Memory alloy rib prosthesis fixator

Abstract

The utility model relates to the field of medical instruments, in particular to a memory alloy rib prosthesis fixator. The two ends of the memory alloy rib prosthesis are respectively sleeved with a memory alloy rib fixator, each memory alloy rib fixator comprises a bone fracture plate body, a bone fracture plate cross beam, bone fracture plate embracing arms and bone fracture plate end teeth, the bone fracture plate body is composed of the bone fracture plate cross beam and the bone fracture plate embracing arms, the bone fracture plate cross beam is provided with a plurality of groups of bone fracture plate embracing arms, and the bone fracture plate end teeth are arranged on the bone fracture plate embracing arms. The multiple sets of bone fracture plate embracing arms are connected with the memory alloy rib prosthesis and an affected bone in an embracing mode respectively, bone fracture plate end teeth are arranged at the two ends of the bone fracture plate cross beam, the bone fracture plate end teeth at one end buckle the memory alloy rib prosthesis, and the bone fracture plate end teeth at the other end buckle the affected bone. After the memory alloy rib bone fracture plate is implanted into a human body, the memory alloy rib bone fracture plate continuously embraces and pressurizes at the body temperature, looseness caused by bone healing is avoided, and the phenomenon that human bones are hurt when a thread structure is implanted into or screwed into the bones can be avoided through the design without screw matching.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a memory alloy rib prosthesis fixator. Background Art

[0002] The ribs maintain the shape of the thorax, ensure the capacity of the thorax, provide the necessary conditions for the respiratory function of the lungs, and provide a good environment for the beating of the heart. The ribs also provide attachment points for muscles, such as the intercostal muscles and diaphragm. And the ribs follow the contraction or relaxation of the muscles, forming corresponding chest expansion or closing movements to provide space and power for breathing, increase lung capacity, and improve the smoothness of breathing.

[0003] Benign bone tumors include costochondromas and osteochondromas, and treatment requires only partial rib removal. Common chest wall malignant tumors include fibrosarcoma, chondrosarcoma, or malignant tumors that have metastasized to the ribs from other parts of the body. Single chest wall malignant tumors should be completely removed as long as there is no long-distance metastasis. For primary or metastatic tumors of the ribs, in addition to removing the ribs within 5 cm in front and behind the tumor, the intercostal muscles must also be removed; if the lungs have been affected, a partial lung resection should also be performed.

[0004] The prior art discloses a NiTi memory alloy embracing prosthetic rib, with patent number: 201620299683.X, which belongs to the field of medical orthopedic instruments. It includes a crossbeam, and the two ends of the crossbeam are provided with embracing arms, and the two ends of the crossbeam are provided with end teeth. The prosthetic rib of the utility model overcomes the shortcomings of traditional treatment, is simple to operate, firmly fixed, and greatly reduces the difficulty of surgery. The unique "memory" function forms continuous self-pressurization at normal human body temperature, provides good mechanical guarantee, can restore the integrity of the thorax, maintain the continuity of the ribs, enable the lung tissue to expand well, improve lung ventilation, and prevent chest wall softening and abnormal breathing; at the same time, it can stabilize the fracture ends and avoid the rib ends from damaging the chest organs again; it can also prevent the rib ends from angulating outward, reduce the incidence of rib neuralgia, effectively reduce the patient's chest pain, shorten the hospitalization time, and restore the labor force to the maximum extent. The NiTi memory alloy medical implant material has good biocompatibility and does not need to be removed after healing. However, the above-mentioned prior art has the following deficiencies: in surgery, an embracing metal plate or a locking metal plate is often used, and the plate is fixed to the broken rib by means of embracing claws or screws. During the process of fixing and installing the metal plate, the rib peeling surface is large, which affects bone healing and aggravates the patient's postoperative pain. The locking metal plate needs to be installed with screws during installation, which is complicated to operate and artificially damages the bone. In addition, since the rib bone is cancellous bone, it is easy for the screw to fall out, resulting in fixation failure. Therefore, the memory alloy embracing prosthetic ribs disclosed in the prior art cannot meet the needs of patients with rib-missing chest repair and treatment. Utility Model Content

[0005] The utility model solves the shortcomings of the existing technology and provides a memory alloy rib prosthesis fixator, which is suitable for rib missing chest repair surgery, specifically for human rib fracture missing or rib bone tumor resection chest repair surgery. The memory alloy rib prosthesis fixator effectively solves the problem of rib fracture missing or rib bone tumor resection chest repair.

