Mushroom-shaped femoral head support

Abstract

The utility model provides a mushroom-shaped femoral head support, relates to the technical field of medical instruments, and solves the technical problems that the existing femoral head support is connected through welding, the memory function of metal is easily influenced by the welding connection, the welding part is easy to fall off, the product is separated, and the appearance and the operation effect of an implanter are seriously influenced. The bone grafting device comprises a supporting piece used for supporting the femoral head in the necrotic area and a supporting pipe used for forming a bone grafting channel, the supporting piece and the supporting pipe are integrally formed into a pipe shape, and the supporting piece comprises a plurality of sets of arched beams used for opening the femoral head in the necrotic area and arc-shaped heads used for being connected with the arched beams. Due to the adoption of the integral structure, the material and the space are saved, the required bony channel is smaller, and the trauma to the femoral neck is reduced; the success rate of an operation is improved, complications are reduced, and the life quality of a patient is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a mushroom-shaped femoral head support. Background Art

[0002] Femoral head necrosis is a common and intractable disease that affects hip joint function, causing pain and difficulty walking. If not effectively treated, it may lead to joint dysfunction and disability. Traditional methods for treating femoral head necrosis include medication, physical therapy, drilling decompression, hip replacement, etc., but these methods have their limitations. For example, the effect of drug treatment is uncertain, hip replacement surgery is traumatic and expensive, and there are limitations on the lifespan of the prosthesis and possible complications. Early diagnosis and treatment of femoral head necrosis is crucial. Intervention before the femoral head collapses can delay disease progression and avoid or postpone hip replacement surgery.

[0003] To provide effective mechanical support, prevent femoral head collapse, and promote bone repair, researchers have developed various types of femoral head supports. These supports are typically made of materials with good biocompatibility and excellent mechanical properties, such as titanium alloys and porous tantalum. Designed to adapt to the anatomy of the femoral head, they provide stable support and allow for bone ingrowth.

[0004] For example, patent publication number CN210582612U proposes an expandable memory alloy femoral head support. The device features a simple design, is easily deformed for implantation, and features a fixed connection between the support and support tube, preventing the cannula and umbrella from falling off during implantation. However, due to limitations in processing technology, the support tube and support are welded together, which can easily affect the metal's memory function and cause welds to fall off, leading to product separation. This severely impacts the appearance of the implant and the surgical outcome, making it difficult to promote clinical use. Utility Model Content

[0005] The purpose of the utility model is to provide a mushroom-shaped femoral head support to solve the technical problem that the existing femoral head support is connected by welding, which easily affects the memory function of the metal, the welding joint is easy to fall off, causing the product to separate, and seriously affecting the appearance of the implant and the surgical effect.

[0006] The embodiments of the present invention are achieved through the following technical solutions:

[0007] A mushroom-shaped femoral head support device includes a support member for supporting the femoral head in the necrotic area and a support tube for forming a bone grafting channel. The support member and the support tube are integrally formed into a tubular shape. The support member includes several groups of arched beams for supporting the femoral head in the necrotic area and arc-shaped heads for connecting the arched beams.

[0008] Preferably, the arched beam includes an arched portion for supporting the femoral head and a connecting rod for supporting the arched portion and preventing the supporter from falling off.

[0009] Preferably, the connecting rod is perpendicular to the support tube and the arched portion.

[0010] Preferably, the support tube is further provided with a plurality of blood supply holes for assisting in reconstructing the blood supply of the femoral head.

[0011] Preferably, the blood supply holes are spaced apart in 6 groups.

[0012] Preferably, the support member and the support tube are integrally formed into a tubular member, and the tubular member is provided with a hollow groove and an arc-shaped head for separating the arched beams.

[0013] Preferably, the arched beams and hollow grooves are provided in 8 groups.

[0014] Preferably, the support is made of a memory alloy with plasticity and memory function, has a certain strength, and has superelastic characteristics to ensure sufficient supporting force, and is compatible with bone tissue without rejection, absorption, or toxic reactions.

[0015] Preferably, the support is fabricated from a tubular structure into a mushroom shape (the necrotic area is typically half-moon-shaped, and after the necrotic bone tissue is removed and the channel is added, it resembles a mushroom). This mushroom shape is the final state. At a certain temperature, the support softens and returns to its original tubular shape, facilitating entry into the femoral head through a very small channel. Temperature fluctuations then cause it to regain its memory, forming a strong, large, and adequately sized mushroom shape.

[0016] Optimally, the eight arched beams are fully extended, increasing the support area and reducing stress concentration, ensuring a healthy internal environment for new bone healing. After bone healing, a strong, reinforced concrete-like structure forms, preventing femoral head collapse. The six vascular holes in the tubular body also allow bone tissue inside and outside the lumen to heal together, strengthening the fusion of the support and bone tissue.

