Fixing device for bone surgery
The orthopedic fixation device made of thermoplastic material solves the problems of low strength, poor breathability and complicated operation of existing materials, and achieves the effects of close fit, good breathability, simple operation and suitability for emergency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-03-31
AI Technical Summary
Existing orthopedic fixation materials have drawbacks such as low strength, poor breathability, complex operation, high price, and inability to be reshaped, making it difficult to meet the needs of emergency care.
This orthopedic fixation device, made of thermoplastic material, softens when heated, is cut and fitted to the shape of the affected area, and sets after cooling. It features a perforated structure to improve breathability and can be fixed to the affected area or wrapped around the body. It is simple and efficient to use.
It achieves a close fit to the affected area, has good breathability, is easy to operate, is suitable for various sites, meets emergency needs, has a low cost, and can be reshaped.
Smart Images
Figure CN224056166U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a fixation device for orthopedic surgery. Background Technology
[0002] Orthopedic splints are commonly used in fracture fixation, orthopedic surgical rehabilitation, and sports injury treatment. They are suitable for the limbs, wrists, elbows, and ankles.
[0003] Currently, fixation materials used in orthopedic surgery are gradually being replaced by polyurethane, polyester polymers, and 3D-printed materials, replacing the familiar plaster casts. Clinically, polymer bandages are cumbersome and dangerous due to the need for postoperative disassembly with a special electric saw; polymer splints have poor breathability, easily causing allergic reactions and requiring frequent replacement; low-temperature thermoforming plates require stretching and compression, which can easily cause displacement of the affected area; modular molded braces are only suitable for large areas, are stiff and uncomfortable, have many specifications, are expensive, and are complex to operate. All of the above products have disadvantages such as low strength, poor breathability, poor fit, long operation time, and inability to be reshaped. While 3D-printed materials offer high fit, they are expensive, have high equipment costs, cannot be reshaped, and have a printing cycle of at least 3-4 days, which cannot meet the clinical needs of emergency cases. In some fracture patients, callus formation has already begun before fixation, presenting numerous defects in their use. Utility Model Content
[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a fixation device for orthopedic surgery that can be reshaped according to the actual shape of the affected area, has a simple installation and disassembly method, and good breathability.
[0005] A fixation device for orthopedic surgery according to an embodiment of the present invention includes a body made of thermoplastic material. The body is plate-shaped or mesh-shaped and has a hollow structure for ventilation.
[0006] It has at least the following beneficial effects:
[0007] Because the main body is made of thermoplastic material, it softens when heated, allowing it to be cut and shaped according to the shape of the affected area. The heated body can then be directly applied to the affected area. After cooling, the body will set, achieving a close fit between the body and the affected area. The body can be fixed or wrapped around the body to secure it to the affected area, thus fixing and holding it in place. This allows the body to be fixed to limbs, fingers, and the bridge of the nose, etc. It is simple to use, easy to operate, and highly efficient.
[0008] According to some embodiments of this utility model, the body is plate-shaped, and the hollow structure consists of multiple through holes.
[0009] According to some embodiments of this utility model, the front and rear ends of the main body are respectively a fixing part and a wrapping part. The left and right ends of the fixing part are provided with folded edges, and creases are formed between the left and right ends of the fixing part and the folded edges. The creases are parallel to the front and rear direction so that both folded edges can be bent and overlapped on the fixing part to form a reinforcing structure. The reinforcing structure is used to contact the skin of non-affected areas, and the wrapping part is used to wrap the affected area.
[0010] According to some embodiments of the present invention, the width of the fixing part and the two folded edges in the left-right direction is equal to the width of the wrapping part in the left-right direction.
[0011] According to some embodiments of the present invention, the cross-section of the body is an isosceles trapezoid.
[0012] According to some embodiments of the present invention, the main body is provided with a first cutting line, which is parallel to the bottom edge of the main body.
[0013] According to some embodiments of the present invention, the main body is provided with a second cutting line, the main body and the second cutting line have the same axis of symmetry, the second cutting line includes a first segment, a second segment and a third segment connected in sequence, the second segment is parallel to the bottom edge of the main body, the first segment and the third segment are respectively parallel to the two left and right distributed waist edges of the main body, the end of the first segment away from the second segment intersects the top edge of the main body, and the end of the third segment away from the second segment intersects the top edge of the main body.