[0006] The utility model provides the following technical solutions to solve the existing technical problems:

[0007] A memory alloy rib prosthesis fixator comprises a memory alloy rib prosthesis and a memory alloy rib fixator. The memory alloy rib fixator is respectively mounted on both ends of the memory alloy rib prosthesis. The memory alloy rib fixator comprises a bone plate body, a bone plate crossbeam, a bone plate embracing arm and a bone plate end tooth. The bone plate body is composed of a bone plate crossbeam and a bone plate embracing arm. The bone plate crossbeam is provided with a plurality of groups of bone plate embracing arms, which are respectively connected to the memory alloy rib prosthesis and the affected bone by embracing. The bone plate end teeth are arranged at both ends of the bone plate crossbeam. The bone plate end teeth at one end are buckled with the memory alloy rib prosthesis, and the bone plate end teeth at the other end are buckled with the affected bone. The two memory alloy rib bone plates are connected to the memory alloy rib prosthesis by using the memory embracing function. The final product provided is a memory alloy rib plate and a memory alloy rib prosthesis, which are provided separately. When using, select the product of appropriate specifications according to the size of the ribs, open the memory alloy rib plate in 0℃-5℃ sterile ice saline, fix the ribs at one end of the memory alloy rib plate, and fix the memory alloy rib prosthesis at the other end, and use sterile ice saline at about 37℃ to heat the memory alloy rib plate, so that the memory alloy rib plate is fixed and then pressurized. It makes the operation convenient during the implantation and operation process. This design allows the product to continuously embrace and pressurize the memory alloy rib plate at body temperature after being implanted in the human body to avoid loosening after bone healing. The design without screws can avoid the phenomenon that the threaded structure causes damage to the human bone when implanted or screwed into the bone.

[0008] The memory alloy rib prosthesis is divided into an arched support section and an embracing clamping section, and an embracing clamping section is arranged at the lower part of the arched support section to form a hollow structure.

[0009] The memory alloy rib prosthesis is in a strip-shaped structure.

[0010] The strip structure is straight or curved.

[0011] The arched support section of the memory alloy rib prosthesis is provided with reinforcing ribs and limiting reinforcing ribs, and two limiting reinforcing ribs are provided, and the two limiting reinforcing ribs are located on both sides of the reinforcing ribs.

[0012] The bone plate body is fitted with the arched support section and the reinforcing ribs, the bone plate embracing arms are embracing and clamped with the embracing clamping sections, and the bone plate end teeth are fitted with the limiting reinforcing ribs.

[0013] The utility model is composed of a memory alloy rib prosthesis and a memory alloy rib fixer, which utilizes the memory function to expand and close to achieve the purpose of fixation. A memory alloy rib prosthesis fixer is made of nickel-titanium shape memory alloy material as a whole. The unique memory function of the memory alloy is used to make the memory alloy rib prosthesis fixer have a unique continuous self-pressurization function. The continuous "holding force" provides good biomechanical conditions for the healing of the affected bone, and will not loosen due to bone healing and human movement. A memory alloy rib prosthesis fixer. The memory alloy rib prosthesis fixator adopts an embracing structure design. During implantation, no other instruments are required to assist in implantation. Man-made damaging operations such as drilling and wedging can be reduced to a minimum, avoiding man-made damage and avoiding electrochemical corrosion caused by implantation of different materials that affects the safety of implanted device fixation. The memory alloy rib fixator is opened with professional tools in sterile ice saline at 0°C-5°C, one end fixes the broken end of the rib, and the other end fixes the rib prosthesis. The memory alloy rib fixator is hot-compressed with sterile ice saline at about 37°C, so that its unfolded embracing arms embrace and fix the ribs and rib prosthesis. The embracing arms continuously apply a fixing force inward at human body temperature, thereby improving stability and safety after implantation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a side view of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the memory alloy rib prosthesis;