[0017] With this technical solution, the support member and the support tube are integrally formed into a tubular shape, which provides overall stability and structural strength, and helps to better support the femoral head in the necrotic area; the use of an integral structure saves material and space, and the required bony channel is smaller, with a diameter of only 8mm, which reduces trauma to the femoral neck. The arched beam is designed to prop up the femoral head in the necrotic area, providing the necessary mechanical support to prevent further collapse of the femoral head. The connecting rod is designed to be perpendicular to the support tube and the arched portion, which helps to fix the support and prevent it from moving or falling off inside the femoral head. The design of the blood supply hole helps to re-establish blood circulation in the femoral head and promote bone tissue repair and regeneration. The arc-shaped head connects the arched beam, which helps to disperse the force and reduce the pressure concentration on the femoral head, thereby reducing the risk of further damage.

[0018] The overall structure is beautiful in appearance, simple to make and easy to operate. The mushroom-shaped shape conforms to the shape of the necrotic area, reducing the need to scrape more normal bone, which means less bleeding and a reduced amount of bone grafting. The implantation time is shortened, the operation time and bleeding are reduced, and the practicality and promotion of the implant are greatly improved; due to the tubular design of the support, it is suitable for minimally invasive surgery, reducing surgical trauma and speeding up postoperative recovery. Hollow groove design: The hollow groove design is a processing process that only requires the processing of hollow grooves and arc-shaped portions on the tubular parts. The hollow grooves can be used to separate the arched beams and help reduce the weight of the support while maintaining sufficient structural strength. Through the above-mentioned design features, the support helps to improve the success rate of surgery, reduce complications, and improve the quality of life of patients.

[0019] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0020] 1. The utility model adopts an integral structure, which saves materials and space, requires a smaller bony channel, and reduces trauma to the femoral neck;

[0021] 2. The utility model has beautiful appearance, simple production and convenient operation. It conforms to the shape of the necrotic area, reduces the scraping of more normal bone, reduces bleeding and reduces the amount of bone grafting, shortens the implantation time, and reduces the operation time and bleeding;

[0022] 3. The utility model helps to improve the success rate of surgery, reduce complications and improve the quality of life of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the structure of a mushroom-shaped femoral head support in a contracted state provided by Example 1 of the present invention;

[0025] Figure 2 A schematic diagram of the structure of a mushroom-shaped femoral head support in an expanded state provided by Example 1 of the present invention;

[0026] Figure 3 A schematic diagram of a method for using a mushroom-shaped femoral head support provided in Example 1 of the present invention;

[0027] Icon: 1, support tube; 2, support; 21, arch beam; 22, arc head; 211, arch part; 212, connecting rod; 11, blood supply hole. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0030] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present application, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product of the application when it is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0032] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, if the terms "set", "mount", "connected", "connected" appear, they should be understood broadly, for example, they can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] Embodiment 1

[0034] A mushroom-shaped femoral head support device includes a support member 2 for supporting the femoral head in the necrotic area and a support tube 1 for forming a bone grafting channel. The support member 2 and the support tube 1 are integrally formed into a tubular shape. The support member 2 includes several groups of arched beams 21 for supporting the femoral head in the necrotic area and arc-shaped heads 22 for connecting the arched beams 21.

[0035] In this embodiment, the arched beam 21 includes an arched portion 211 for supporting the femoral head and a connecting rod 212 for supporting the arched portion 211 and preventing the supporter from falling off.

[0036] In this embodiment, the connecting rod 212 is perpendicular to the support tube 1 and the arched portion 211 .

[0037] In this embodiment, the support tube 1 is further provided with a plurality of blood supply holes 11 for assisting in reconstructing the blood supply of the femoral head.

[0038] In this embodiment, the blood supply holes 11 are arranged in 6 groups at intervals.

[0039] In this embodiment, the support member 2 and the support tube 1 are integrally formed into a tubular member, and the tubular member is provided with a hollow groove and an arc-shaped head 22 for separating the arched beams 21 .

[0040] In this embodiment, the number of the arched beams 21 and the hollow slots is 8.

[0041] In this embodiment, the support is made of a memory alloy with plasticity and memory function, has a certain strength, and has superelastic characteristics to ensure sufficient supporting force, and is compatible with bone tissue without rejection, absorption, or toxic reactions.

[0042] In this embodiment, the support is fabricated from a tubular structure into a mushroom shape (the necrotic area is typically half-moon-shaped, and after the necrotic bone tissue is removed and the channel is added, it resembles a mushroom). This mushroom shape represents the final state. At a certain temperature, the support softens and returns to its original tubular shape, facilitating entry through a very small channel into the femoral head. Temperature fluctuations then cause it to regain its memory, forming a strong, large, and sufficient mushroom shape.

[0043] In this embodiment, the eight arched beams 21 are fully expanded, increasing the support area and reducing stress concentration, ensuring a favorable internal environment for new bone healing. After bone healing, a strong tissue similar to reinforced concrete is formed, preventing the possibility of femoral head collapse. The six blood supply holes 11 in the tubular body also allow the bone tissue inside and outside the lumen to heal together, strengthening the fusion of the support device and bone tissue.

