Lumbar spondylolisthesis reduction device

Abstract

The utility model discloses a lumbar spondylolisthesis reduction device which comprises a pedicle screw (1) and a titanium rod (2), the front end of the pedicle screw (1) is driven into a lumbar vertebra bone, the titanium rod (2) is installed at the tail of the pedicle screw (1), a supporting device (3) is arranged below the titanium rod (2), and the position of the lumbar vertebra bone at the front end of the pedicle screw (1) is adjusted by changing and adjusting the installation height of the tail of the pedicle screw (1) and the titanium rod (2). According to the lumbar spondylolisthesis reduction device, the titanium rod is supported through the supporting device, two-point stable supporting is formed, the lumbar spondylolisthesis position can be conveniently adjusted, and compared with a complex supporting structure in the prior art, the lumbar spondylolisthesis reduction device is simple in structure and convenient to operate, and lumbar spondylolisthesis reduction becomes simple and easy to implement.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a structure for resetting lumbar spondylolisthesis. Background Art

[0002] The current technology for treating lumbar spondylolisthesis generally involves inserting pedicle screws into both the normal and diseased lumbar vertebrae. A titanium rod is then used to connect the two pedicle screws. The diseased lumbar vertebra is then levered using the normal lumbar vertebra as a fulcrum, causing the lumbar vertebra in the slipped position to slowly move toward the normal lumbar vertebra, thereby resetting the lumbar spondylolisthesis. Because the titanium rod itself has poor rigidity and cannot impart a vertical force to the diseased lumbar vertebra, the prior art has proposed the use of a suspensor to ensure that the pedicle screws can be moved straight up and down. For example, CN221060817U discloses a suspensor for assisting in the reduction of lumbar spondylolisthesis. This suspensor utilizes a designed support structure to move the pedicle screws, but this structure is overly complex. Summary of the Invention

[0003] The technical problem to be solved by the utility model is that a relatively complex suspension structure is adopted in the prior art to adjust the position of the pedicle screws, and a simple lumbar spondylolisthesis reduction device is provided.

[0004] The technical solution of this utility model:

[0005] A lumbar spondylolisthesis reduction device includes a pedicle screw 1 and a titanium rod 2, and is characterized in that the front end of the pedicle screw 1 is driven into the lumbar vertebra, the titanium rod 2 is installed at the tail end of the pedicle screw 1, and a supporting device 3 is provided below the titanium rod 2. The installation height of the tail end of the pedicle screw 1 and the titanium rod 2 can be changed to adjust the position of the lumbar vertebra at the front end of the pedicle screw 1.

[0006] The supporting device 3 is a sleeve with a handle, which is sleeved on the titanium rod 2.

[0007] One end of the sleeve is sleeved on the front end of the titanium rod 2.

[0008] The bottom of the casing has a horizontal surface.

[0009] The supporting device 3 is a hook.

[0010] The bottom of the hook has a horizontal surface.

[0011] There is a mounting groove for the titanium rod 2 at the tail of the pedicle screw 1. The mounting groove is a tubular structure with slots on both sides. The titanium rod 2 passes through the slots on both sides of the tubular structure. There are threads inside the mounting groove and bolts are installed to limit the position of the titanium rod 2.

[0012] Compared with the prior art, the advantages of the present invention are as follows:

[0013] The titanium rod is supported by a supporting device to form a two-point stable support to facilitate adjustment of the lumbar vertebrae at the slipped part. Compared with the complex supporting structure in the existing technology, this device has a simple structure and is easy to operate, making lumbar vertebrae slippage reduction simple and easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the structure of this reset device.

[0015] Figure 2 It is a schematic diagram of a support device in the shape of a suit.

[0016] Figure 3 is a schematic diagram of a hook-shaped support device. DETAILED DESCRIPTION

[0017] Example 1:

[0018] In this embodiment, the supporting device 3 of the titanium rod 2 is a sleeve with a handle.