[0017] Figure 4 It is a side view of the memory alloy rib prosthesis;

[0018] Figure 5 It is a partial schematic diagram of the end teeth of the bone plate;

[0019] Figure 6 This is a schematic diagram of a straight memory alloy rib prosthesis;

[0020] Figure 7 This is the side view of the straight memory alloy rib prosthesis;

[0021] Figure 8 This is a schematic diagram of the end face of a straight memory alloy rib prosthesis;

[0022] Fig. 9 This is a schematic diagram of a curved memory alloy rib prosthesis;

[0023] Fig.10 This is the side view of the curved memory alloy rib prosthesis;

[0024] Fig.11 This is a schematic diagram of the end face of a curved memory alloy rib prosthesis.

[0025] Markings in the figure: memory alloy rib prosthesis 1, memory alloy rib fixator 2, arched support section 101, embracing clamping section 102, reinforcing rib 103, limiting reinforcing rib 104, bone plate body 21, bone plate cross beam 22, bone plate embracing arm 23, bone plate end teeth 24. DETAILED DESCRIPTION

[0026] A memory alloy rib prosthesis fixator comprises a memory alloy rib prosthesis 1 and a memory alloy rib fixator 2. The memory alloy rib fixator 2 is respectively mounted on both ends of the memory alloy rib prosthesis 1. The memory alloy rib fixator 2 comprises a bone plate body 21, a bone plate crossbeam 22, a bone plate embracing arm 23 and a bone plate end tooth 24. The bone plate body 21 is composed of the bone plate crossbeam 22 and the bone plate embracing arm 23. A plurality of groups of bone plate embracing arms 23 are arranged on the bone plate crossbeam 22. The plurality of groups of bone plate embracing arms 23 are respectively connected with the memory alloy rib prosthesis 1 and the affected bone in an embracing manner. Bone plate end teeth 24 are arranged at both ends of the bone plate crossbeam 22. The bone plate end teeth 24 at one end are snap-fitted with the memory alloy rib prosthesis 1, and the bone plate end teeth 24 at the other end are snap-fitted with the affected bone.

[0027] The memory alloy rib prosthesis 1 is divided into an arched support section 101 and an embracing clamping section 102. The lower part of the arched support section 101 is provided with an embracing clamping section 102 to form a hollow structure. The memory alloy rib prosthesis 1 is a strip-shaped structure. The strip-shaped structure is straight or curved. The arched support section 101 of the memory alloy rib prosthesis 1 is provided with a reinforcing rib 103 and a limiting reinforcing rib 104. There are two limiting reinforcing ribs 104, and the two limiting reinforcing ribs 104 are located on both sides of the reinforcing rib 103. The bone plate body 21 is fitted with the arched support section 101 and the reinforcing rib 103, the bone plate embracing arm 23 is embracing and clamping with the embracing clamping section 102, and the bone plate end teeth 24 are fitted with the limiting reinforcing rib 104.

