A spinal broken rod repair device

Abstract

The present invention relates to the field of medical devices, and particularly to a spinal rod fracture repair device. The spinal rod fracture repair device includes a first nail-rod connecting part and a second nail-rod connecting part that are respectively matched with adjacent screws. The first nail-rod connecting part includes a first nail-rod accommodating cavity, and the second nail-rod connecting part includes a second nail-rod accommodating cavity. It further includes a first fastener and a second fastener that are respectively matched with the first nail-rod connecting part and the second nail-rod connecting part. The first nail-rod connecting part and the second nail-rod connecting part are connected through a connecting rod accommodating part. The connecting rod accommodating part includes a connecting rod accommodating groove for accommodating a connecting rod, and further includes a third fastener that is matched with the connecting rod accommodating part. Through the spinal rod fracture repair device provided by the present invention, effective repair and fixation of the fractured part of the spinal connecting rod can be minimally invasively completed only by local exposure without removing the original fixing device.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a device for repairing a broken connecting rod of a spinal screw. Background Art

[0002] As common and frequently-occurring diseases in orthopedics, scoliosis, spinal fractures, and spinal degenerative diseases (such as lumbar disc herniation, lumbar spinal stenosis, lumbar spondylolisthesis, degenerative scoliosis, etc.) not only affect the appearance of patients, but more severely can cause disability to the patients, reducing the quality of life of patients while imposing a great economic burden on families and society. For severe congenital scoliosis, idiopathic scoliosis, traumatic fractures, spinal degeneration and other related diseases, surgery is an important treatment method.

[0003] Among them, the pedicle screw-rod fixation technique is the most widely used and most effective spinal surgery technique. However, due to the change of stress after surgery, the fracture of the connecting rod often occurs (especially common in long-segment fixation), and corresponding clinical symptoms are produced. In this case, reoperation is often required. The reoperation requires exposing the entire original surgical segment and removing the nuts to replace the new connecting rod, or removing the entire original screw-rod device and reinserting new screws and using a connecting rod to connect and fix. This requires not only preparing a removal tool matching the original fixation device, but also the possibility that the screws and nuts are stripped and difficult to remove, as well as the relaxation of the original screw channels. Moreover, the exposure and re-fixation surgery of the long-segment screw-rod system has large trauma, long operation time, much bleeding, and high cost.

[0004] Therefore, how to solve the above technical problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a device for repairing a broken spinal rod to solve the problems in the prior art.

[0006] To achieve the above purpose and other related purposes, the present invention provides a device for repairing a broken spinal rod, including a first screw-rod connecting part and a second screw-rod connecting part respectively cooperating with adjacent screws. The first screw-rod connecting part includes a first screw-rod accommodating cavity, the second screw-rod connecting part includes a second screw-rod accommodating cavity, and further includes a first fastener and a second fastener respectively cooperating with the first screw-rod connecting part and the second screw-rod connecting part. The first screw-rod connecting part and the second screw-rod connecting part are connected through a connecting rod accommodating part. The connecting rod accommodating part includes a connecting rod accommodating groove for accommodating a connecting rod, and further includes a third fastener cooperating with the connecting rod accommodating part.

[0007] In some embodiments of the present invention, the opening directions of the first screw-rod accommodating cavity, the second screw-rod accommodating cavity, and the connecting rod accommodating groove cooperate with each other.

[0008] In some embodiments of the present invention, the extending direction of the connecting rod receiving portion is matched with the extending direction of the spine. The connecting rod receiving portion is a cylinder, and the length of the connecting rod receiving portion is 10-60 mm.

[0009] In some embodiments of the present invention, the extending direction of the connecting rod receiving groove is matched with the extending direction of the spine, and the shape of the connecting rod receiving groove is matched with the connecting rod.

[0010] In some embodiments of the present invention, the third fastener can be sleeved on the connecting rod receiving portion, and the sleeving position of the third fastener can be matched with the position where the connecting rod needs to be repaired.

[0011] In some embodiments of the present invention, the third fastener includes a limiting member and a locking member that cooperate with each other and can be sleeved on the connecting rod receiving portion.

[0012] In some embodiments of the present invention, the first nail-rod connecting portion can be sleeved on the nail head of the screw.

[0013] In some embodiments of the present invention, the first nail-rod connecting portion is a cylinder. The outer diameter of the first nail-rod connecting portion is 8-16 mm, the height of the first nail-rod connecting portion is 6-10 mm, the inner diameter of the first nail-rod receiving cavity is 6-14 mm, and the first fastener extends from the side wall of the first nail-rod connecting portion towards its center direction.

