CN219089429U

CN219089429U - Nerve root drag hook capable of being fixed and adjusted

Info

Publication number: CN219089429U
Application number: CN202223323469.8U
Authority: CN
Inventors: 汲方圆; 张财义
Original assignee: People's Hospital Of Xuancheng City
Current assignee: People's Hospital Of Xuancheng City
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-05-30
Anticipated expiration: 2032-12-12

Abstract

The utility model discloses a nerve root drag hook capable of being fixed and adjusted, which comprises a fixed component, an adjusting component and a drag hook, wherein the fixed component comprises a screw and a threaded sleeve movably sleeved with the head of the screw; the adjusting component comprises a fixed rod, an adjusting rod and a drag hook mounting rod, wherein the fixed rod, the adjusting rod and the drag hook mounting rod are assembled and connected by adopting ball joints, and the lower end of the fixed rod is provided with a fixed part which is in spiral connection with the screw sleeve; the draw hook comprises a hook rod connected with the lower end of the draw hook installation rod and a hook body for pulling nerve roots. The utility model forms a fixed foundation by arranging the screw to screw into the vertebral column, and realizes the fixation of the nerve root retractor by connecting the adjusting component with the fixed retractor, compared with the hand-held mode, the sliding slipping situation is not easy to occur; the position and the angle of the nerve root drag hook can be adjusted through the adjusting component with the ball joint, the nerve root drag hook does not need to be pulled out and inserted again for fixation, and the position and the angle of the nerve root drag point can be adjusted conveniently in the operation process.

Description

Nerve root drag hook capable of being fixed and adjusted

Technical Field

The utility model relates to a nerve root retractor capable of being fixed and adjusted, and belongs to the field of medical auxiliary instruments.

Background

The nerve root retractor is a surgical medical auxiliary instrument and is mainly used for pulling and fixing exposed nerve tissues so as to facilitate the operation. In spinal surgery, for example, when lumbar surgery is used for treating intervertebral discs, in order to more clearly expose lumbar intervertebral discs, the dural sac and nerve roots are pulled to better expose the intervertebral discs for surgery, and a nerve root retractor is needed to be used during the pulling operation.

The existing nerve root retractor comprises a connecting rod and a handle, wherein the retractor is arranged at the far end part of the connecting rod, and medical staff holds the handle to extend the connecting rod into nerve tissues exposed by a patient during operation to hook the nerve root by the retractor so as to carry out traction and fixation. The nerve root drag hook with the structure needs medical staff to hold the handle to continuously drag when in use, the situation that the nerve root drag hook slides due to unstable holding can occur in the drag process, the risk of nerve root injury is increased, and particularly the risk of nerve root drag hook sliding is larger during long-time operation.

In order to solve the above problems, patent CN214804995U provides an under-the-lens nerve retractor which can be fixed on the vertebral body, and adopts the technical scheme that a needle point used for being inserted into the vertebral body is connected in the middle of the bottom of a nerve pulling block, and the needle point is inserted into the vertebral body to realize the fixation of the nerve retractor, so that the sliding is avoided. Although the patent realizes the aim of fixation and anti-sliding, the position of the nerve pulling block after the needle point is inserted into the vertebral body is fixed, the pulling position and angle of the nerve root cannot be adjusted, and if the pulling position and angle of the nerve root need to be adjusted in the operation process, the needle point needs to be pulled out for reinsertion and fixation.

Disclosure of Invention

Aiming at the defects, the utility model provides a nerve root retractor capable of being fixed and adjusted, which adopts the following technical scheme:

the nerve root retractor comprises a fixing component, an adjusting component and a retractor, wherein the fixing component comprises a screw used for screwing into a vertebral body of a vertebral column to form a fixed foundation and a threaded sleeve movably sleeved with the head of the screw; the adjusting component comprises a fixed rod, an adjusting rod and a drag hook mounting rod, wherein the fixed rod, the adjusting rod and the drag hook mounting rod are assembled and connected by adopting ball joints, and the lower end of the fixed rod is provided with a fixed part which is in spiral connection with the screw sleeve; the draw hook comprises a hook rod connected with the lower end of the draw hook installation rod and a hook body for pulling nerve roots.

Further, the fixing rod is L-shaped, and the lower section of the fixing part is provided with external threads matched with the threaded sleeve.

Further, the ball joint comprises a ball shell and a ball head in clearance fit with the ball shell, a high-temperature-resistant rubber sleeve is arranged between the ball head and the ball shell, a locking pin for locking is arranged on the ball shell, and the inner end of the locking pin penetrates through the rubber sleeve to press the ball head.

Further, the hook rod is movably connected with the lower end of the drag hook mounting rod through a connecting piece.

