LT5450B - Orthopedic iron of ankle-foot - Google Patents

Abstract

The invention relates to medical devices. Ankle - foot orthopedic iron comprises a frame, which is made from light and hard composite of carbon fibre and a lower part of a frame beside inside foot arc is connected with tread, a top part at a leg is fixed in cover, A curve at a top part of a heel overpasses into straight part, leaving Achilles tendon. Two offsets are disposed beside lower part of a shin, which by holders include a shin at top part and a front part of a tread is less stiff than part at a heel, compared with central stiff part of tread.

Description

The invention relates to the field of medicine, namely to the conservative treatment, anchoring or immobilization of the ankle joint. The design of the dentures restores the patient's foot displacement function (for example, in the case of "falling: the foot", after surgery of the foot and calf, tendons of the ankle). The sleeve lifts the foot in the ejection phase and limits the planetary flexor. The design of the provided splint provides the patient with maximum movement comfort without: reducing the inconvenience of using splints. The sleeve is made of a lightweight and durable carbon fiber composite. The insole adapts to the same size footwear that the patient normally wears, and due to its slim design, it is invisible under clothing.

Known ankle-foot splint, in which the carbon fiber composite carcass comprises the anterior portion of the calf and has a curvature in the inner foot (see No. WO2004043289, May 27, 2004).

The disadvantage of such a brace is insufficient movement of the patient and immobilization of the foot. Also, over the long term, the placement of the carcass in the front of the lower leg will inevitably cause pressure to numb the legs.

Known collar consisting of a frame made of carbon fiber composite ii having a cap on its upper part which secures the collar to the leg. The sole of the insole consists of several layers of carbon fiber, the curvature is on the outside of the foot, and the carcass covers the front of the shin (see PCT / SE97 / 01253, published YVO98 / 34572, 13/08/1998).

The disadvantages of such an insole are its inadequate handling efficiency and limited patient mobility.

Known ankle-foot composite of Otto Bock HealthCare GmbH, made of lightweight and durable carbon fiber composite, the lower part of the ankle frame at the inner foot arch is joined to the sole, and the curve at the upper part of the heel moves to a straight part and extends to the calf supports. .to Otto Bock HealthCare GmbH booklet, 2005)

The disadvantage of such a brace is the inadequate movement of the patient due to insufficient movement of the front of the foot and insufficient fixation of the calf.

In addition, the lack of flexibility in the front of the sole and heel makes the patient more tired.

The object of the invention is to improve the patient's movement function and efficiency of use.

In the provided ankle-foot orthopedic insert, consisting of a lightweight and durable carbon fiber composite, the lower part of the carcass is connected to the sole at the inner foot arch, the upper part is attached to the foot and the upper part of the heel transitions to a straight part, without touching the Achilles tendon, the new is that the mandible at the lower part of the calf has two protrusions that support the calf in the upper part, and the front of the sole is less stiff than the middle part of the heel.

The two arms of the collar frame at the lower part of the calf and the calf brackets evenly cover the lower leg so the brace fixes the lower leg better and improves lower leg support, preventing the patient from making unnecessary movements. The bandages cover a larger area of the lower leg and therefore have a lower risk of irritation and abrasion of the lower leg. Due to the design of the brackets and the flexibility of the frame arms, which is obtained by applying a smaller number of coating layers, the mandrel is adapted to a larger number of patients. The placement of the layers of the sole is such that the front and heel sections are more flexible than the middle, and this sole design provides a "springing" effect as the patient moves, making the patient less tired when moving. The sole of the sole and the heel are flexible enough to help restore natural gait. In the case of post-ankle surgery, a patient's limited flexion of the foot at the toes and heel transmits to the tissue tendons, resulting in improved blood circulation and healing of the ankle joint. In addition, the flexibility of the heel portion of the brace limits the kickback of the heel to the base during the first phase of the step. The part of the collar frame extending from the sole to the top is more flexible due to the number of longitudinal layers of carbon fiber to be covered.