[0014] In some embodiments of the present invention, the second nail-rod connecting portion can be sleeved on the nail head of the screw.

[0015] In some embodiments of the present invention, the second nail-rod connecting portion is a cylinder. The outer diameter of the second nail-rod connecting portion is 8-16 mm, the height of the second nail-rod connecting portion is 6-10 mm, the inner diameter of the second nail-rod receiving cavity is 6-14 mm, and the second fastener extends from the side wall of the second nail-rod connecting portion towards its center direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic structural diagram of the spinal rod fracture repair device provided by the present invention.

[0017] Figure 2 Shown is a schematic structural diagram of the spinal rod fracture system that matches the spinal rod fracture repair device provided by the present invention.

[0018] Figure 3 Shown is a schematic diagram of the use of the spinal rod fracture repair device provided by the present invention.

[0019] Figure 4 Shown is a schematic diagram of the use of the spinal rod fracture repair device provided by the present invention.

[0020] Figure 5 Shown is a schematic diagram of the use of the spinal rod fracture repair device provided by the present invention.

[0021] Figure 6 Shown is a schematic diagram of the use of the spinal rod fracture repair device provided by the present invention.

[0022] Description of component labels

[0023] 1 First nail-rod connection part

[0024] 11 First nail-rod accommodation cavity

[0025] 2 Second nail-rod connection part

[0026] 21 Second nail-rod accommodation cavity

[0027] 3 First fastener

[0028] 4 Second fastener

[0029] 5 Connecting rod accommodation part

[0030] 51 Connecting rod accommodation groove

[0031] 6 Third fastener

[0032] 61 Limiting part

[0033] 62 Locking part

[0034] 7 Pedicle screw

[0035] 71 Nail body

[0036] 72 Nail cap

[0037] 8 Connecting rod Detailed implementation manners

[0038] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0039] Please refer to Figures 1 to 6It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0040] As Figure 1 shown, the present invention provides a spinal broken rod repair device, which includes a first nail-rod connecting part 1 and a second nail-rod connecting part 2 that are respectively matched with adjacent screws. The first nail-rod connecting part 1 includes a first nail-rod accommodating cavity 11, the second nail-rod connecting part 2 includes a second nail-rod accommodating cavity 21, and further includes a first fastener 3 and a second fastener 4 that are respectively matched with the first nail-rod connecting part 1 and the second nail-rod connecting part 2. The first nail-rod connecting part 1 and the second nail-rod connecting part 2 are connected through a connecting rod accommodating part 5. The connecting rod accommodating part 5 includes a connecting rod accommodating groove 51 for accommodating a connecting rod, and further includes a third fastener 6 that is matched with the connecting rod accommodating part 5. As Figure 2 shown, a screw-rod system usually includes screws 7 and a connecting rod 8. The screws 7 usually include a screw body 71 and a screw cap 72. In the screw-rod fixation surgery for long segments, when the connecting rod breaks, as Figures 3 to 6 shown, a connecting rod accommodating part and two nail-rod connecting parts can be respectively sleeved on the broken connecting rod and the tails of the pedicle screws on both sides, so that the tails of the screws on both sides are respectively located in the nail-rod accommodating cavities, and the broken connecting rod can be located in the connecting rod accommodating groove 51. Subsequently, the first nail-rod connecting part 1 and the second nail-rod connecting part 2 can be respectively fixed in the nail-rod accommodating cavities through the first fastener 3 and the second fastener 4, and fixed at the position where the connecting rod breaks through the third fastener 6, so that the broken connecting rod is stably located in the connecting rod accommodating groove 51, thereby completing the repair and fixation of the broken connecting rod.

[0041] In the spinal broken rod repair device provided by the present invention, the opening directions of the first nail-rod accommodating cavity 11, the second nail-rod accommodating cavity 21, and the connecting rod accommodating groove 51 are usually matched. For example, the first nail-rod accommodating cavity 11, the second nail-rod accommodating cavity 21, and the connecting rod accommodating groove 51 can usually have openings on the same side of the spinal broken rod repair device, so as to facilitate the connection of the spinal broken rod repair device with the screws and the connecting rod.