[0014] According to some embodiments of the present invention, the main body is provided with a third cutting line, the shape of the third cutting line is the same as the shape of the second cutting line, and the third cutting line surrounds the second cutting line.
[0015] According to some embodiments of this utility model, the body is manufactured by a spinneret process.
[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0018] Figure 1 A schematic diagram of a surgical fixation device for the fingers;
[0019] Figure 2 A schematic diagram of a fixation device for surgical use in mesh bone surgery;
[0020] Figure 3 A schematic diagram of a surgical fixation device for the bridge of the nose;
[0021] Icon labels:
[0022] Body 100, fixing part 110, wrapping part 120, through hole 200, folded edge 300, crease 400, first cutting crease 500, second cutting crease 600, third cutting crease 700. Detailed Implementation
[0023] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.
[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0027] Reference Figure 1 and Figure 2 This utility model discloses a fixation device for orthopedic surgery, including a body 100 made of thermoplastic material. The body 100 is plate-shaped or mesh-shaped and has a hollow structure for ventilation.
[0028] Because the body 100 is made of thermoplastic material, it softens when heated, allowing it to be cut and shaped according to the shape of the affected area. The heated body 100 can then be directly applied to the affected area. After cooling, the body 100 will solidify, achieving a close fit between the body 100 and the affected area. The body 100 can be fixed or wrapped around the body to secure it to the affected area, thus fixing and holding it in place. This allows the body 100 to be fixed to limbs, fingers, and the bridge of the nose, etc. The method of use is simple, convenient, and efficient.
[0029] Understandably, the body 100, i.e., the orthopedic fixation device, can be heated with hot water to soften it. The water temperature is controlled at 55℃-65℃, and the heating time is 15s-45s. The hardening temperature of the body 100 is 10℃-30℃, and the hardening time is 1 min-5 min.
[0030] The perforated structure allows for ventilation, improving airflow to the affected area, facilitating heat dissipation, and enhancing comfort. The main body 100 is water-resistant, allowing patients to shower while wearing the orthopedic fixation device. The main body 100 can be cleaned by washing, and the orthopedic fixation device can be disinfected, enabling its reuse.
[0031] The thermoplastic material can be FORMcard. This embodiment also discloses a thermoplastic material comprising polycaprolactone, aluminum powder, hollow glass beads, and gypsum powder. The polycaprolactone, aluminum powder, hollow glass beads, and gypsum powder are mixed and poured into a dyeing mixer for constant-temperature hot melting at a temperature of 160℃-190℃. The mixture is stirred evenly, resulting in a plastic with improved shrinkage, hardness, strength, toughness, thermal conductivity, and cold conductivity. The mixture is then fed into a granulator for granulation, completing the modification. The modified and dried granules are fed into a screw plastic extruder at a temperature of 170℃-210℃ to soften the granules, obtaining a softened material. This softened material is conveyed to the discharge port via a screw conveyor mechanism, allowing it to be extruded from the die in a mesh-like form. The diameter of the extruded filaments is 0.6 mm-1.3 mm, the extrusion mesh length is 1200 mm, the width is 400 mm-520 mm, and the thickness is... The mesh is 4.5mm-7.5mm thick, with a cavitation degree of 0.45g / cm³-0.52g / cm³. After being cooled and dried in a cooling water tank, the mesh is cut to obtain the desired finished product. The finished product has the advantages of being DIY-shaped, having good air permeability, high strength, being skin-friendly, having good thermal conductivity, being able to pass through X-ray imaging, having strong plasticity, and a wide temperature range.
[0032] The component ratios (by weight) of polycaprolactone, aluminum powder, hollow glass beads, and gypsum powder are shown in the table below:
[0033]
[0034] The mesh structure, also known as a three-dimensional stacked cross-linked mesh structure, possesses four key characteristics: high strength, breathability, excellent fit, and lightweight. The resulting thermoplastic material has a thermal conductivity four times that of traditional products. After the orthopedic fixation device is applied to the affected area, cold compresses and anti-swelling and analgesic treatments can be performed through it. The orthopedic fixation device combines the toughness of resin with the rigidity of metal, boasting twice the strength of similar products (up to 100N), excellent mechanical properties, and high safety and reliability. After being softened in warm water at 56℃-64℃, the orthopedic fixation device can be shaped arbitrarily and can be customized to fit specific patient conditions.
