Lumbar spondylolisthesis reduction assist device

Abstract

The utility model discloses a lumbar spondylolisthesis reduction assist device, which relates to the technical field of lumbar spondylolisthesis reduction and comprises a hand lever and a shifting block fixedly connected with the hand lever, the shifting block comprises a supporting piece and a hook piece, the supporting piece and the hook piece are integrally formed, the supporting piece is of a rectangular structure, the hook piece is of an arc-shaped structure, and the cross sectional area of the hook piece is gradually reduced from inside to outside to form a blunt insertion head. The device has the advantages that the upper vertebral body serves as a lever, the hand lever is pulled to pry towards one side slowly, the sliding vertebral body is lifted, the sliding vertebral body is reset according to the lever principle, operation is easy and convenient, dependence on the lifting force of the pedicle screw in the lifting reset process is reduced, complications of loosening of the pedicle screw in the lifting process are avoided, and the safety of the pedicle screw is improved. And the operation effect and the safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lumbar spondylolisthesis reduction, in particular to a lumbar spondylolisthesis reduction assisting device. Background Art

[0002] Lumbar spondylolisthesis is an abnormal connection between the bony structures of the lumbar vertebrae. The upper vertebra slips forward, causing lumbar spinal stenosis and nerve compression. This leads to symptoms such as low back pain, lower limb pain, and numbness, often causing significant pain and even lower limb dysfunction. The primary treatment for spondylolisthesis is reduction and internal fixation. During surgery, the intervertebral disc space is first opened and released, and then the vertebral body is lifted and repositioned using a pedicle screw fixation system to restore spinal stability and decompress the nerves.

[0003] However, currently, clinical reduction of vertebral slippage mostly relies on the lifting effect of pedicle screws. Since lumbar spondylolisthesis mostly occurs in elderly people with osteoporosis, the reduction effect of relying solely on pedicle lifting is limited, reduction is difficult, and pedicle screws are prone to loosening during the lifting process, leading to surgical failure.

[0004] To address the difficulty of insufficient pedicle screw lifting force during reduction, Chinese invention CN106618704A discloses a lumbar spondylolisthesis reduction device and its use method. The device comprises a handle, a connecting rod, and a paddle. The paddle is a flat structure with evenly distributed anti-slip particles and protrusions on its surface. One end of the connecting rod is connected to the handle, and the other end of the connecting rod is connected to the paddle. A handle length adjustment device and a handle angle adjustment device are provided between the handle and the connecting rod. However, this lumbar spondylolisthesis reduction device requires the paddle to be inserted into the front of the vertebral body in order to pry it. Due to the presence of important blood vessels and organs such as the abdominal aorta in front of the vertebral body, there is a high risk of damaging the annulus fibrosus at the anterior edge of the intervertebral space during surgery and inserting the instrument into the anterior edge of the vertebral body, which can lead to serious complications if not handled with caution.

[0005] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content

[0006] In view of the problems in the related art, the purpose of the present invention is to provide a lumbar spondylolisthesis reduction assist device to overcome the above-mentioned technical problems existing in the existing related art.

[0007] The technical solution of the present utility model is achieved as follows:

[0008] A lumbar spondylolisthesis reduction assisting device comprises: a hand lever and a shifting block fixedly connected to the hand lever, wherein;

[0009] The shift block includes: a support member and a hook member, the support member and the hook member are integrally formed, the support member is a rectangular structure, the hook member is an arc-shaped structure, and the cross-sectional area of ​​the hook member gradually decreases from the inside to the outside to form a blunt insertion head.

[0010] Furthermore, the hand rod and the shift block are connected via threads.

[0011] Furthermore, the hand lever is connected to the support member via threads.

[0012] Furthermore, the length of the handle is 150 mm to 200 mm.

[0013] Furthermore, the cross-section of the shift block is 15 mm long and 10 mm high.

[0014] Furthermore, the hand lever and the shift block are both made of stainless steel.