[0042] In the spinal rod fracture repair device provided by the present invention, the extending direction of the connecting rod accommodating part 5 is generally matched with the extending direction of the spine, and it generally corresponds to the extending direction of the connecting rod before fracture or the required extending direction of the expected repaired connecting rod. Generally speaking, the connecting rod accommodating part 5 needs to have appropriate dimensions, and the surface shape thereof needs to have a smooth transition for easy use. For example, the connecting rod accommodating part 5 can be a cylinder (such as a cylinder, etc.). For another example, the outer diameter of the connecting rod accommodating part 5 can be 3-12 mm, 4-8 mm, 8-10 mm, or 11-12 mm. The length of the connecting rod accommodating part 5 can generally be adjusted according to the distance between the two nail-rod connecting parts and / or the length of the connecting rod. For example, the length of the connecting rod accommodating part 5 can be 10-60 mm, 20-30 mm, 30-40 mm, 40-50 mm, or 50-60 mm.

[0043] In the spinal rod fracture repair device provided by the present invention, the extending direction of the connecting rod accommodating groove 51 is matched with the extending direction of the spine, and it generally corresponds to the extending direction of the connecting rod before fracture or the required extending direction of the expected repaired connecting rod. The extending direction of the connecting rod accommodating groove 51 is generally consistent with the extending direction of the connecting rod accommodating part 5. Generally speaking, the shape of the connecting rod accommodating groove 51 needs to be matched with the connecting rod, so as to ensure that the repaired connecting rod can be stably located in the connecting rod accommodating groove 51, which is convenient for subsequent fixation. For example, the connecting rod accommodating groove 51 can be a cylinder (such as a cylinder, etc.).

[0044] In the spinal rod fracture repair device provided by the present invention, the third fastener 6 can be sleeved on the connecting rod accommodating part 5, and the sleeving position of the third fastener 6 can generally be matched with the position where the connecting rod needs to be repaired (such as the fracture). During the repair process, when the fractured connecting rod is placed in the connecting rod accommodating groove 51, the third fastener 6 can be used to fasten the two fractured segments of the connecting rod at the fracture of the connecting rod, so that the two fractured segments of the connecting rod and the connecting rod accommodating part 5 form an integral body, which plays a supporting role between the two vertebral bodies. In a specific embodiment of the invention, the third fastener 6 can include a limiting part 61 and a locking part 62 that are sleeved on the connecting rod accommodating part 5 and cooperate with each other. The limiting part 61 can include a bottom, connecting arm parts extending from both ends of the bottom, and a cavity formed between the bottom and the connecting arm parts (similar to a U-shaped structure). The connecting rod can be inserted into the cavity. The connecting arm parts usually have a certain width and can surround the fracture of the connecting rod. The locking part 62 can be a fastening screw, and the fastening screw can be in threaded cooperation with the connecting arm parts, so that the bottom of the locking part 62 and the limiting part 61 can be abutted against the outer periphery of the connecting rod relatively along the radial direction of the connecting rod, realizing the fixation of the fracture of the connecting rod.

[0045] In the spinal broken rod repair device provided by the present invention, the first nail-rod connecting part 1 can generally be sleeved on the nail cap of the pedicle screw. Generally speaking, the first nail-rod connecting part 1 needs to have appropriate dimensions and extension directions, and the surface shape thereof needs to have a smooth transition to ensure a stable connection between the first nail-rod connecting part 1 and the nail cap of the screw. For example, the first nail-rod connecting part 1 can be a cylinder (such as a cylinder, etc.), and a notch matching the connecting rod can be provided on its side wall. The outer diameter of the first nail-rod connecting part 1 can be 4-14 mm, 6-10 mm, 10-12 mm, 12-14 mm, and the inner diameter of the first nail-rod accommodating cavity 11 can be 3-12 mm, 4-8 mm, 8-10 mm, or 10-12 mm. The extension direction of the first nail-rod connecting part 1 is generally consistent with the extension direction of the pedicle screw, and its height (i.e., the dimension in the extension direction of the pedicle screw) can generally be adjusted according to the size of the nail cap. For example, the height of the first nail-rod connecting part 1 can be 6-10 mm, 6-8 mm, or 8-10 mm. The first fastener 3 generally needs to cooperate with the first nail-rod connecting part 1 so as to stably fix between the first nail-rod connecting part 1 and the nail cap of the pedicle screw. For example, the first fastener 3 can be a fastening screw, and the number can be one or more, and it can extend from the side wall of the first nail-rod connecting part 1 towards its center direction.

