Double fixing type absorbable binding belt

Abstract

The utility model discloses a double fixing type absorbable binding belt. The double fixing type absorbable binding belt comprises a belt head part, a belt tail part and a middle part, the belt head part is provided with a plurality of anti-skid spinous processes and through holes, the belt tail part is provided with a plurality of ratchets matched with the through holes, the middle part is provided with a fixing sleeve, and meshing teeth matched with the anti-skid spinous processes are arranged in the fixing sleeve. The absorbable binding belt has the fracture end braking and fixing effects, is easy to operate, can simplify the temporary fracture fixing process, can improve the binding stability and reliability, is good in biocompatibility and can be automatically degraded and absorbed along with fracture healing.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, relates to the field of fracture binding and fixation, and particularly relates to a double-fixed absorbable binding band. Background Art

[0002] For fracture surgical treatment, appropriate internal fixators need to be selected, otherwise it will affect fracture healing and postoperative rehabilitation. Binding internal fixation is a commonly used clinical fracture fixation method, which is mainly applicable to oblique fractures, spiral fractures, avulsion fractures, comminuted fractures, and fixation of smaller fracture fragments. Currently, the commonly used binding materials are metal ribbons such as steel wires. Steel wires have the advantages of being easily obtained and low in price. However, during the fixation process of steel wires, they cause certain cutting to the bones, which not only affects blood circulation, but also is prone to breakage and sliding, resulting in nonunion or delayed union of fractures. In addition, steel wires are also easily wrapped by newly formed callus and are extremely difficult to remove. Other metal materials represented by titanium cables often have problems such as high prices, which limit their clinical applications.

[0003] Natural silk thread is another binding material that is currently widely used in clinics. Silk thread has good biocompatibility, strength, elasticity, and toughness. When fixing fractures, it can effectively reduce the stress shielding of the internal fixation on the fracture ends, which is beneficial to fracture shaping and healing. However, the mechanical strength of silk thread is weak, and it is only applicable to fractures in non-weight-bearing parts or as an auxiliary material.

[0004] In order to solve the problem of removing the thread during the second operation, a new type of synthetic absorbable binding band has emerged. This type of binding band uses polyester and polyanhydride high molecular polymers including polylactic acid as the main materials, has good biocompatibility and mechanical properties, and can be gradually degraded into non-toxic substances such as carbon dioxide and water in the human body. It can reduce the pain and infection risk of patients without the need for a second operation to remove it, and is suitable for preparing fracture binding bands. However, the current high molecular absorbable binding band still has difficulty meeting the requirements of weight-bearing parts in terms of fixation strength.

[0005] To sum up, among the current fracture binding and fixation materials, metal silk threads have deficiencies such as stress shielding, being prone to breakage, being prone to sliding, damaging blood circulation, and being difficult to remove; natural silk threads have the defect of insufficient strength; the current degradable binding bands still cannot meet the clinical requirements in terms of mechanical fixation performance. It is necessary to develop an absorbable binding band with high biocompatibility, good mechanical strength, simple operation, and reliable fixation effect. Content of the Utility Model

[0006] The utility model aims at the above problems and provides a double-fixed absorbable binding band, which has the functions of braking and fixing the fracture ends, is simple to operate, can not only simplify the temporary fixation process of fractures, but also improve the stability and reliability of binding, and has good biocompatibility and can be degraded and absorbed by itself along with fracture healing.

[0007] To achieve the above object, the present utility model adopts the following technical solutions:

[0008] The double-fixed type absorbable tying band provided by the present utility model has the following technical features, including a band head, a band tail and a middle part; the band head is provided with a plurality of anti-slip spines and through holes, the band tail is provided with a plurality of spines adapted to the through holes, and the middle part is provided with a fixing sleeve, and the fixing sleeve is provided with engaging teeth adapted to the anti-slip spines.

[0009] When the tying band of the present utility model is in use, the spines and the through holes cooperate to perform preliminary fixation, and the fixing tightness is adjusted according to the intraoperative needs. After the position is determined, the band head is inserted into the fixing sleeve to form a one-way locking tooth, which plays a role in braking and fixing the fracture ends.

[0010] Preferably, in the double-fixed type absorbable tying band provided by the present utility model, the anti-slip spines, the spines and the fixing sleeve are all arranged on the back of the tying band, and the inner surface is smooth and contacts with the bone tissue.

