RU2788420C1 - Orthopedic insert for lower limb shortening compensation - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention relates to medicine. Orthopedic insert to compensate for the shortening of the lower limb, the length and width of which correspond to the length and width of the foot in the respective areas, and the height is determined by the shortening. On its lower surface, closed and rounded blind cuts of various diameters are made, not touching each other and with the edges of the insert.

EFFECT: invention provides a better recovery of the anatomical functions of the foot and the body as a whole when walking and moving due to the fact that the implementation of the proposed insert in accordance with the invention makes it possible, due to blind cuts, to stretch the material from the outside when the foot is bent during a step and at the same time allows you to maintain the density of the material and to avoid heat loss, and due to the additional implementation of through holes and recesses, additional flexibility arises by creating space for the surface to compress inward during the step, the voids allow to reduce the difference in weight between the soles on the long and short legs.

7 cl, 7 dwg

Description

The orthopedic insert for a shortened lower limb belongs to prosthetic and orthopedic (rehabilitation) products and can be used in creating various elements of lift therapy: for making the sole of a new shoe; for additional inserts for increasing the height already in finished shoe soles; to increase the flexibility of the inner insole, etc. in the manufacture of shoes for a wide range of purposes for all age groups of users.

Known orthopedic insert for a shortened lower limb (utility model patent, RU 187728, IPC A41V 7/00, pub. 03/15/2019), including a rigid orthopedic part, made in the form of a solid sole, the length of which corresponds to the length of the foot, the height from the heel is equal to the difference in the lengths of the legs, and the part of the liner in the shank part of the foot is made with through holes, the diameter of which and the distance between the centers of the holes are determined by the weight of the person.

However, said bevelled liner does not compensate for the shortening along the entire length of the foot and has insufficient flexural deformation.

Known adopted as a prototype orthopedic liner for a shortened lower limb, made of plastic, the length and width of which correspond to the length and width of the sole in the respective areas, and the height is determined by shortening, while on the entire flat surface of the liner, vertical through holes with a diameter of 12-20 mm are made, matching in size (cellular technology) (https://www.pinterest.com, Honeycombing Service | Basic shoes, Legs, Orthopedic). Instep modifications for different leg lengths using honeycomb technology allow the shoe to be lighter in weight and more flexible.

However, as in the above analogue, adopted for the prototype of the liner does not have sufficient bending deformation, resulting in him: broken gait (pulling legs) and posture (transfer support).

The present invention solves the problem of creating an orthopedic liner with improved performance by increasing flexibility, as well as reducing the risk of shrinkage of its extended part under heavy loads or when using a material of low rigidity, and maintaining heat in the half-pair increased with the help of the proposed liner in the cold season, which leads to a better recovery of the anatomical functions of the foot and the body as a whole when walking and moving.

The task is solved by an orthopedic insert to compensate for the shortening of the lower limb, the length and width of which correspond to the length and width of the foot in the corresponding areas, and the height is determined by the shortening, on the lower surface of which closed and rounded blind (non-through) incisions are made, of various diameters, not in contact with each other and with the edges of the liner.

To maintain density, the heel area can be made integral.

To increase the flexibility of the liner, through holes of different diameters can be located between the blind incisions and/or along the perimeter of the liner.

To provide additional flexibility to the top layer of the liner and reduce weight, recesses of various diameters can be made on the upper surface of the liner, not in contact with blind notches.

The recesses may be located coaxially with the outer circumferential notches and/or between blind notches and/or along the perimeter of the liner.

In addition to them, through holes can be made.

For people with a lot of weight, as well as to protect against sagging (loss of compensation height), when using a softer material, through holes with rounded edges are located at the foot support points, into which sealing inserts made of a material of greater rigidity are inserted.

The technical result of the invention consists in a better restoration of the anatomical functions of the foot and the body as a whole when walking and moving due to the fact that the implementation of the proposed insert in accordance with the invention makes it possible, due to blind incisions, to stretch the material from the outside when the foot is bent during the step and at the same time allows maintain the density of the material and avoid heat loss. And by providing additional through holes and recesses, there is additional flexibility by creating space for the surface to compress inward when stepping. All voids reduce the difference in weight between the soles on the long and short legs.

An analysis of known technical solutions allows us to conclude that the proposed invention is not known from the state of the art under study, which indicates its compliance with the criterion of "novelty".

The essence of the present invention for specialists does not follow explicitly from the prior art, which allows us to conclude that it meets the criterion of "inventive step".

The possibility of making the liner using standard tools with the achievement of the task at hand indicates the compliance of the invention with the criterion of “industrial applicability”.

On FIG. 1 shows a photo of the lower surface of the liner, on which blind cuts are made.

On FIG. 2 shows a photo of an insert made in accordance with the prototype (A) and the proposed invention (B) and a demonstration of their flexibility, at a load of 8, where:

C - demonstration of the flexibility of the prototype

E - demonstration of the flexibility of the liner made in accordance with the invention.

On FIG. 3 shows a photo of the lower surface of the liner on which the heel area is left intact.

On FIG. 4 shows a photo of the lower surface of the insert, between the blind cuts and along the perimeter of which there are through holes of various diameters.

On FIG. 5 shows a photo of the upper surface of the insert, on which recesses of various diameters are made.

