Flexible bone injury fixing device

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a flexible bone injury fixing device which comprises a connecting buckle and a locking thread, the connecting buckle is made of titanium, titanium alloy or medical polymer materials, and the locking thread is made of ultra-high molecular weight polyethylene fibers or absorptive fiber materials. The connecting buckle is of an integrally-formed boat anchor type structure, the boat anchor type structure is composed of an anchor handle and two wing barbs, the two wing barbs are symmetrically arranged on the left side wall and the right side wall of the anchor handle, a through hole is formed in the end, away from the two wing barbs, of the anchor handle, and the anchor handle is arranged on the lock catch line in a penetrating mode through the through hole and can freely move. The flexible bone injury fixing device provided by the scheme is composed of the connecting buckle and the lock catch line, is good in deformability, can be completely attached to the surface of injured bone tissue, is wide in application range, can be suitable for fixation of slight fractures and bone fractures of different parts of four limbs of a human body and chest ribs, and is simple in model selection compared with traditional complicated and various nail plate systems; and doctors can select conveniently.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a flexible bone injury fixation device. Background Technology

[0002] Bone injuries are common in the field of surgical medicine. When a fracture or crack occurs, appropriate treatment and fixation should be performed promptly. Existing injury repair methods mainly include plaster casts, metal wires, and various bone fixation plates, compression locking plates, metal locking screws, and other plate and screw systems, depending on the location of the injury.

[0003] While existing bone injury repair and fixation methods are effective in most bone injury surgeries, they each have their own shortcomings. For example, metal plates, metal screws, and cannulated screws all require drilling into the bone tissue during surgery, sometimes even applying pressure, causing significant damage to the bone, complicating the procedure, and requiring a second surgery to remove them after bone healing, prolonging wound healing time and increasing patient suffering. Metal ligation wires, while strong, are also rigid, making them very inflexible during surgery. The sharp wire tips repeatedly cause damage to muscles and other soft tissues, and a second surgery is usually required to remove them after bone healing, increasing the overall healing time and leaving multiple scars.

[0004] In summary, this solution proposes a flexible bone injury fixation device to address the existing problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of current bone injury repair products on the market, such as metal bone plates, bone screws, and metal binding wires, to solve the pain points of surgical operations for clinicians, and to reduce the problem of repeated harm to patients caused by secondary surgeries. Therefore, a flexible bone injury fixation device is proposed.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A flexible bone injury fixation device includes a connecting buckle and a locking wire. The connecting buckle is made of titanium, titanium alloy or medical polymer material, and the locking wire is made of ultra-high molecular weight polyethylene fiber or absorbent fiber material.

[0008] The connecting buckle is an integrally formed anchor-shaped structure, which consists of an anchor shank and two barbs. The two barbs are symmetrically arranged on the left and right side walls of the anchor shank. A through hole is opened at the end of the anchor shank away from the two barbs. The anchor shank passes through the through hole and is threaded onto the locking line and can move freely.

[0009] The two ends of the locking wire are locking wire A and locking wire B, respectively. Locking wire A forms a loop of fixed length by self-nesting and knotting. The loop is used to attach the locking wire to the connecting buckle.

[0010] The locking line has a nested center hole. The B end of the locking line passes through the through hole on the anchor handle and then emerges from the nested center hole on the locking line. The B end of the locking line can move freely within the nested center hole to adjust the size of the locking coil.

[0011] As a further description of the above technical solution: the diameter of the loop is 5-20 mm.

[0012] As a further description of the above technical solution: the medical polymer material is polyetheretherketone or polylactic acid.

[0013] As a further description of the above technical solution: the locking thread is a circular cross-section sewing thread, a flat strip sewing thread, or a round-flat thread with circular cross-sections at both ends and a flat strip structure in the middle, and the locking thread has a hole in the center.

[0014] As a further description of the above technical solution: the ends of the two barbs are arc structures with a radius of curvature of 1-5 mm.

[0015] As a further description of the above technical solution: the length of the anchor shank is 5-30 mm, the width is 2-10 mm, and the thickness is 1-5 mm.

[0016] As a further description of the above technical solution: the surface of the connecting buckle is coated with a bioactive coating, which is a hydroxyapatite coating.

[0017] As a further description of the above technical solution: the absorbent fiber material is silk fibroin fiber or PGA / PGLA fiber material.

[0018] Compared with existing technologies, the advantages of this utility model are:

[0019] I. The flexible bone injury fixation device provided in this solution consists of connecting buckles and locking lines. It has good deformability and can completely conform to the surface of the injured bone tissue. It has a wide range of applications and can be used for fixation of minor fractures and cracks in different parts of the limbs and ribs. Compared with the traditional complex and numerous types of nail and plate systems, the model selection is simple and convenient for doctors to choose.

