The invention relates to a foot lift orthosis.
Foot drop, where the foot is in a “supination” position, is common following a stroke, for example, but can also have other causes. When foot drop occurs, the front of the foot can no longer be sufficiently lifted, and therefore the risk of tripping is significantly increased.
A number of different foot lift orthoses for counteracting this issue are known from the prior art. One of the foot lift orthoses having the simplest design consists of a cast that is positioned around the wearer's leg above the ankle, and which comprises straps or tension elements that are connected to the shoe, in particular to laces of a shoe. An upward force is exerted on the shoe as a result, which force therefore also lifts the foot. However, a disadvantage is that an orthosis of this type cannot be worn barefoot or with all types of shoe, and can easily been seen by others from the outside.
Alternatively, the tension element originating at the cast arranged above the ankle can also be arranged on a second cast which surrounds the foot in the frontal foot region. The tension element thus tensions an approximately diagonally extending tension connection between the wearers foot and leg, and therefore a foot lift orthosis of this type cannot be worn with a shoe. Moreover, the forefoot is compressed in the peripheral direction by the surrounding cast which applies the force to the foot, which is often to be avoided from a therapeutic point of view. Rather than lifting the whole foot, an upward force that is only exerted on the forefoot instead allows the foot to “flex,” resulting in the foot being stretched or even overstretched. This is not advantageous either.
Another type of foot lift orthosis comprises a stable sole element that extends over a smaller or larger part of the sole of the foot. Said element is made of carbon fiber composite, for example, and connected to a support device that is generally arranged on the patient's lower leg. The stable sole plate that extends along and underneath the foot lifts the foot, and thus also lifts the front of the foot. However, most of these foot lift orthoses require a surrounding shoe, and in particular cannot be worn barefoot because they can be easily seen from the outside. It is also not possible to achieve the feeling of being barefoot because the sole of the foot is largely covered by the sole element.
The problem addressed by the invention is therefore that of proposing a foot lift orthosis that can also be worn barefoot and is easy to clean, while nevertheless being cost-effective and simple to produce.
The invention solves the stated problem with a foot lift orthosis comprising at least a first tension element designed to extend from a frontal region of a foot along an instep of the foot and to exert, on the frontal foot region, a first tensile force toward a first support position above an upper ankle joint when the foot lift orthosis is being worn, and also comprising at least a second tension element designed to exert, on the frontal foot region, a second tensile force toward a second support position in a heel region of the foot when the foot lift orthosis is being worn.
The second tension element is advantageously designed to extend from the frontal foot region along a sole of the foot when the foot lift orthosis is being worn.
The foot lift orthosis according to the invention therefore has two tension elements, of which the first tension element extends over the instep and the second tension element preferably extends along the sole of the foot. One end of each of the two tension elements acts on the frontal foot region, for example in the region of the ball of the foot, and exerts a tensile force on said frontal foot region. The first tension element exerts a tensile force that is oriented toward the first support position, which is located above the upper ankle joint. The foot region is lifted as a result, and the function of the foot lift orthosis is therefore ensured. The second tension element simultaneously exerts a second tensile force that extends approximately or completely in parallel with the sole of the foot and thus prevents the foot from flexing. Since both applied tensile forces act in the frontal foot region, said forces result in the foot being “compacted.” Both forces in combination therefore ensure that the foot is held by a force oriented toward the heel, such that in particular the plantar fascia, i.e. the aponeurosis of the foot, is tensed. Any adverse flexing of the foot by means of the upward forces acting on the forefoot, as is possibly known from the relevant prior art, is prevented in this way.
Since the first tension element extends along the instep and the second tension element preferably extends along the sole of the wearers foot, the orthosis is very discreet and can be used with and without a shoe, and in particular can also be used barefoot. Since the foot lift orthosis is in contact with almost the entire surface of the foot, it is not immediately noticeable provided that it is made of a transparent or skin-colored material, and can therefore be worn inconspicuously even barefoot.
The first tension element and the second tension element are advantageously interconnected in the frontal foot region, and are preferably integral with one another. This one-piece embodiment can be made of silicone, for example. However, it is possible in this case to design the two tension elements having different thicknesses or different widths and thus to produce tensile forces of different intensities, even when identical materials are used and the two tension elements are integral with one another. Of course, it is also possible to make one or both of the tension elements out of silicone and to interconnect said elements in the frontal foot region in a different way.