The insole is well suited for rehabilitative treatment after an ankle fracture. It fixates the inner tibia of the tibia so that after removal of the plaster the patient can undergo therapeutic exercise and immobilization with a splint. The insole immobilizes the foot firmly and prevents excessive flexion (flexion) and extensional (flexion) movements of the chio joint.

The design of the ankle-foot orthopedic brace is shown in FIG. 1, the brace with the sleeve in FIG. 2, the sleeve structure in FIG.

The ankle-foot orthopedic brace consists of a carcass 1, which passes into a straight part 2 at the heel and extends into two legs 3 at the lower part of the calf, the upper part of which has flexible lower leg supports 4. The lower part of carcass 1 is connected to the sole 5 A sleeve 6 is applied to the holders 4, which secures the brace with the contact adhesive strips 7 on the patient's shin. The sole is made of at least five layers of carbon fiber composite. The coating layers 8 and 9 are made of a transverse carbon fiber composite and the middle layers 10, 11 and 12 are made of a longitudinal carbon fiber composite. Depending on the size of the mandrel, the inner layers of carbon fiber are spaced apart. The front of layer 10 is placed at the toe-finger joint, the front of layer 11 at the middle of the calipers, and the front of layer 12 at the ankle joint to provide sufficient flexibility at the toes.

The ankle-foot orthopedic splint is used as follows.

The patient puts a dent on the sock. The liner has no direct contact with the patient's skin. The patient's foot is placed on the sole 5 of the mandrel frame 1, which is lined with lining. The lower leg is secured between the brackets 4 of the carcass 1 and fastened by the fastening of the adhesive strips 7 in the sleeve 6. The sleeve is used only with footwear that is closed, with firm boots, to enhance the function of the brace.

Compared to the prototype, the design of the ankle-foot orthopedic splint gives the patient comfort of movement and allows for a more efficient use of the splint.

Mechanical tests were performed to determine the stiffness of the front and heel of the sole.

The mechanical tests were carried out at the Strength and Degradation Mechanics Center, licensed under No. 4/2000 issued by the State Nuclear Power Safety Inspectorate (VATESI) to carry out scientific, technological research and safety assessment in the field of nuclear energy of the Republic of Lithuania.

The AFO-IOS and Walk-ON stiffness of the L- and S-size anchors were tested at the mid-heel region 50 mm from the tip of the sole. in incisions. A transverse-loaded biaxial beam model was used to investigate the stiffness of the stiffeners in the mid-section of the rocks (Fig. A). The specimens were loaded with a fixed load of 40 kg (392.5 N) and the deflection Δ / was measured. A transverse load bearing brace model (Fig., B) was used to investigate the stiffness of the heel part. Measured force F, required to tilt the tip of the mandrel at a distance of 15 mm from equilibrium.

Fig. duct test schemes

The mean values of the test results are given in the table. Table

Insole Mid-section deflection of stings, 15 mm heel part (force required to reach the link, kg (N) mm while operating size load 40 kg (392.5 N) AFO-IOS The size of S 16.3 ± 1 14.2 ± 0.5 (139.3 ± 4.9) The size of L 18.7 ± 1 4.5 ± 0.5 (44.1 ± 4.9) Walk-ON The size of S 15.3 ± 1 23.5 ± 0.5 (230.5 ± 4.9) The size of L 11.3 ± 1 5 ± 0.5 (49.0 ± 4.9)

In the mid-section of the flanks, the AFO-IOS splints can be said to be 6.1% -39.6% lower in stiffness than the Walk-ON splints. In the heel section, the AFO-IOS stiffness is 10% * 36.6% lower than Walk-ON.

Claims (1)

DEFINITION OF INVENTION An ankle-foot orthopedic brace consisting of a lightweight and durable carbon fiber composite, the lower part of the carcass is connected to the sole at the inner foot, the upper part is attached to the foot, and the curve at the upper part of the heel goes to the straight part Achilles tendon, characterized in that the lower part of the calf has two protrusions which support the calf in the upper part and the front of the sole is less stiff than the part at the heel as compared to the middle rigid part of the sole.