[0020] Second, compared with rigid bone fixation devices such as metal plates, metal screws, and compression locking plates, the bone fixation device in this scheme is simple to operate on, does not require drilling, avoids secondary damage to bone tissue, and does not have the risk of osteolysis associated with screw-plate systems. It can be implanted for a long time without the need for a second surgery to remove it, which has significant advantages.

[0021] Third, the bone fixation device and flexible bone injury fixation band in this scheme are flexible fixation devices, which have a small rejection reaction in the human body, are easily wrapped or absorbed by soft tissue growth, are not easy to loosen, have high safety, and have little or no imaging. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the connecting buckle of this utility model;

[0024] Figure 3 A schematic diagram showing the state of the injured bone before the flexible bone injury fixation device of this utility model is fixed.

[0025] Figure 4 A schematic diagram showing the state of the flexible bone injury fixation device of this utility model when fixing the injured bone;

[0026] Figure 5 A schematic diagram showing the state of the injured bone after fixation by the flexible bone injury fixation device of this utility model;

[0027] Figure 6 This is one of the structural schematic diagrams of the locking thread of this utility model, which is a circular cross-section sewing thread;

[0028] Figure 7 This is the second structural schematic diagram of the locking thread of this utility model, which is a circular cross-section sewing thread.

[0029] Figure 8 This is one of the structural schematic diagrams of the locking thread of this utility model, which is a flat strip-shaped sewing thread;

[0030] Figure 9 This is the second structural schematic diagram of the locking thread of this utility model, which is a flat ribbon-shaped sewing thread;

[0031] Figure 10 This is one of the structural diagrams of the locking thread of this utility model, which is a sewing thread with round ends and a flat strip structure in the middle;

[0032] Figure 11 This is the second schematic diagram of the structure of the locking thread of this utility model, which is a stitch with round ends and a flat strip structure in the middle.

[0033] Explanation of the labels in the diagram:

[0034] 1. Connecting buckle; 11. Anchor handle; 12. Two-wing barbs; 13. Through hole;

[0035] 2. Locking wire; 21. Locking wire A end; 211. Wire loop; 22. Locking wire B end; 23. Nested center hole. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0037] Please see Figure 1 A flexible bone injury fixation device includes a connecting buckle 1 and a locking wire 2. The connecting buckle 1 is made of titanium, titanium alloy, or medical-grade polymer material, but is not limited to these materials. Titanium and titanium alloy have good biocompatibility. Under physiological conditions, titanium forms a thin and stable oxide film on its surface, which prevents further corrosion and facilitates good bonding with human tissue. The medical-grade polymer material can be polyetheretherketone (PEEK) or polylactic acid (PLA). PEEK also has excellent biocompatibility. It does not cause a significant immune response in vivo, and its interface with human tissue is relatively stable. PLA also has good biocompatibility, and its absorbable properties are a significant advantage in some cases, such as for small bone injuries or pediatric patients. As the bone tissue heals, PLA gradually degrades and is absorbed, avoiding the risk of secondary surgery for removal.

[0038] The locking thread 2 is made of ultra-high molecular weight polyethylene fiber or absorbable fiber material, but is not limited to these two. Ultra-high molecular weight polyethylene fiber is characterized by high strength, low weight, and smoothness. In bone injury fixation, when soft tissue or periosteum needs to be sutured and fixed, it can provide sufficient tensile strength to ensure a tight seal at the suture site. The absorbable fiber material is made of silk fibroin fiber or PGA / PGLA fiber material, which has many advantages such as renewability, high mechanical strength, good biocompatibility, and controllable degradation and absorption by the human body. It can be used in conjunction with the polylactic acid connecting clip 1 to achieve a fully absorbable internal fixation solution.

[0039] like Figure 2 As shown, the connecting buckle 1 is an integrally formed anchor-shaped structure. The anchor-shaped structure consists of an anchor shank 11 and two barbs 12. The two barbs 12 are symmetrically arranged on the left and right side walls of the anchor shank 11. A through hole 13 is provided at the end of the anchor shank 11 away from the two barbs 12. The anchor shank 11 passes through the through hole 13 and is threaded onto the locking line 2 and can move freely.

[0040] The two ends of the locking wire 2 are locking wire A end 21 and locking wire B end 22, respectively. Locking wire A end 21 forms a fixed length loop 211 by self-nesting and knotting. The loop 211 has a diameter of 5-20 mm and is used to attach the locking wire 2 to the connecting buckle 1.