Further, the front end of the hook body is a round head.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the screws are arranged to be screwed into the vertebral bodies of the vertebral columns to form a fixed foundation, the adjusting component is connected with the fixed drag hook to fix the nerve root drag hook, and after the nerve root drag hook is pulled and fixed, the stability is better than that of a hand-held mode of medical staff, and the sliding and slipping situation is not easy to occur. The utility model can realize the position and angle adjustment of the nerve root retractor by the adjusting component with the ball joint, the screw fixing point position selection space is larger due to the adjusting space when the screw is fixed, the operation space can be fully ensured, the position and angle adjustment of the nerve root pulling point can be realized by the adjusting component when the operation is needed after the pulling and fixing are finished, and the fixing screw is not required to be pulled and inserted again.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic view of a ball joint structure according to the present utility model.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

Examples:

referring to fig. 1-2, a nerve root retractor capable of being fixed and adjusted comprises a fixing component, an adjusting component and a retractor, wherein the fixing component comprises a screw 11 for being screwed on a vertebral body of a spine to form a fixed foundation and a threaded sleeve 12 movably sleeved with the head of the screw 11; the adjusting assembly comprises a fixed rod 21, an adjusting rod 22 and a drag hook mounting rod 23, wherein the fixed rod 21, the adjusting rod 22 and the drag hook mounting rod 23 are assembled and connected by adopting a ball joint 40, and a fixed part 211 for being in spiral connection with the screw sleeve 12 is arranged at the lower end of the fixed rod 21; the retractor comprises a hook rod 31 connected with the lower end of the retractor mounting rod 23 and a hook body 32 for pulling nerve roots.

Further, the fixing rod 21 is L-shaped, the lower section of the fixing portion 311 has external threads adapted to the threaded sleeve 12, and the upper end of the fixing portion 311 has a notch for screwing in a screwdriver.

Further, the ball joint 40 includes a ball shell 41 and a ball 42 in clearance fit with the ball shell 41, a high temperature resistant rubber sleeve 43 is provided in front of the ball 42 and the ball shell 41, a locking pin 44 for locking is installed on the ball shell 42, an inner end of the locking pin 44 penetrates through the rubber sleeve 43 to press the ball 42, and a notch for screwing in a screwdriver is formed at an outer end of the locking pin 44. The rubber sleeve 43 is provided to increase friction between the ball head 42 and the ball housing 41 and to absorb shock, so as to avoid the ball head 42 moving in the ball housing 41 due to vibration and shake during use.

Further, the hook rod 31 is movably connected with the lower end of the hook mounting rod 23 through a connecting piece, the connecting piece can be a conical threaded sleeve 33, external threads are arranged at the lower end of the hook mounting rod 23 and the upper end of the hook rod 31, and the hook mounting rod 23 is in threaded connection with the hook rod 31 through the conical threaded sleeve 33, so that the hook is convenient to replace.

Further, the front end of the hook body 32 is rounded, and the hook body 32 is rounded to avoid the front end of the hook body 32 from damaging the nerve root too sharply and to prevent the nerve root from slipping off the hook body 32 during traction.

The nerve root retractor is fixed and adjusted in the following modes: in spinal surgery, such as surgery for treating prolapse of lumbar intervertebral disc, procedures are performed to pull on nerve roots to reveal the intervertebral disc. Screws are screwed into the vertebral bodies of the vertebral column through the threaded sleeves to form a fixed foundation, and the fixing positions of the screws can be selected according to the operation requirement, such as fixing on the pedicles. After the screws are fixed, the adjusting component and the drag hook which are connected and installed are fixedly connected on the screw sleeve through the fixing part of the fixing rod, the hook body of the drag hook is hooked on the nerve root to be pulled to a proper angle and position, and then the locking pin is screwed to lock the ball joint, so that the nerve root pulling fixation is completed. If the nerve root pulling point or the nerve root pulling angle needs to be adjusted in the operation process, the locking pin is unscrewed to be adjusted, and the locking pin is screwed again to lock the ball joint after the adjustment.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the utility model, such changes and modifications are also intended to be within the scope of the utility model.

Claims

1. The utility model provides a nerve root drag hook that can fix and adjust which characterized in that: the device comprises a fixing component, an adjusting component and a drag hook, wherein the fixing component comprises a screw for screwing into a vertebral body of a spine to form a fixed foundation and a threaded sleeve movably sleeved with the head of the screw; the adjusting component comprises a fixed rod, an adjusting rod and a drag hook mounting rod, wherein the fixed rod, the adjusting rod and the drag hook mounting rod are assembled and connected by adopting ball joints, and the lower end of the fixed rod is provided with a fixed part which is in spiral connection with the screw sleeve; the draw hook comprises a hook rod connected with the lower end of the draw hook installation rod and a hook body for pulling nerve roots.

2. The fixable and adjustable nerve root retractor of claim 1, wherein: the fixed rod is L-shaped, and the lower section of the fixed part is provided with external threads matched with the threaded sleeve.

3. The fixable and adjustable nerve root retractor of claim 1, wherein: the ball joint comprises a ball shell and a ball head in clearance fit with the ball shell, a high-temperature-resistant rubber sleeve is arranged between the ball head and the ball shell, a locking pin for locking is arranged on the ball shell, and the inner end of the locking pin penetrates through the rubber sleeve to press the ball head.

4. The fixable and adjustable nerve root retractor of claim 1, wherein: the hook rod is movably connected with the lower end of the drag hook mounting rod through a connecting piece.

5. The fixable and adjustable nerve root retractor of claim 1, wherein: the front end of the hook body is round head type.