The second tension element preferably has an opening such that said element can be wrapped around the heel of the foot. In this case, putting on the foot lift orthosis is particularly easy in the region of the second tension element because the second tension element just needs to act in the frontal foot region, and the wearer's heel can then be guided through the opening in the second tension element. In this way, the heel acts as a counterweight for the second tensile force applied by the second tension element. Alternatively or additionally, it is possible to provide enclosing means for the foot that act as a counterweight for the second tensile force in this way. A tab or other grip element that further simplifies the process of putting on the orthosis can also be provided.
The first tension element advantageously has at least one opening such that said element can be wrapped around an ankle region. The first tension element extends around the wearer's leg once above the ankle, such that said leg acts as a counterweight for the first tensile force. In order to put on the foot lift orthosis, the foot is simply guided through said opening in the first tension element, a connection region between the first tension element and the second tension element is arranged in the frontal foot region and the heel is subsequently advantageously guided through the opening in the second tension element. Since it is not necessary to fasten any bands or straps or tie any shoelaces or cords, the foot lift orthosis can be put on in an easy and reproducible manner.
The first tension element preferably follows the extension of the plantar fascia. Particularly advantageously, only a small part of the sole of the foot is covered in this case, in particular the region of the ball of the foot, in order to give the wearer as far as possible the feeling of actually walking barefoot when the foot lift orthosis is worn directly on the foot, i.e. without socks, stockings or shoes.
In a particularly preferred embodiment, the foot lift orthosis comprises at least one supporting link that extends upward from the first support position and can be guided around the wearers lower leg. This occurs in particular in the posterior region of the wearer's leg. In this way, tensile force applied by the first tension element is thus deflected toward the posterior. When the foot lift orthosis is being worn, the supporting link extends upward on the wearers lower leg and is then guided around the lower leg. The tensile force applied by the first tension element can also be altered in this way, and in particular increased. The enclosing means around the lower leg, which are part of the supporting link, are advantageously designed such that they can be reversibly opened and closed. This can for example be achieved by means of a button or an interlocking connection element, e.g. via hook and loop closures. This significantly simplifies the process of putting on and taking off the foot lift orthosis.
At least one opening through which at least one toe of the foot extends when the orthosis is being worn is advantageously located between the first tension element and the second tension element. Of course, it is also possible to provide an opening through which more than one toe extends, and/or to provide at least one opening, and advantageously a plurality of openings, with one toe extending through each opening. This occurs in the connection region between the first tension element and the second tension element, which region can be designed as a separate component that is connected to the first tension element and to the second tension element, or as a transition region between the two tension elements. Needless to say, it is also conceivable for said region to be integral with the first tension element and with the second tension element such that the opening is provided in a silicone element, for example. The tensile force that can be applied by each of the two tension elements is applied in said transition region between the first tension element and the second tension element, such that the toes are secured in the opening through which at least one toe of the foot extends. Of course, it is also possible for an opening through which all the toes are guided to be located in said region such that the foot lift orthosis is only supported on the ball of the foot in the frontal foot region.
The foot lift orthosis preferably comprises at least one reinforcement element that can be fastened on the lower leg and extends along the instep such that the first tensile force that can be applied by the first tension element can be increased. The at least one reinforcement element is in particular a separate component, and can therefore easily be replaced by another reinforcement element. In this way, the total force that can be applied by the foot lift orthosis can be individually adjusted to the wearer's needs particularly easily, and if necessary can be adapted to changing situations during treatment, for example a progressive recovery. One end of the at least one reinforcement element can comprise a securing device by means of which said element can be secured to the wearer's lower leg. This too is achieved by enclosing means that can be detachably fastened using a closure element. The opposite end of the reinforcement element can be arranged on the first tension element by means of interlocking connection means, or in another way. This advantageously occurs as close as possible to the frontal region of the foot, such that a tensile force can also be exerted on said frontal foot region by means of the reinforcement element. It has shown to be advantageous when the reinforcement element is arranged on the wearer's lower leg in such a way that said element is also enclosed by the supporting link and the enclosing means of the lower leg thereof, in order to ensure that the foot lift orthosis is overall as discreet as possible.
The foot lift orthosis preferably comprises at least one stabilizing element that extends around the frontal foot region when the foot lift orthosis is being worn.