[0015] Beneficial effects of the utility model:

[0016] The utility model uses the upper vertebra as a lever to pull the hand lever slowly to one side to lift the slipped vertebra. It uses the lever principle to reset the slipped vertebra, is easy to operate, reduces the dependence on the lifting force of the pedicle screw during the lifting and reduction process, avoids the complication of loosening of the pedicle screw during the lifting process, and increases the surgical effect and safety.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 1 is a schematic structural diagram of a lumbar spondylolisthesis reduction assisting device according to an embodiment of the present invention;

[0021] In the picture:

[0022] 1. Hand lever; 2. Shift block; 21. Support member; 22. Hook member. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0024] According to an embodiment of the present utility model, a lumbar spondylolisthesis reduction assisting device is provided.

[0025] like Figure 1 As shown, a lumbar spondylolisthesis reduction assisting device comprises: a handle 1 and a shifting block 2 fixedly connected to the handle 1, wherein;

[0026] The shift block 2 includes: a support member 21 and a hook member 22. The support member 21 and the hook member 22 are integrally formed. The support member 21 is a rectangular structure, and the hook member 22 is an arc-shaped structure. The cross-sectional area of ​​the hook member 22 gradually decreases from the inside to the outside to form a blunt insertion head.

[0027] With the help of the above scheme, by using the upper vertebra as a lever, pulling the hand lever 1 slowly to one side to lift the slipped vertebra, it uses the lever principle to reset the slipped vertebra, which is easy to operate, reduces the dependence on the lifting force of the pedicle screw during the lifting and reduction process, avoids the complications of loosening of the pedicle screw during the lifting process, and increases the surgical effect and safety.

[0028] In addition, the hand lever 1 is connected to the shift block 2 through a thread. The hand lever 1 is connected to the support member 21 through a thread.

[0029] This technical solution facilitates disassembly through threaded connection. At the same time, it can also adopt an integrated structure and can be customized according to medical needs.

[0030] In addition, when used, the length of the handle 1 is 150 mm to 200 mm. The cross-section of the shift block 2 is 15 mm long and 10 mm high.

[0031] In addition, the materials of the hand lever 1 and the shift block 2 are respectively stainless steel.

[0032] Specifically, in application, the hand lever 1 and the shift block 2 can also be made of medical ceramic material.

[0033] During the implementation of this technical solution, after the vertebral body is exposed in advance through surgery, non-locking pedicle screws and non-locking connecting rod A are implanted in the slipped vertebral body and the inferior vertebral body; the hook 22 of the lumbar spondylolisthesis reduction aid is fitted with the end of the connecting rod A, and the superior vertebra is used as a lever to pull the hand lever 1 slowly to one side, and the slipped vertebral body can be seen to rise significantly; after the slipped vertebral body is reduced, the pedicle screws and connecting rod A are tightened one by one to complete the reduction and fixation of the slipped vertebral body.

[0034] In summary, with the help of the above-mentioned technical solution of the present invention, the following effects can be achieved: by using the upper vertebra as a lever, pulling the hand lever 1 slowly to one side to lift the slipped vertebra, it uses the lever principle to reset the slipped vertebra, which is easy to operate, reduces the dependence on the lifting force of the pedicle screw during the lifting and reduction process, avoids the complications of loosening of the pedicle screw during the lifting process, and increases the surgical effect and safety.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lumbar spondylolisthesis reduction assisting device, characterized in that: include: A hand lever (1) and a shift block (2) fixedly connected to the hand lever (1), wherein; The shift block (2) comprises: a support member (21) and a hook member (22); the support member (21) and the hook member (22) are integrally formed; the support member (21) is a rectangular structure; the hook member (22) is an arc-shaped structure; and the cross-sectional area of ​​the hook member (22) gradually decreases from the inside to the outside to form a blunt insertion head.

2. The lumbar spondylolisthesis reduction assisting device according to claim 1, characterized in that: The hand lever (1) and the shifting block (2) are connected via threads.

3. The lumbar spondylolisthesis reduction assisting device according to claim 2, characterized in that: The hand lever (1) is connected to the support member (21) via threads.

4. The lumbar spondylolisthesis reduction assisting device according to claim 1, characterized in that: The length of the hand lever (1) is 150 mm to 200 mm.

5. The lumbar spondylolisthesis reduction assisting device according to claim 1, characterized in that: The cross-section of the shift block (2) is 15 mm long and 10 mm high.

6. The lumbar spondylolisthesis reduction assisting device according to claim 1, characterized in that: The hand lever (1) and the shift block (2) are both made of stainless steel.

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