 24 is preferably a sheet of about ⅛ inch thick closed cell foam material. The sheet 26 is preferably a sheet of about 1/16 inch thick low density polyethylene. The components of the supports 12 and 14 are preferably bonded to form the laminate material as by vacuum molding with adhesive placed between each layer. Alternatively, the supports are made by flame lamination without the use of adhesive. In flame lamination, the layers are passed over an open flame to partially melt the foam to create a thin layer of molten polymer. The molten polymer serves to adhere the materials together on both sides of the foam. The supports may be heated if desired, as by a heat gun or oven, to soften them so that they may be custom fit to the patient.

With additional reference to FIGS. 3 and 4, the posterior support 12 is made of the laminate 16 and generally shaped to conform to and wrap around a posterior portion of a patient. An elongate aperture 30 is provided on the support at a central location corresponding to the location of the spinal column of a patient. The support 12 may include additional rigidifying structure adjacent the aperture 30 to rigidify the support at locations immediately lateral the spinal column of the user. This may be accomplished as by incorporating additional rigidifying materials within the laminate, such as rigid strips of ABS plastic, along both sides of the aperture 30. Alternatively, as seen in FIG. 3, this may be accomplished by including an external rigidifying member 32.

The rigidifying member 32 preferably provides additional rigidity along the sides of the aperture 30 and may be provided as rigid members such as aluminum or composite rods or the like. In FIG. 3 the rigidifying member 32 is provided by an aluminum rod configured to be substantially U-shaped and secured to the support as by clamps 34 affixed to the support 12 using fasteners 36, such as plastic screws or rivets. The use of aluminum rods, or other rigid yet malleable material, is desirable in that it may be adjusted to correspond to desired kordotic or lordotic curves. For example, it may be desirable to shape the rigidifying member 32 to impart desired curves to regions of the spinal column and to periodically change these curves.

The support 12 may also include a thoracic support 38 extending above and adjustably positionable relative to the support 12 for supporting the kyphotic curve imparted to the thoracic region of the spinal column. The support 38 may be made of the laminate 16 and may be mounted relative to the support 12 as by use of a U-shaped portion of an aluminum rod 40 adjustably securable to mounting blocks 42 located on the upright ends of the rigidifying member 32. Alternatively, individual or separate sections of aluminum rods may be used to provide the support 38.

With additional reference to FIGS. 5 and 6, the anterior support 14 is made of the laminate 16 and is generally shaped to conform to and wrap around a anterior portion of a patient, and to slightly overwrap the edges of the anterior support 12. If desired, a sternal pad system 50 may be attached to the anterior support 14 for limiting flexion or for hyperextending the upper thoracic region of a patient. The sternal pad system 50 includes a pad member 52, a pair of side mounting members 54, and a central adjustable mounting system 56.

The pad member 52 is preferably made of the laminate 16. The pad member 52 is substantially U-shaped and configured for cradling the sternum of a user. The side mounting members 54 are preferably provided by elongate strips of a rigid plastic material, such as ABS plastic, and configured to be statically or adjustably positioned. For example, an upper end of the mounting members 54 is preferably angled so that they can be reversed to change the mounted position or angle of the pad member 52 relative to the support 14. The mounting members 54 are preferably secured to the support 14 and the pad member 52 as by fasteners 58, most preferably adjacent the exposed edges of the support 14 and the pad member 52.

The central adjustable mounting system 56 (FIG. 5) preferably includes a support mounting plate 60, a pad member mounting plate 62, and a rigid extension 64 that spans between the plate 60 and the plate 62. Fasteners 66 may be used to mount the plates 60 and 62, the plates 60 and 62 preferably being made of a lightweight plastic material, such as ABS plastic. The plate 60 preferably mounts to a central portion of the support 14 and includes a mounting block 68 for adjustably receiving the extension 64. In this regard, the extension 64 may be provided as by a U-shaped portion of an aluminum rod 70 adjustably securable to the mounting block 68 so as to permit adjustment of the height of the pad member 52 relative to the support 14. Also, the rod 70 may be shaped to adjust the position of the pad member 52. The central portion of the U-shaped rod 70 is preferably secured to the plate 62 as by fasteners or the like.