[0035] Specifically, 8.5 parts of polycaprolactone, 1.0 part of aluminum powder, 0.5 parts of hollow glass beads, and 0.25 parts of gypsum powder are mixed together, poured into a dyeing mixer, and heated to a constant temperature until the raw materials are hot-melted. The constant temperature melting temperature is 180℃, and the hot-melting time is 5 minutes. The mixture is stirred evenly; then it is fed into a granulator for strip granulation to modify the material. After drying, modified granules are obtained. The granules are poured into a screw plastic extruder, and the temperature of the screw plastic extruder is set at 170℃ to soften the granules and obtain a softened material. The softened material is conveyed to the discharge port by the rotating screw, and extruded from a special mold to form a multi-layered stacked mesh hollow structure body 100 or a plate-shaped body 100, with a width of 520mm, a wire diameter of 1.0mm, a thickness of 6.0±0.2mm, and a cavitation rate of 0.52g / cm3. After cooling in a cooling water tank (water temperature: 22℃, cooling time 4min), and drying, it is cut again to form a malleable composite material product, which is also a fixation device for orthopedic surgery.
[0036] Typically, closed fractures are accompanied by some degree of edema. After the edema subsides, the fit of ordinary splints decreases, and the fixation effect is not as expected. However, orthopedic surgical fixation devices can be softened and reshaped, a feature unmatched by any other existing product. These devices offer exceptional fit, comparable to 3D-printed molds, overcoming the time-consuming and unusable drawbacks of 3D modeling and printing. They are highly efficient and convenient, allowing for fixation of the affected area in approximately 5 minutes. With just warm water and scissors, they can be used in most situations, making them particularly suitable for emergency situations and sports injuries. Orthopedic surgical fixation devices are non-toxic, non-irritating, and highly comfortable; bathing is permitted during rehabilitation without deformation.
[0037] In some embodiments, the body 100 is plate-shaped with a perforated structure consisting of multiple through holes 200. The through holes 200 have a breathable function, and the plate-shaped body 100 provides good wrapping and protection.
[0038] Reference Figure 1 In some embodiments, the front and rear ends of the body 100 are respectively a fixing part 110 and a wrapping part 120. The left and right ends of the fixing part 110 are provided with folded edges 300. Creases 400 are formed between the left and right ends of the fixing part 110 and the folded edges 300. The creases 400 are parallel to the front and rear direction so that both folded edges 300 can be bent and overlapped on the fixing part 110 to form a reinforcing structure. The reinforcing structure is used to contact the skin of non-affected areas. The wrapping part 120 is used to wrap the affected area, so that the orthopedic fixation device is suitable for the index finger.
[0039] When in use, the reinforcing structure is placed against the palm, and the wrapping part 120 is included on the index finger to achieve fixation of the orthopedic fixation device, which fixes the finger and the main body of the palm relative to each other.
[0040] Reference Figure 1 In some embodiments, the width of the fixing part 110 and the two folded edges 300 in the left-right direction is equal to the width of the wrapping part 120 in the left-right direction. The fixing part 110 can be first processed into a rectangle, and then notches are cut out on both the left and right sides of the fixing part 110, with the length direction of the notches being the left-right direction. Then, the left and right sides of the front end of the body 100 are folded towards the middle of the body 100, so that the two folded edges 300 are separated from the wrapping part 120. The processing method is simple.
[0041] Reference Figure 3 In some embodiments, the cross-section of the body 100 is an isosceles trapezoid, making the orthopedic fixation device suitable for the bridge of the nose.
[0042] The front end of the main body 100 is the upper bottom edge, the rear end of the main body 100 is the lower bottom edge, and the left and right ends of the main body 100 are the waist edges.