[0044] In this embodiment, a 1mm thick, 8mm diameter tubular material is used. Heat treatment and fusion technology are used to create an arc-shaped, closed top end. Eight arched beams 21, each 30mm long and 10mm wide, are evenly cut around the 5mm diameter top end. Excess material is removed, leaving a 10mm long cylindrical tubular body with six 2mm diameter holes evenly spaced around it. Through special processing, this forms a mushroom-shaped support.

[0045] Working principle and usage:

[0046] During the procedure, the patient lies supine under continuous epidural anesthesia. The affected hip is elevated. Under fluoroscopy, a 1.5mm thick Kirschner wire is passed through the femoral neck and into the center of the necrotic area of ​​the femoral head. Using a minimally invasive approach, a small 30mm incision is made. An 8mm diameter special trepanation drill is used to guide the Kirschner wire through the femoral neck and into the necrotic area of ​​the femoral head. Normal bone tissue within the trepanation is removed and reserved. The necrotic area is very hard, requiring a drill or burr to reach 2mm into the subchondral bone. The Kirschner wire is then removed, and the necrotic tissue adjacent to the channel is cleaned with a special reamer, curved spatula, or angled burr, creating a mushroom-like cavity. The appropriate stent is selected based on the volume of the necrotic area. Ideally, one that is 1-2mm larger than the necrotic area allows for continuous tension around the necrotic area, providing a strong support. The stent is introduced through a 6mm diameter metal bone graft tube. The stent is placed in a temperature-controlled saline solution and then pinched into a 40mm long, 8mm diameter tube. A bone graft is inserted through the bony channel into the necrotic area of ​​the femoral head. A specific temperature of physiological saline is then injected, causing the graft to expand and fill the entire necrotic area, forming a mushroom-like shape. The eight beams expand outward, providing strong support for the entire top. The downward expansion prevents the implant from falling out. This creates an internal environment conducive to bone healing within the head space. Spare bone tissue is removed and made into soybean-sized particles. These particles are then combined with artificial bone or bone-growth-promoting BMP tissue. The graft is then used to fill the necrotic area and the entire bone channel. The implanted bone tightly integrates with the surrounding normal bone tissue through the spaces between the eight beams, promoting early healing. The bone graft is then removed, the wound sutured, and the surgery is complete.

[0047] The support member 2 and the support tube 1 are integrally formed into a tubular shape, which provides overall stability and structural strength, and helps to better support the femoral head in the necrotic area; the use of an integral structure saves material and space, and the required bony channel is smaller, with a diameter of only 8mm, which reduces trauma to the femoral neck. The arched beam 21 is designed to prop up the femoral head in the necrotic area, providing the necessary mechanical support to prevent further collapse of the femoral head. The connecting rod 212 is designed to be perpendicular to the support tube 1 and the arched portion 211, which helps to fix the support and prevent it from moving or falling off inside the femoral head. The design of the blood supply hole 11 helps to re-establish blood circulation in the femoral head and promote bone tissue repair and regeneration. The arc head 22 connects the arched beam 21, which helps to disperse the force and reduce the pressure concentration on the femoral head, thereby reducing the risk of further damage.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A mushroom-shaped femoral head support, comprising a support member (2) for supporting a femoral head in a necrotic area and a support tube (1) for forming a bone graft channel, characterized in that: The support member (2) and the support tube (1) are integrally formed into a tubular shape, and the support member (2) comprises a plurality of groups of arched beams (21) for supporting the femoral head in the necrotic area and arc-shaped heads (22) for connecting the arched beams (21).

2. The mushroom-shaped femoral head support according to claim 1, characterized in that: The arched beam (21) comprises an arched portion (211) for supporting the femoral head and a connecting rod (212) for supporting the arched portion (211) and preventing the supporter from falling off.

3. The mushroom-shaped femoral head support according to claim 2, characterized in that: The connecting rod (212) is perpendicular to the supporting tube (1) and the arched portion (211).

4. The mushroom-shaped femoral head support according to any one of claims 1 to 3, characterized in that: The support tube (1) is also provided with a plurality of blood supply holes (11) for assisting in reconstructing the blood supply to the femoral head.

5. The mushroom-shaped femoral head support according to claim 4, characterized in that: The blood supply holes (11) are arranged in 6 groups at intervals.

6. The mushroom-shaped femoral head support according to any one of claims 1 to 3, characterized in that: The support member (2) and the support tube (1) are integrally formed into a tubular member, and the tubular member is provided with a hollow groove and an arc-shaped head (22) for separating the arched beams.

7. The mushroom-shaped femoral head support according to claim 6, characterized in that: The arched beams (21) and hollow grooves are provided in 8 groups.

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