[0028] By adopting the above technical solution, the cross beam 22 of the bone plate is symmetrically distributed. This symmetrical design makes the fixing force of the memory alloy rib bone plate balanced at human body temperature, strengthens the stability of the rib bone plate, and the cross beam resists the bone after being stressed to avoid fixation failure. The embracing arm designed with the memory alloy function is symmetrical on the left and right. When the embracing arm recovers, it can pressurize the left and right at the same time without causing damage to the bone during implantation. The center position of the asymmetric design of the embracing arm spacing is relatively large. This design is mainly that after the rib bone plate is implanted, the prosthesis end at the position of the fracture end is placed at the center position of the rib bone plate, and the large spacing avoids the compression of the fracture end after the embracing arm is stressed. The memory alloy nail rib prosthesis adopts a hollow design, and the prosthesis is designed to be straight and arc-shaped, and the arc curvature is consistent with the rib curvature. By adopting the above technical solution, the hollow design is to reduce the foreign body sensation of the human body after the prosthesis is implanted, and reduce the compression of the ribs after the prosthesis is implanted. There are two types of curvature designs, one is straight, which is plastically installed according to the position of the severed ribs of the human body during surgery. The straight design is plastically installed according to the rib position during surgery to better fit the shape and size of the human thorax. The other is arc-shaped, and its curvature is designed according to the curvature of the ribs. During installation, the appropriate specifications are selected according to the length and curvature requirements. The curved design can reduce the plasticity time during installation and reduce the length of the operation.

[0029] The product is easy to implant. Since the prosthesis is made of memory alloy, it has a memory function. There are two ways to implant it. Method 1: the memory alloy rib prosthesis is implanted according to the original shape. When implanted, the product is placed in the rib plate with the arms opened. After the arms of the rib plate are restored, pressurized and fixed. Method 2: the memory alloy rib prosthesis is placed in 0℃-5℃ sterile ice saline, the opening is meshed with professional tools, the product is placed in the rib plate with the arms opened. After the arms of the rib plate are restored, pressurized and fixed. The memory alloy rib prosthesis is designed with reinforcing ribs on the back of the main body.

[0030] By adopting the above technical solution, after the rib plate prosthesis is implanted, the reinforcing ribs can improve the strength of the product, meet the requirements of biomechanical force after implantation, and the protruding part of the reinforcing ribs can be continuously in contact with the rib plate under the condition of continuous self-pressurization after implantation, thereby increasing the contact point and preventing axial slippage. Plate end teeth 24 are provided at both ends of the memory alloy rib plate. By adopting the above technical solution, plate end teeth 24 are provided at both ends of the rib plate. After the product is implanted, the inverted teeth shrink downward at human body temperature, and the inverted teeth are close to the bone and the rib prosthesis, increasing the friction and enhancing the pull-out resistance, thereby preventing the product from loosening and falling out.

[0031] In summary, this application has the following technical effects.

[0032] 1. The memory alloy rib prosthesis fixator is made of nickel-titanium shape memory alloy material. The memory alloy rib bone plate and memory alloy rib prosthesis are designed separately and used together.

[0033] 2. The double-beam design of the memory alloy rib plate improves strength and stability. It has inverted teeth at both ends to increase friction after implantation and prevent dislocation.

[0034] 3. The memory alloy rib plate has 2-12 pairs of embracing arms. When in use, the memory function is utilized to open the embracing arms in sterile ice saline at 0℃-5℃. The memory alloy rib plate is hot-compressed with sterile ice saline at about 37℃ to achieve rapid fixation. The embracing arms are pressurized and fixed at human body temperature. After implantation, the pressurized fixation is continuously maintained at human body temperature. This design can greatly improve the convenience of surgery.

[0035] 4. The memory alloy rib prosthesis is designed to be hollowed out to reduce the foreign body sensation after implantation. Its cross-section design is similar to that of human ribs and is used in conjunction with rib bone plates to greatly improve the safety of the product and its stability after installation.

[0036] The memory alloy rib prosthesis is designed in a straight or curved shape, which is convenient for selection according to the patient in clinical use and better matches the patient's surgical plan.

[0037] 5. The memory alloy rib prosthesis is designed to be in an open state, which is convenient for implantation. Since the prosthesis is made of memory alloy, it has a memory function. There are two ways to implant it. Method 1: The memory alloy rib prosthesis is implanted in its original shape. When implanted, the product is placed in the rib plate with open arms. After the rib plate arms are restored, pressurized and fixed. Method 2: The memory alloy rib prosthesis is placed in 0℃-5℃ sterile ice saline, the opening is meshed with professional tools, and the product is placed in the rib plate with open arms. After the rib plate arms are restored, pressurized and fixed.