[0011] Preferably, in the double-fixed type absorbable tying band provided by the present utility model, the tying band is made of a polylactic acid polymer material. This kind of material has good biocompatibility and mechanical properties, and can be gradually degraded into non-toxic substances such as carbon dioxide and water in the human body, and there is no need for a second operation to remove it, which can reduce the pain and infection risk of patients, and is suitable for preparing fracture tying bands.

[0012] Preferably, in the double-fixed type absorbable tying band provided by the present utility model, the number of spines is 3 to 5, and the number of through holes is 3 to 5 more than the number of spines, which not only improves the adaptability of tying different sizes of bones, but also enhances the adjustment flexibility.

[0013] Preferably, in the double-fixed type absorbable tying band provided by the present utility model, the shape of the spines is a bald mushroom-shaped spine, and the diameter of the mushroom-shaped structure on the top of the head is larger than the diameter of the through hole, preventing the spine structure from slipping out of the through hole; the angle formed after the spine and the through hole are combined is 160 to 175 °C.

[0014] Preferably, in the double-fixed type absorbable tying band provided by the present utility model, the number of engaging teeth in the fixing sleeve is 2 to 3, which enhances the meshing force between the spines and the engaging teeth.

[0015] Preferably, in the double-fixed type absorbable tying band provided by the present utility model, the shape of the band body of the tying band is wide and flat, and the width and thickness of the band head are slightly smaller than the width and thickness of the band tail. Specifically, the length of the tying band is 200 mm, the width is 5 mm, the thickness is 1.5 mm, the length of the fixing sleeve is 8 mm, the width is 5 mm, the height is 5 mm, the bottom column diameter of the spine is 5 mm, the maximum plane diameter of the mushroom top is 10 mm, and the minimum plane diameter is 5 mm.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] First of all, the smooth surface of the binding band of the present utility model comes into contact with soft tissues without causing damage. With a dual fixation system design, the ratchet teeth and through holes cooperate to perform preliminary fixation first, and the fixation tightness can be adjusted according to the intraoperative needs; after the position is determined, the head of the band is inserted into the fixing sleeve to form one-way locking teeth, which play a role in braking and fixing the fracture ends. It realizes the two-way adjustment of the length of the band body according to the fixed part, maximizes the utilization of the tightening force of the binding band, makes the force on the fracture fixation part balanced, and achieves stable fixation.

[0018] Secondly, the present utility model is made of absorbable materials and gradually degrades as the fracture heals, so that its stress is gradually transferred to the bone, effectively avoiding stress shielding, conforming to the biomechanical principle of bone healing, effectively promoting fracture healing, eliminating the need for secondary removal, reducing the risk of infection and surgical pain for patients, and reducing the treatment cost.

[0019] Thirdly, the binding band of the present utility model is easy to prepare and operate, does not require special instruments and specific conditions, and the ratchet teeth are easy to penetrate into the band body through holes and are not easy to slip out.

[0020] Fourthly, in terms of function, the present utility model effectively avoids the shortcomings of wire cutting, easy sliding, and metal corrosion caused by metal binding fixation, and also overcomes the defect of insufficient strength of the natural silk thread binding structure. At the same time, the design method of the dual fixation system greatly improves its binding tightening force, and also solves the problem that the fixation strength of the current polymer absorbable binding band is still difficult to meet the needs of load-bearing parts.

[0021] In summary, the present utility model simplifies the temporary fracture fixation process, has reliable binding, high mechanical strength, good biocompatibility, is easy to operate, degrades and is absorbed by itself as the fracture heals, and has the functions of braking and fixing the fracture ends. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the dual-fixed type absorbable binding band of the present utility model;

[0023] Figure 2 is Figure 1 the front view of;

[0024] Figure 3 is Figure 1 the left view in;

[0025] Figure 4 is Figure 1 the partial enlarged view of the ratchet teeth at the tail of the band in;

[0026] Figure 5 is the partial enlarged view of the cooperation between the spinous process and the meshing teeth of the fixing sleeve;

[0027] Figure 6 It is a schematic structural diagram when the double-fixed absorbable binding band is in use. Specific embodiments

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments 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 some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0029] According to Figures 1 to 6 , the double-fixed absorbable binding band 100 provided in this embodiment includes three parts: a band head, a band tail and a middle part; the band head is provided with a plurality of anti-slip spines 1 and through holes 2, the band tail part is provided with a plurality of spines 3 adapted to the through holes, and the middle part is provided with a fixing sleeve 4, and a meshing tooth 5 adapted to the anti-slip spines is arranged in the fixing sleeve.