[0019] The shaded square in the figure represents the slipped lumbar vertebra, and the other three squares represent the normal lumbar vertebra. Pedicle screws 1 are inserted into the slipped lumbar vertebra and the adjacent normal lumbar vertebra. The tail of the pedicle screw 1 is a mounting slot for a titanium rod 2. The mounting slot is a tubular structure with slots on both sides. The mounting slot has threads inside and is equipped with bolts. A titanium rod 2 is passed through the tails of the two pedicle screws 1 in sequence, and the tail bolts of the pedicle screws 1 of the normal lumbar vertebra are tightened. At this time, the tail bolt of the pedicle screw 1 of the slipped lumbar vertebra is first loosened. Then, the sleeve of the support device 3 is sleeved on the distal end of the titanium rod 2 and the handle is held. The support device 3 and the pedicle screws 1 of the normal lumbar vertebra form a two-point support for the titanium rod. At this time, the tail bolt of the pedicle screw 1 of the slipped lumbar vertebra is adjusted with a screwdriver to move the slipped lumbar vertebra to its normal position.

[0020] Furthermore, one end of the sleeve is sealed to prevent the sleeve from moving relative to the titanium rod 2 during operation.

[0021] Furthermore, a horizontal surface is designed at the bottom of the sleeve, which can be placed on the surface of the human body to support the human body and reduce the pressure on the human body.

[0022] Example 2:

[0023] The supporting device 3 in this embodiment is a hook.

[0024] The installation process for the pedicle screws 1 and titanium rods 2 is the same as in Example 1. The pedicle screws 1 are first driven into the lumbar vertebra with spondylolisthesis and the adjacent normal lumbar vertebra. Then, a titanium rod 2 is passed through the two pedicle screws 1 in sequence, and the tail bolt of the normal lumbar vertebra's pedicle screw 1 is tightened. The handle of the support device 3 is held in hand, and the hook below hooks the titanium rod 2. The hook and the normal lumbar pedicle screw 1 form a two-point support for the titanium rod. Adjusting the tail bolt of the lumbar pedicle screw 1 can move the lumbar vertebra to its normal position.

[0025] Furthermore, the lower bottom surface of the hook is designed to be flat, which can be placed on the surface of the human body to support the human body and reduce the pressure on the human body.

[0026] Example 3:

[0027] In this embodiment, both the sleeve-shaped support device 3 and the hook-shaped support device 3 are used.

[0028] First, a pedicle screw 1 is driven into the spondylolisthesis lumbar vertebra and the adjacent normal lumbar vertebra. Then, a titanium rod 2 is sequentially passed through the two pedicle screws 1, and the tail bolt of the pedicle screw 1 of the normal lumbar vertebra is tightened. Afterwards, the sleeve of the support device 3 is sleeved over the distal end of the titanium rod 2 and the handle is held by hand. At the same time, the hook-shaped support device 3 is used to hook the titanium rod portion between the normal lumbar vertebra and the spondylolisthesis lumbar vertebra. With the sleeve structure and the hook structure as the main support points, the tail bolt of the pedicle screw 1 of the spondylolisthesis lumbar vertebra can be adjusted to move the spondylolisthesis lumbar vertebra to its normal position. The pedicle screw 1 in the normal position serves as a secondary support point to reduce the pressure on the normal lumbar vertebra.

Claims

1. A lumbar spondylolisthesis reduction device, comprising a pedicle screw (1) and a titanium rod (2), characterized in that: The front end of the pedicle screw (1) is driven into the lumbar vertebra, the titanium rod (2) is installed at the tail end of the pedicle screw (1), and a support device (3) is provided below the titanium rod (2). The installation height of the tail end of the pedicle screw (1) and the titanium rod (2) is changed to adjust the position of the lumbar vertebra at the front end of the pedicle screw (1).

2. The lumbar spondylolisthesis reduction device according to claim 1, characterized in that: The supporting device (3) is a sleeve with a handle, and the sleeve is sleeved on the titanium rod (2).

3. The lumbar spondylolisthesis reduction device according to claim 2, characterized in that: One end of the sleeve is sleeved on the front end of the titanium rod (2).

4. The lumbar spondylolisthesis reduction device according to claim 2, characterized in that: The bottom of the casing has a horizontal surface.

5. The lumbar spondylolisthesis reduction device according to claim 1, characterized in that: The supporting device (3) is a hook.

6. The lumbar spondylolisthesis reduction device according to claim 5, characterized in that: The bottom of the hook has a horizontal surface.

7. The lumbar spondylolisthesis reduction device according to any one of claims 1 to 6, characterized in that: The tail of the pedicle screw (1) is provided with a mounting groove for the titanium rod (2). The mounting groove is a tubular structure with slots on both sides. The titanium rod (2) passes through the slots on both sides of the tubular structure. The interior of the mounting groove is threaded and a bolt is installed to limit the position of the titanium rod (2).

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