On FIG. 6 shows a photo of the upper surface of the insert, on which recesses of various diameters and through holes are made.

The following examples confirm, but do not limit, the present invention.

Materials: The liner material can be any solid material that will allow the invention to be carried out. Ethylene vinyl acetate (EVA) is currently the most commonly used for lift therapy. Natural rubber, dense foams from sports shoes, etc. can also be used.

Tools: Making holes, recesses and cuts is carried out with nozzles for a screwdriver and a construction or shoe knife.

Example 1. Production of an insert, on the lower surface of which closed and rounded blind (non-through) cuts of various diameters are made, not touching each other and with the edges of the insert. From a solid material, which is taken as ethylene vinyl acetate (EVA), a liner blank is created, the length and width of which correspond to the length and width of the foot in the corresponding sections, and the height is determined by shortening, and closed and rounded blind (non-through) cuts are made on it on the lower surface, different diameters, non-contact with each other and with the edges of the liner. At the same time, to increase the service life of the liner, the notches are arranged so that at least 1 cm remains to the edge of the workpiece. To reduce heat loss, the wall thickness of blind notches is less than 0.5 mm. (see Fig. 1). On FIG. 2 shows a photo of an insert made in accordance with the prototype with through holes in the sole (A) and with the invention (B) and a demonstration of their flexibility under a load of 8 kg (EVA shore hardness, size and height are identical in comparison). The difference in weight was 10 grams. With a load of 8 kg, the prototype bent by 14 mm. With cuts over the entire surface, the liner was bent by 21 mm. That is, only the placement of notches over the entire surface gives an increase in flexibility by 50% compared to the prototype. The photo also shows the difference in the thickness of the slot. Making blind incisions allows the material of the liner to stretch from the outside when the foot is bent during the step and at the same time, unlike the prototype, maintains the density of the material and avoids heat loss.

To maintain density, the heel area can be made integral (see Fig. 3), which allows the liner to flex under the same conditions as described above by 19 mm. At the same time, the structure of the material is preserved when walking in the area of the main support of the liner, which increases its service life.

Example 2. Manufacture of an insert, on the lower surface of which closed and rounded blind cuts are made, between which and along the perimeter of the insert there are through holes of various diameters.

The same as in example 1, only on the lower surface of the liner, through holes of various diameters are made, placing them both between blind cuts and along the liner perimeter (see photo in Fig. 4). this production of the liner allows you to increase its flexibility by creating space for the surface to compress inward during the step. All voids reduce the difference in weight between the soles on the long and short legs.

Example 3. Manufacture of an insert, on the lower surface of which closed and rounded blind cuts are made, and on the upper surface recesses of various diameters are made.

The same as in example 1, only additionally blind holes are made on the upper surface of the liner with the removal of material (recesses), (see photo in Fig. 5), not in contact with blind cuts. The recesses can have different diameters and be located both coaxially with outer circular cuts of large diameter (that is, one inside the other simultaneously from both sides), and/or between blind cuts and/or along the insert perimeter.

This production of the liner allows you to further increase its flexibility by creating additional space for the surface to compress inward during the step. At the same time, an increase in the volume of voids makes it possible to further reduce the difference in weight between soles on a long and short leg.

In addition to them, through holes can also be made (see photo in Fig. 6), which enhance the above effect.

Example 4. Production of an insert with sealing inserts from a material of greater rigidity.

For people with a lot of weight, as well as to protect against sagging (loss of compensation height), when using a softer material, an insert is made in the same way as in example 3, only additionally, through holes with rounded edges are placed at the support points of the foot, into which sealing inserts are inserted from a material of greater rigidity. The resulting design of the liner (see photo in Fig. 7) will increase its strength and increase its service life while maintaining flexibility and slightly increasing the difference in weight compared to example 3.

As can be seen from the above examples, the addition of each of the proposed elements of changing the liner allows you to increase the effect obtained: due to blind cuts, the material stretches from the outside when the foot is bent during the step and at the same time allows you to maintain the density of the material and avoid heat loss; by additionally providing through holes and recesses, additional flexibility arises by creating space for the surface to compress inward during the step. All the voids also make it possible to reduce the difference in weight between the soles on the long and short legs.

Claims (7)

1. Orthopedic liner to compensate for the shortening of the lower limb, the length and width of which correspond to the length and width of the foot in the respective areas, and the height is determined by the shortening, characterized in that closed and rounded blind incisions of various diameters are made on its lower surface, not in contact with each other and with insert edges. 2. Orthopedic insert according to claim 1, characterized in that its heel zone is made integral. 3. Orthopedic liner according to claim 1, characterized in that between the blind incisions and / or along the perimeter of the liner there are through holes of various diameters. 4. Orthopedic liner according to claim 1, characterized in that recesses of various diameters are made on the upper surface of the liner, not in contact with blind incisions. 5. Orthopedic liner according to claim 4, characterized in that the recesses are located coaxially with the outer circular incisions, and/or between blind incisions, and/or along the perimeter of the liner. 6. Orthopedic insert according to claim 4, characterized in that, in addition to the recesses, through holes are made. 7. Orthopedic insert according to claim 4, characterized in that at the foot support points there are through holes with rounded edges, into which sealing inserts made of a material of greater rigidity are inserted.

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