The strap assemblies 18 each preferably include first and second straps 80 and 82 connected at common ends to a common securement strap 84 having a hook material on the interior surface thereof so as to be positionable in releasable engagement with the exterior surface 22 of the laminate 16 of the anterior support 14, as seen in FIG. 1. The opposite free ends of the straps 80 and 82 include a hook material on the interior surface thereof so as to be positionable in releasable engagement with the exterior surface 22 of the laminate 16 of the anterior support 12. D-rings 86 or the like may be located on the ends of the straps 80 and 82 to facilitate grasping thereof. Slides or chafes 88 are preferably secured to the exterior of the posterior support 12, with the straps 80 and 82 passed therethrough.

To install the brace 10, the user places the posterior support 12 around the posterior body portions and, while holding this in place, places the anterior support 14 over the anterior body portions, and slightly overlapping the anterior support 12. This process is facilitated by having one of the strap assemblies secured to both of the supports 12 and 14. Next, the user may secure both of the strap assemblies 18 by pressing the securement straps 84 into firm engagement with the surface 22 of the posterior support, and then pulling on the D-rings 86, one at a time or two at a time, and then securing the hook material associated with such ends in engagement with the loop material of the exterior surface 22 of the anterior member 14. The user may adjust the compression and fit of the brace 10 by adjusting the locations and orientations of the securement straps 84 or the opposite free strap ends, or both.

The foregoing description of certain exemplary embodiments of the present invention has been provided for purposes of illustration only, and it is understood that numerous modifications or alterations may be made in and to the illustrated embodiments without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A spinal orthosis for treating a spine, comprising: an anterior support and a posterior support having an elongate aperture provided on the posterior support at a location corresponding to the location of the spinal column of a patient wearing the orthosis, the anterior and posterior supports each comprising a laminate made of a flexible foam material and a substantially rigid plastic sheet material sandwiched between a pair of soft flexible sheet materials and bonded together to yield a unitary and substantially rigid laminate material.

2. The orthosis of claim 1, wherein the posterior support further comprises a rigidifying member located adjacent the aperture to provide additional rigidity along sides of the aperture.

3. The orthosis of claim 2, wherein the rigidifying member is external to the posterior support.

4. The orthosis of claim 3, wherein the rigidifying member comprises an elongate substantially rigid member secured to the posterior support.

5. The orthosis of claim 2, wherein the rigidifying member is incorporated into the laminate material of the posterior support.

6. A spinal orthosis for treating a spine, comprising: an anterior support and a posterior support, each comprising a laminate made of a flexible foam material and a substantially rigid plastic sheet material sandwiched between a pair of soft flexible sheet materials and bonded together to yield a unitary and substantially rigid laminate material; and a sternal pad system attached to the anterior support, the sternal pad system including a substantially U-shaped pad member configured for cradling the sternum of a patient; a pair of side mounting members, each secured to the pad member and to the anterior support; and a central adjustable mounting system located between the side mounting members, the central adjustable mounting system including a rigid extension that is adjustably positionable to span between the anterior support and the pad member to permit adjustment of the height of the pad member relative to the anterior support.

7. The orthosis of claim 1, further comprising one or more straps attachable to the posterior support and the anterior support for securing the spinal orthosis on a patient.

8. A spinal orthosis for treating a spine, comprising: an anterior support, a posterior support, each support comprising a laminate made of a flexible foam material and a substantially rigid plastic sheet material sandwiched between a pair of soft flexible sheet materials and bonded together to yield a unitary and substantially rigid laminate material; and a thoracic support extending above and adjustably positionable relative to the posterior support for adjusting the kyphotic curve imparted to a thoracic region of the spinal column of a patient.

9. A spinal orthosis for treating a spine, comprising: an anterior support, a posterior support, each support comprising a laminate made of a flexible foam material and a substantially rigid plastic sheet material sandwiched between a pair of soft flexible sheet materials and bonded together to yield a unitary and substantially rigid laminate material; and a sternal pad system attached to the anterior support for desired positioning of an upper thoracic region of a patient, the sternal pad system including a substantially U-shaped pad member configured for cradling the sternum of a user, a pair of side mounting members, each having a first end configured for mounting to the pad member and a second end configured for mounting to the anterior support, the first ends being angled so that they can be reversed to change the mounted position of the pad member relative to the support, and a central adjustable mounting system including a support mount, a pad member mount, and a rigid extension that spans between the support member mount and the pad member mount.