[0038] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The memory alloy rib prosthesis fixator adopts an embracing structure design. It does not require other instruments to assist in implantation. It can minimize damaging operations such as drilling and wedging to avoid human injuries. It is continuously pressurized and expanded at human body temperature to increase its pressurization effect and prevent dislocation. This design can also be used by patients with osteoporosis and can meet the mechanical requirements of fixation. The combination of the same materials can avoid electrochemical corrosion of different materials after implantation, which affects the safety of implant fixation.

[0039] Before the operation, a suitable memory alloy rib prosthesis fixator is selected according to the patient's bone size. During the operation, the three accessories of the memory alloy rib prosthesis fixator are placed in 0℃-5℃ sterile ice saline. After sufficient cooling, the memory alloy rib fixator and the plate embracing arms are unfolded in the ice saline until the opening is larger than the outer diameter of the affected bone. Then, the broken bone is incised and the tissue is peeled off to expose the affected bone, and the affected bone is restored. The size is measured using a rib length and arc measuring ruler according to the missing part. According to the measured size, a suitable straight or curved memory alloy rib prosthesis is selected, and one end of a memory rib plate with an open embracing arm is fixed to the end of the affected bone, and the other end is fixed to the memory alloy rib prosthesis. The fixing method of another memory rib plate with an open embracing arm is the same as the previous memory alloy rib plate. The memory alloy rib plate is hot-compressed with gauze soaked in sterilized hot saline to reset the embracing arm and firmly fix it at the bone end and the prosthesis. The installation is completed.

[0040] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A memory alloy rib prosthesis fixator, characterized in that The invention comprises a memory alloy rib prosthesis (1) and a memory alloy rib fixer (2). The memory alloy rib fixer (2) is respectively mounted on both ends of the memory alloy rib prosthesis (1). The memory alloy rib fixer (2) comprises a bone plate body (21), a bone plate crossbeam (22), a bone plate embracing arm (23) and a bone plate end tooth (24). The bone plate body (21) is composed of the bone plate crossbeam (22) and the bone plate embracing arm (23). A plurality of groups of bone plate embracing arms (23) are arranged on the bone plate crossbeam (22). The plurality of groups of bone plate embracing arms (23) are respectively embracingly connected to the memory alloy rib prosthesis (1) and the affected bone. Bone plate end teeth (24) are arranged on both ends of the bone plate crossbeam (22). The bone plate end teeth (24) at one end are buckled with the memory alloy rib prosthesis (1), and the bone plate end teeth (24) at the other end are buckled with the affected bone.

2. The memory alloy rib prosthesis fixator according to claim 1, characterized in that The memory alloy rib prosthesis (1) is divided into an arched support section (101) and an embracing clamping section (102); the lower part of the arched support section (101) is provided with an embracing clamping section (102) to form a hollow structure.

3. The memory alloy rib prosthesis fixator according to claim 1, characterized in that The memory alloy rib prosthesis (1) has a strip-shaped structure.

4. The memory alloy rib prosthesis fixator according to claim 3, characterized in that The strip structure is straight or curved.

5. The memory alloy rib prosthesis fixator according to claim 2, characterized in that The arched support section (101) of the memory alloy rib prosthesis (1) is provided with a reinforcing rib (103) and a limiting reinforcing rib (104), wherein two limiting reinforcing ribs (104) are provided, and the two limiting reinforcing ribs (104) are located on both sides of the reinforcing rib (103).

6. The memory alloy rib prosthesis fixator according to claim 5, characterized in that The bone plate body (21) fits with the arched support section (101) and the reinforcing rib (103), the bone plate embracing arm (23) is embracingly engaged with the embracing clamping section (102), and the bone plate end teeth (24) fit with the limiting reinforcing rib (104).

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