[0046] In the spinal broken rod repair device provided by the present invention, the second nail-rod connecting part 2 can generally be sleeved on the nail cap of the pedicle screw. Generally speaking, the second nail-rod connecting part 2 needs to have appropriate dimensions and extension directions, and the surface shape thereof needs to have a smooth transition to ensure a stable connection between the second nail-rod connecting part 2 and the nail cap of the screw. For example, the second nail-rod connecting part 2 can be a cylinder (such as a cylinder, etc.), and a notch matching the connecting rod can be provided on its side wall. The outer diameter of the second nail-rod connecting part 2 can be 4-14 mm, 6-10 mm, 10-12 mm, 12-14 mm, and the inner diameter of the second nail-rod accommodating cavity 21 can be 3-12 mm, 4-8 mm, 8-10 mm, or 10-12 mm. The extension direction of the second nail-rod connecting part 2 is generally consistent with the extension direction of the screw, and its height (i.e., the dimension in the extension direction of the screw) can generally be adjusted according to the size of the nail cap. For example, the height of the second nail-rod connecting part 2 can be 6-10 mm, 6-8 mm, or 8-10 mm. The second fastener 4 generally needs to cooperate with the second nail-rod connecting part 2 so as to stably fix between the second nail-rod connecting part 2 and the nail cap of the screw. For example, the second fastener 4 can be a fastening screw, and the number can be one or more, and it can extend from the side wall of the second nail-rod connecting part 2 towards its center direction.

[0047] In long-segment spinal pedicle screw-rod fixation surgery, the fracture of the connecting rod often occurs. With the spinal rod fracture repair device provided by the present invention, through two parts, namely the screw-rod connecting part and the connecting rod accommodating part, it is possible to minimally invasively complete the effective repair and fixation of the fractured spinal connecting rod only by local exposure without removing the original fixation device, and it has good industrialization prospects.

[0048] In summary, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0049] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A spinal rod fracture repair device, characterized in that, It includes a first nail-rod connecting part (1) and a second nail-rod connecting part (2) which are respectively matched with adjacent screws. The first nail-rod connecting part (1) includes a first nail-rod accommodating cavity (11), and the second nail-rod connecting part (2) includes a second nail-rod accommodating cavity (21). It also includes a first fastener (3) and a second fastener (4) which are respectively matched with the first nail-rod connecting part (1) and the second nail-rod connecting part (2). The first nail-rod connecting part (1) and the second nail-rod connecting part (2) are connected by a connecting rod accommodating part (5). The connecting rod accommodating part (5) includes a connecting rod accommodating groove (51) for accommodating a connecting rod, and also includes a third fastener (6) which is matched with the connecting rod accommodating part (5).

2. The spinal rod fracture repair device according to claim 1, characterized in that, The opening directions of the first nail-rod accommodating cavity (11), the second nail-rod accommodating cavity (21) and the connecting rod accommodating groove (51) are matched with each other.

3. The spinal rod fracture repair device according to claim 1, wherein, The extending direction of the connecting rod accommodating part (5) is matched with the extending direction of the spine. The connecting rod accommodating part (5) is a cylinder, and the length of the connecting rod accommodating part (5) is 10.0 - 60.0 mm.

4. The spinal rod fracture repair device according to claim 1, wherein, The extending direction of the connecting rod accommodating groove (51) is matched with the extending direction of the spine, and the shape of the connecting rod accommodating groove (51) is matched with the connecting rod.

5. The spinal rod fracture repair device according to claim 1, wherein, The third fastener (6) can be sleeved on the connecting rod accommodating part (5), and the sleeving position of the third fastener (6) can be matched with the position where the connecting rod needs to be repaired.

6. The spinal rod fracture repair device according to claim 1, wherein, The third fastener (6) includes a limiting part (61) and a locking part (62) which are matched with each other and can be sleeved on the connecting rod accommodating part (5).

7. The spinal rod fracture repair device according to claim 1, characterized in that, The first nail-rod connecting part (1) can be sleeved on the nail head of the screw.

8. The spinal rod fracture repair device according to claim 1, wherein The first nail-rod connecting part (1) is a cylinder. The outer diameter of the first nail-rod connecting part (1) is 4.0 - 14.0 mm, the height of the first nail-rod connecting part (1) is 3.0 - 10 mm, the inner diameter of the first nail-rod accommodating cavity (11) is 3.0 - 12.0 mm, and the first fastener (3) extends from the side wall of the first nail-rod connecting part (1) towards its center direction.

9. The spinal rod fracture repair device according to claim 1, characterized in that, The second nail-rod connecting part (2) can be sleeved on the nail head of the screw.

10. The spinal rod fracture repair device according to claim 1, characterized in that, The second nail-rod connecting part (2) is a cylinder. The outer diameter of the second nail-rod connecting part (2) is 4.0 - 14.0 mm, the height of the second nail-rod connecting part (2) is 3.0 - 10 mm, the inner diameter of the second nail-rod accommodating cavity (21) is 3.0 - 12 mm, and the second fastener (4) extends from the side wall of the second nail-rod connecting part (2) towards its center direction.

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