[0030] To ensure that the binding band does not cause damage to bone tissue, the anti-slip spines 1, spines 3 and the fixing sleeve 4 are all arranged on the back of the binding band, and the inner surface is smooth and contacts with the bone tissue. At the same time, the binding band is made of a polylactic acid polymer material. This kind of material has good biocompatibility and mechanical properties, and can be gradually degraded into non-toxic substances such as carbon dioxide and water in the human body, and there is no need for a second operation to remove it, which can reduce the pain and infection risk of patients, and is suitable for preparing fracture binding bands.

[0031] The anti-slip spines 1 are adapted to the fixing sleeve 4, and the structural type is similar to that of a cable tie structure. The anti-slip spines 1 are in an inclined step shape, and the fixing sleeve 4 is a hollow cube structure, and 2 to 3 meshing teeth 5 adapted to the anti-slip spines are arranged inside, so as to enhance the meshing force between the spines and the meshing teeth.

[0032] The number of spines is 4, and the number of through holes is 3 to 5 more than that of the spines. In this embodiment, it is set to 8, which not only improves the adaptability of binding bones of different sizes, but also improves the adjustment flexibility. The shape of the spines is a bald mushroom-shaped spine, and the diameter of the mushroom-shaped structure on the top of the head is larger than the diameter of the through hole, so as to prevent the spine structure from slipping out of the through hole; the angle formed by the combination of the spine and the through hole is 160 to 175 °C.

[0033] The belt body of the binding belt is wide and flat, and the width and thickness of the belt head are slightly smaller than those of the belt tail. During preparation, the material is formed into a binding belt through an injection machine mold. The length of the binding belt is 200 mm, the width is 5 mm, and the thickness is 1.5 mm. The length of the engaging part 4 of the belt body is 8 mm, the width is 5 mm, and the height is 5 mm. The bottom column diameter of the positioning ratchet 6 is 5 mm, the maximum plane diameter of the mushroom top is 10 mm, and the minimum plane diameter is 5 mm.

[0034] When the binding belt of the present utility model is in use, the ratchet and the through hole cooperate to perform preliminary fixation, and the fixation tightness is adjusted according to the intraoperative needs. After the position is determined, the belt head is inserted into the fixing sleeve to form a one-way locking tooth, which plays a role in braking and fixing the fracture ends and strengthening the fixation. According to the degree and location of the fracture, one or more absorbable binding belts can be used.

[0035] The preferred embodiments of the present utility model have been specifically described above, but the present utility model is not limited to the described embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present utility model, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A double fixed absorbable binding belt, characterized in that: It includes three parts: a belt head, a belt tail and a middle part; the belt head is provided with a plurality of anti-slip spinous processes and through holes, the belt tail is provided with a plurality of ratchets adapted to the through holes, and the middle part is provided with a fixing sleeve, in which meshing teeth adapted to the anti-slip spinous processes are provided.

2. The double fixed absorbable binding belt according to claim 1, characterized in that: in, The anti-skid spinous process, ratchet teeth and fixing sleeve are all arranged on the back side of the binding belt, and the inner surface is smooth.

3. The double fixed absorbable binding belt according to claim 1, characterized in that: in, The binding belt is made of polylactic acid polymer material.

4. The double fixed absorbable binding belt according to claim 1, characterized in that: in, The number of the ratchet teeth is 3 to 5, and the number of the through holes is 3 to 5 more than the number of the ratchet teeth.

5. The double fixed absorbable binding belt according to claim 1, characterized in that: in, The shape of the ratchet is a bald mushroom-shaped ratchet, and the ratchet and the through hole form an angle of 160-175 degrees.

6. The double fixed absorbable binding belt according to claim 1, characterized in that: in, The number of the meshing teeth is 2 to 3.

7. The double fixed absorbable binding belt according to claim 5, characterized in that: in, The belt body of the binding belt is in a wide and flat shape, and the width and thickness of the belt head are slightly smaller than the width and thickness of the belt tail.

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