RU216507U1 - Ankle orthosis - Google Patents

Abstract

The utility model relates to medicine, namely to helping injured people move, especially people with ankle fractures, and can be used in hospitals and physical rehabilitation centers. The technical result consists in reducing the load on the ankle joint, preventing joint stiffness, protecting the ankle joint from side effects and accelerating the recovery process, and also works to improve the pattern of the patient's walking cycle. The essence of the utility model lies in the fact that the ankle joint orthosis includes a damper, bolts, straps, the sole of the orthosis, while the orthosis is made of polypropylene, and includes a hinge joint attached to the sole of the orthosis from behind, two bolts, made with the possibility of fastening the damper to orthosis, a third for attaching the damper to the hinge joint from below, and three rivets for attaching the orthotic insole to the sole of the orthosis.

Description

The utility model relates to medicine, namely to helping injured people move, especially people with ankle fractures, and can be used in hospitals and physical rehabilitation centers.

It is known that orthopedic appliances are usually made of polyethylene or polypropylene with pads to stabilize the foot, some of these models are a fixed fixed frame. As for the others, it contains frames that articulate with each other in places corresponding to the junction. The ankle joints perform full or limited mobility with dorsal or plantar flexion.

Known apparatus for the ankle joint (see Kuzhekin A.P., Moreinis I.Sh., Yakobson Y.S., Golovin V.S., Business V.I., Shishkin B.V., Ezhov M.D., Bolkhovitinov S.V., Tsybulnikov V.S., Zuevsky S.E. (Apparatus for the ankle joint / / In the textbook for technical schools: Design of prosthetic and orthopedic products. M .: Light and food industry, 1984 - C . 93-96), which consists of a leather shoe with a metal insole, four metal splints located on the sides of the leather sleeve of the lower leg. The leather shoe is connected to the splints of the lower leg with the help of hinges.

The closest technical solution is an apparatus for the ankle joint (U.S. Pat. RU No. 2140230, A61F 5/01, published 10/27/1999), including a metal frame consisting of tires hinged to each other, to which devices are attached to fix the apparatus on the limb , at the same time, two polyethylene splints with five fixing straps are attached to the metal tires in the center, two of which fasten the footrest with replaceable heels, which provides the possibility of early dosed loading on the operated limb.

The disadvantage of this device is that it is of limited use as it is usually used only in people suffering from foot drop problems, as it does not work to reduce the load applied to the ankle joint, nor does it work to improve the picture of the patient's gait cycle.

The purpose of the utility model is to provide a reduction in the load on the ankle joint, prevent joint stiffness, protect the ankle joint from side effects and accelerate the recovery process.

The essence of the utility model lies in the fact that the ankle joint orthosis includes a damper, bolts, straps, the sole of the orthosis, while the orthosis is made of polypropylene, and includes a hinge joint attached to the sole of the orthosis from behind, two bolts made with the possibility of fastening the damper to the orthosis, the third for fastening the damper to the hinge joint from below and three rivets for fastening the orthotic insole to the sole of the orthosis.

The technical result consists in reducing the load on the ankle joint, preventing joint stiffness, protecting the ankle joint from side effects and accelerating the recovery process, and also works to improve the pattern of the patient's walking cycle.

The essence of the utility model is illustrated by the drawing, where:

figure 1 shows the proposed device;

fig. 2 - the patient before and after the recovery phase;

fig. 3 - on the left - walking of the patient with pathology without wearing the device and on the right - together with the device;

fig. 4 - walking cycle parameter in the form of a butterfly path center of pressure, without wearing the device;

fig. 5 - walking cycle parameter in the form of a butterfly path center of pressure, wearing the device.

The device includes an orthosis 1 made of polypropylene, a damper 2 attached to it with bolts 8, used to reduce the load on the ankle joint, two bolts 8 connect the damper 2 with the orthosis 1 and one with the hinge joint 3, the hinge joint 3 is fixed to the sole of the orthosis 4 at the back, which simulates the movement of the ankle joint during (plantar flexion and dorsiflexion), the sole of the orthosis 4 is made of aluminum, covered with a layer of polyethylene on the bottom to reduce noise when walking, three straps 5 are installed to fix the device on the limb, one to fix the foot, and two belts at the top for fixing the leg from below from the knee to the ankle joint on the front side of the orthosis, there is a calibration screw 6 on the damper 2, which controls the distance between the sole of the orthosis and the orthosis, there are three rivets 7 for fastening the orthotic insole to the sole of the orthosis in front.

The device works as follows.

The device is designed to reduce the load on the ankle joint and regulate the patient's walking cycle, it can also be adjusted using a 28 mm long M8 calibration screw 6, which controls the distance between the sole of the orthosis 4 and the orthosis 1. There is a smooth change in the angle along the articulation joint 3 , which is necessary in order for the ankle joint to move at different angles of flexion and extension in the range from (25° plantar flexion to 0° dorsiflexion) with the help of a fixed hinge joint 3 on the sole of the orthosis 4. Straps 5 allow fixing the foot, one for fixation foot, and two straps 5 at the top for fixing the leg from the bottom from the knee to the ankle joint on the front side of the orthosis 1. This device is adjusted to the limbs of different sizes by tightening or loosening the straps 5.

The use of the proposed device for the ankle joint provides many of the following positive effects:

1. Reduces the risk of ankle stiffness or re-rupture of the Achilles tendon after surgery.

2. Provides additional comfort to the patient when walking during the rehabilitation process.

3. Provides ankle mobility (dorsiflexion and plantarflexion) and reduces stress on the ankle joint during the walking cycle.

4. Improves the patient's gait during the walking cycle.

5. Installation of the device is not difficult, which allows you to adjust and install it on the patient's leg with greater speed.

Clinical example: Patient A., aged 26, height 168 cm, weight 60 kg. The operation was performed in connection with an injury to the right ankle joint. Columns were placed to stabilize the leg and foot (external fixation) FIG. 2. 16 days after the operation, the sutures were removed. After 8 weeks from the date of surgery (external fixation) was removed and the proposed orthosis was used, Fig. 3, the victim's limb was fixed with straps and allowed to walk in the apparatus on crutches 3 times a week, each time 50 steps, for two weeks, 10 weeks after the operation, the victim was allowed to walk without crutches in the apparatus, with full weight bearing on the operated foot for 14 days. Thereafter, the patient was allowed to walk on the treadmill (Zebris FDM-T) without the apparatus and again with the apparatus to ensure the effectiveness of the apparatus.

The results are shown briefly, the graphs in Fig. 4 are footprints of the victim (on the left - the left foot, on the right - the right foot, and in the center both feet protrude in the form of butterfly wings).

In FIG. 5, the butterfly wings do not align because the victim cannot transfer full weight to the left leg when the apparatus is not worn during the walking cycle, and in FIG. 6 shows that the wings of the butterfly are almost the same or the same for both legs. This means that the affected person can bear full weight on the right leg while wearing the device during the walking cycle, indicating that the device is working well.

The use of the proposed orthosis on the ankle joint increases the efficiency of rehabilitation of patients with injuries of the ankle joint by dosing the load and controlling the angles of flexion/extension of the joint and reactive forces (stresses) acting in the process of therapeutic exercises and walking.

Claims (1)

Orthosis for the ankle joint, including a damper, bolts, straps, the sole of the orthosis, characterized in that the orthosis is made of polypropylene and includes a hinge joint attached to the sole of the orthosis from behind, two bolts made with the possibility of attaching the damper to the orthosis, the third for attaching the damper to hinge joint from below and three rivets for attaching the orthotic insole to the sole of the orthosis.

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