[0043] In some embodiments, the body 100 is provided with a first cutting notch 500, which is parallel to the bottom edge of the body 100. By cutting the body 100 at the position of the first cutting notch 500, the length of the body 100 can be changed, so that the body 100 can be applied to a shorter nasal bridge, and the orthopedic fixation device can be applied to a wider range of nasal bridge lengths, that is, it can be applied to patients with different nasal bridge lengths.
[0044] Reference Figure 3In some embodiments, the body 100 is provided with a second cutting crease 600. The body 100 and the second cutting crease 600 have the same axis of symmetry. The second cutting crease 600 includes a first segment, a second segment and a third segment connected in sequence. The second segment is parallel to the bottom edge of the body 100. The first segment and the third segment are parallel to the two left and right distributed waist edges of the body 100, respectively. The end of the first segment away from the second segment intersects the top edge of the body 100. The end of the third segment away from the second segment intersects the top edge of the body 100.
[0045] By cutting the body 100 at the second cutting mark 600, the width of the body 100 can be changed, making the body 100 suitable for narrower nasal bridge areas. This allows the orthopedic fixation device to be used for nasal bridges of a wider range of widths, making it suitable for patients with different nasal bridge widths.
[0046] Reference Figure 3 In some embodiments, the body 100 is provided with a third cutting crease 700, the shape of the third cutting crease 700 is the same as the shape of the second cutting crease 600, and the third cutting crease 700 surrounds the second cutting crease 600.
[0047] By cutting the body 100 at the second cutting mark 600, the width of the body 100 can be changed, making the body 100 suitable for nasal bridge lesions of medium width. This allows the orthopedic fixation device to be used for nasal bridges of more widths, that is, for patients with different nasal bridge widths.
[0048] In some of these embodiments, the body 100 is made by a spinneret process, which requires less raw material, is lighter, has lower cost, and is more breathable.
[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0050] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A fixation device for orthopedic surgery, characterized in that, The utility model relates to a kind of medical dressings, including: A body (100) is made of thermoplastic material, the body (100) is plate-like or net-like, the body (100) is provided with a hollow structure, and the hollow structure is used to ventilate.
2. A bone fixation device for use in orthopedic surgery according to claim 1, wherein: The body (100) is plate-like, and the hollow structure is a plurality of through holes (200).
3. A bone fixation device for use in orthopedic surgery according to claim 2, wherein: The front and rear ends of the body (100) are a fixed part (110) and a wrapping part (120) respectively, the left and right ends of the fixed part (110) are provided with a hem (300), and the left and right ends of the fixed part (110) and the hem (300) are both formed with a crease (400), the crease (400) is parallel to the front and rear directions, so that the two hems (300) can be bent and folded on the fixed part (110) to form a reinforcing structure, the reinforcing structure is used to contact the skin of non-affected area, and the wrapping part (120) is used to wrap the affected area.
4. A bone fixation device for use in orthopedic surgery according to claim 3, wherein: The width of the fixed part (110) and the two hems (300) in the left and right directions is equal to the width of the wrapping part (120) in the left and right directions.
5. A bone fixation device for use in orthopedic surgery according to claim 2, wherein: The cross section of the body (100) is isosceles trapezoidal.
6. A bone fixation device for use in orthopedic surgery according to claim 5, wherein: The body (100) is provided with a first cutting mark (500), and the first cutting mark (500) is parallel to the lower base edge of the body (100).
7. A bone fixation device for use in orthopedic surgery according to claim 5, wherein: The body (100) is provided with a second cutting mark (600), the body (100) and the second cutting mark (600) have a same symmetry axis, the second cutting mark (600) includes a first segment, a second segment and a third segment connected in sequence, the second segment is parallel to the lower base edge of the body (100), the first segment and the third segment are respectively parallel to the two left and right distributed base edges of the body (100), one end of the first segment away from the second segment intersects with the upper base edge of the body (100), and one end of the third segment away from the second segment intersects with the upper base edge of the body (100).
8. A bone fixation device for use in orthopedic surgery according to claim 7, wherein: The body (100) is provided with a third cutting mark (700), the shape of the third cutting mark (700) is same as the shape of the second cutting mark (600), and the third cutting mark (700) is in the shape of surrounding the second cutting mark (600).
9. A bone fixation device according to claim 1, wherein: The body (100) is made by spinning process.