[0041] like Figure 1 As shown, the locking wire 2 is provided with a nested center hole 23. The locking wire B end 22 passes through the through hole 13 on the anchor handle 11 and then exits through the nested center hole 23 on the locking wire 2. The locking wire B end 22 can move freely within the nested center hole 23 to adjust the size of the locking coil.

[0042] The surgical procedure for this flexible bone injury fixation device is as follows:

[0043] The first step is to make an incision in the wound, and then, using an orthopedic suture hook, loop the locking suture A end 21 and locking suture B end 22 around the injured bone and pass them through. Figure 3 As shown;

[0044] The second step is to hang the loop 211 of the locking wire A end 21 on the two wings of the connecting buckle 1, as follows. Figure 4 As shown;

[0045] Third step, pull the locking wire B end 22, gradually shrink the locking wire coil until the locking wire 2 and the connecting buckle 1 are both tightly attached to the bone surface;

[0046] Fourth step, tighten end B 22 of the locking wire to lock the damaged bone and tie a knot to fix it;

[0047] Step 5: Cut off the excess suture at end B22 of the lockstrap thread, then secure the next loop of lockstrap thread 2. After all the sutures are secured, suture the wound. The surgery is now complete. (See attached image) Figure 5 As shown.

[0048] This surgical fixation method can significantly reduce the patient's foreign body sensation, and it is not visible on X-ray examination, making it easy for doctors to observe. It uses medical-grade polymer materials and titanium alloy materials, and can be implanted for a long time without the need for a second surgery to remove it, thus avoiding patient suffering.

[0049] Furthermore, such as Figure 6-11 As shown, the locking thread 2 is a circular cross-section sewing thread, a flat strip sewing thread, or a round-flat thread with circular cross-sections at both ends and a flat strip structure in the middle. The locking thread 2 has a hole in the center.

[0050] The ends of the two barbs 12 are rounded to reduce damage to bone tissue, with a radius of curvature of 1-5 mm. The anchor shank 11 is 5-30 mm long, 2-10 mm wide, and 1-5 mm thick. Additionally, the surface of the connector 1 is coated with a bioactive coating, which is a hydroxyapatite coating, to promote the bonding between bone tissue and the connector 1.

[0051] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A flexible bone fracture fixation device, characterized by: The application relates to a connecting buckle (1) and a locking line (2), wherein the connecting buckle (1) is made of titanium, titanium alloy or medical polymer material, and the locking line (2) is made of ultra-high molecular weight polyethylene fiber or absorbable fiber material. The connecting buckle (1) is an integrally-formed boat anchor type structure, which comprises a shank (11) and two wing barbs (12) symmetrically arranged on the left and right side walls of the shank (11), and a through hole (13) is formed in the end of the shank (11) far away from the two wing barbs (12); the shank (11) is arranged on the locking line (2) through the through hole (13) and can freely move; The two ends of the locking line (2) are a locking line A end (21) and a locking line B end (22), the locking line A end (21) is knotted to form a fixed-length line ring (211) through self-nesting, and the line ring (211) is used for hanging the locking line (2) on the connecting buckle (1); The locking line (2) is provided with a nesting center hole (23), the locking line B end (22) is knotted to pass through the through hole (13) on the shank (11) and then knotted to pass out of the nesting center hole (23) on the locking line (2), and the locking line B end (22) can freely move in the nesting center hole (23) to adjust the size of the locking line loop.

2. A flexible bone fracture fixation device according to claim 1, wherein: The diameter of the line ring (211) is 5-20 mm.

3. The flexible bone fracture fixation device of claim 1, wherein: The medical polymer material is polyether ether ketone or polylactic acid.

4. The flexible bone fracture fixation device of claim 1, wherein: The locking line (2) is a circular cross-section suture, a flat band form suture or a round flat line with a circular cross-section at two ends and a flat band structure in the middle, and the locking line (2) is provided with a hole in the center.

5. The flexible bone fracture fixation device of claim 1, wherein: The end of the two wing barbs (12) is a circular arc structure, and the curvature radius of the circular arc structure is 1-5 mm.

6. The flexible bone fracture fixation device of claim 1, wherein: The length of the shank (11) is 5-30 mm, the width is 2-10 mm, and the thickness is 1-5 mm.

7. The flexible bone fracture fixation device of claim 1, wherein: The surface of the connecting buckle (1) is coated with a bioactive coating, and the bioactive coating is a hydroxyapatite coating.

8. The flexible bone fracture fixation device of claim 1, wherein: The absorbable fiber material is silk fibroin fiber or PGA / PGLA fiber material.

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