In an embodiment that is particularly simple to produce and particularly easy to clean, the foot lift orthosis is made of silicone and is advantageously formed in one piece. In this case, the entire foot lift orthosis consists of a single silicone element in which the required openings are advantageously located. When not being worn, said orthosis can be folded up so as to be particularly small such that it is simple to store, transport and put on, and is in particular impervious to salt water and easy to clean. A reinforcement element can also be designed as a separate component in this case. Said element is preferably produced from the same material as the rest of the foot lift orthosis.
If the foot lift orthosis is a separate element that is in particular made of silicone and produced from a single workpiece, it is advantageous for the foot lift orthosis to be individually adaptable. It goes without saying that this is also advantageous for foot lift orthoses formed in a plurality of pieces or other types of foot lift orthosis.
Said individual adaptability can for example be achieved by making it possible e.g. for openings or holes that are provided in the foot lift orthosis to be produced and cut into the foot lift orthosis individually. These can be, for example, cut-outs or openings through which the heel projects when the foot lift orthosis is being worn. A further opening, which can preferably be designed individually, is intended for the toes of the foot when the orthosis is being worn. The access opening through which the foot is guided when the foot lift orthosis is being put on can preferably also be customized in this way. The position and/or the size of at least one of said openings, but preferably of a plurality or all of said openings, can preferably be adjusted. Feet of different sizes, for example, can be accommodated in this way, e.g. because the spacing between the opening for the heel and the opening for the toes can be increased or decreased. In a preferred embodiment, the required openings are cut into the material of the foot lift orthosis using scissors or another cutting tool, for example. Marking lines which mark particular shoe sizes for which the orthosis is intended to be suitable, for example, can be provided on the foot lift orthosis for this purpose. An orthopedic technician or the wearer of the orthosis then simply has to cut the desired opening into the material of the foot lift orthosis along the line that is suitable for them, and in this way can create a foot lift orthosis that is individually produced for them. In particular, unique physical features and the individual condition of the relevant foot can be catered for in this way.
In addition to the size and particular physical characteristics of the relevant foot, it is also possible to accommodate the toes by allowing the size of the hole for the toes to be varied, for example, and to thus design the foot lift orthosis to be as comfortable as possible. It is therefore possible to cut a plurality of holes into the material of the foot lift orthosis with each hole being for one toe, or to cut one hole for a plurality of toes. Combinations of these hole configurations can also be used, of course.
Alternatively, it is also possible for the foot lift orthosis to comprise a stocking made of a textile material on which the first tension element and the second tension element are arranged, preferably bonded or molded. Said stocking is preferably provided with an anti-slip coating on an inner side thereof that faces the foot. The coating can be applied over the whole surface or in regions, preferably in the heel region, the ankle region and/or the frontal foot region. A silicone coating is preferably used.
An embodiment of the present invention is described in more detail in the following with references to the attached drawings, in which:
The second tension element 4 that also acts in the frontal region 6 of the foot 8 extends along a sole 20 of the foot as far as a second support position 22 in the region of the heel 24 of the foot 8. The second tension element 4 has an opening 26 through which the heel 24 extends, and the first element 2 in the embodiment shown in
Two openings 32 are shown in the frontal foot region 6, a toe 34 extending through each of said openings.
The opening 26 in the second tension element 4, through which the heel 24 can be guided, is located at the end of said element that is opposite the openings 32. The opening 28 is located at the end of the first tension element 2 that is opposite the openings 32. In this case, in order to put on the orthosis, the foot is guided through the opening 28, and the region between the two tension elements 2, 4 in which the openings 32 are located is subsequently arranged on the toes and in the frontal region 6 of the foot. The first tension element 2 is tensioned as a result and already exerts a tensile force on the forefoot 6. The second tension element 4 can then be tensioned along the sole of the foot, and the heel 24 can be guided through the opening 26. The tab 38 can be gripped for this purpose, making it significantly easier to put on the foot lift orthosis 1. In addition, the supporting link 14 is also arranged along the lower leg and the enclosing means 18 are closed in order to put on the orthosis.
The particular sectional shape, shown in particular in
The closure of the surrounding means 18 remains in its place by means of the supporting link and cannot slide down in the direction of the talus.
Number | Date | Country | Kind |
---|---|---|---|
102016109963.5 | May 2016 | DE | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/EP2017/062976 | 5/30/2017 | WO | 00 |