A nerve root retractor for UBE surgery

Abstract

This utility model discloses a nerve root retractor for UBE surgery, relating to the field of auxiliary instruments for minimally invasive spinal surgery. In lumbar discectomy, there are shortcomings in the procedure where an assistant must hold a nerve retractor to retract the nerve during disc removal, which is not always secure and can easily lead to operator fatigue. Improper operation can also easily cause nerve root damage to the patient. This utility model provides a nerve root retractor for UBE surgery, including a Kirschner wire with a retractor plate near its front end and a handle at the upper end. The Kirschner wire includes a pointed portion and a straight rod portion, with the retractor plate positioned near the pointed portion of the straight rod portion. The handle includes a vertically positioned operating rod and a positioning rod, with the positioning rod aligned along the axial direction of the Kirschner wire. A positioning block is provided on the positioning rod.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary instruments for minimally invasive spinal surgery, specifically to a nerve root pusher for UBE surgery. Background Technology

[0002] More and more patients with spinal problems are using unilateral dual-channel endoscopy (UBE) to treat degenerative lesions of the cervical, thoracic, and lumbar spine, and this technique is being rapidly promoted throughout the country.

[0003] However, there are shortcomings in lumbar discectomy. During the disc removal process, an assistant needs to hold a nerve retractor to pull the nerve apart. The fixation is not secure, and the operator is prone to fatigue. If the operation is not performed properly, it can easily cause nerve root damage to the patient.

[0004] A search revealed Chinese patent CN220988842U, which proposes a novel nerve retraction screw for UBE surgery. The screw includes a handle and a retraction screw. The handle consists of a wooden grip and a magnetic sleeve, with the lower end of the magnetic sleeve having an internal hexagonal socket. The retraction screw comprises a hexagonal prism-shaped rod inserted into the internal hexagonal socket. A straight rod is connected to the lower end of the hexagonal prism-shaped rod. A flat pusher is connected to the lower end of the straight rod, and a self-tapping screw is connected to the lower end of the flat pusher. This invention, by connecting the retraction screw to the handle, allows the retraction screw to be screwed into the facet joint. When the nerve root or dural sac is retracted using the wide, flat pusher, it can be operated without an assistant, saving manpower. This method also ensures the stability of the hook body, minimizing secondary injury to the patient. When operation through the operating channel is required, the handle can be removed to avoid obstruction. When the retraction screw needs to be removed, the handle can be connected to directly unscrew it.

[0005] Although the above-mentioned device can achieve fixed retraction of the nerve root, the flat pusher plate will be blocked by the surrounding nerve root during the process of screwing the self-tapping screw into the facet joint. Therefore, other instruments are needed to traction the nerve root during the process of fixing and removing the self-tapping screw, which is more complicated and may cause damage to the nerve root. Utility Model Content

[0006] To address the aforementioned problems, this invention aims to provide a nerve root manipulator for UBE surgery, which can improve the stability of the traction nerve root, facilitate operation, and reduce the need for other auxiliary instruments.

[0007] The main idea of ​​the technical solution adopted in this utility model is as follows: By designing a combination of Kirschner wire and pusher, the pusher is set near the lower end of the Kirschner wire. When the Kirschner wire is inserted into the facet joint parallel to the nerve root, it can be rotated 90 degrees to push the nerve root away from the facet joint, exposing the intervertebral disc and facilitating subsequent operations. A handle is set on the top of the Kirschner wire, and the handle is perpendicular to the pusher. When the pusher rotates 90 degrees to perform the pushing action, the handle is parallel to the head-to-tail line of the human body and does not affect the surgical operation.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A nerve root pusher for UBE surgery includes a Kirschner wire, a pusher plate is provided near the front end of the Kirschner wire, and a handle is provided at the end of the Kirschner wire.

[0010] Furthermore, through the above technical solution, the horizontal axis of the handle intersects and is perpendicular to the vertical axis of the push plate.

[0011] Furthermore, based on the above technical solution, the Kirschner wire includes a spike portion and a straight rod portion, and the pusher plate is disposed on the straight rod portion near the spike portion.

[0012] Furthermore, based on the above technical solution, the handle includes a vertically arranged operating rod and a positioning rod, wherein the positioning rod is arranged along the axial direction of the Kirschner wire.

[0013] Furthermore, the positioning rod is provided with a positioning block in accordance with the above technical solutions.

[0014] Furthermore, the above technical solution includes the following: the operating lever and the positioning lever are provided with anti-slip grooves.

[0015] Furthermore, based on the above technical solution: the longitudinal length of the pusher is 5mm, the transverse width is 3mm, and the thickness is 0.2-0.3mm; the distance between the bottom of the pusher and the front end of the Kirschner wire's spike is 6mm.

[0016] The beneficial effects of this utility model are:

[0017] By designing a combination of Kirschner wire and pusher, with the pusher positioned near the lower end of the Kirschner wire, once the Kirschner wire is inserted parallel to the facet joint close to the nerve root, rotating it 90 degrees will push the nerve root away from the facet joint, exposing the intervertebral disc and facilitating subsequent operations.

[0018] A handle is located on the top of the Kirschner wire, and the handle is perpendicular to the pusher. When the pusher rotates 90 degrees to perform the pushing action, the handle is parallel to the head and tail line of the human body, which does not affect the surgical operation.

[0019] The handle has a T-shaped structure, making it easy for medical staff to grip. The handle is equipped with anti-slip grooves to increase friction and prevent slippage during operation, which could affect the surgical process. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the present invention from another angle;

[0022] Figure 3 A schematic diagram of the state before the nerve root was moved during UBE surgery;

[0023] Figure 4 A schematic diagram showing the state of the nerve root after UBE surgery.

[0024] Figure 5 This is a schematic diagram of the state before the nerve root is pushed by the pusher.

[0025] Figure 6 A schematic diagram showing the state of the nerve root after the pusher rotates and pushes it.

[0026] Among them: 1. Kirschner wire; 101. Spike part; 102. Straight rod part; 2. Push plate; 3. Handle; 301. Operating rod; 302. Positioning rod; 303. Anti-slip groove; 304. Positioning block;

[0027] a. Spinal cord; b. Nerve root; c. Facet joint; d. Intervertebral disc. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] The inventors' research has found that an increasing number of patients with spinal problems are using unilateral dual-channel endoscopy (UBE) to treat degenerative lesions of the cervical, thoracic, and lumbar spine, and this technique is rapidly being promoted nationwide. However, it has shortcomings in lumbar discectomy. During disc removal, an assistant needs to hold a nerve retractor to retract the nerve, which is not always secure, and the operator is prone to fatigue. Improper operation can easily cause nerve root damage to the patient.

[0030] Based on the above findings, this application proposes a nerve root retractor for UBE surgery. The device combines a Kirschner wire and a retractor plate. The retractor plate is positioned near the lower end of the Kirschner wire. When the Kirschner wire is inserted parallel to the facet joint close to the nerve root, a 90-degree rotation pushes the nerve root away from the facet joint, exposing the intervertebral disc and facilitating subsequent procedures. A handle is located above the Kirschner wire, perpendicular to the retractor plate. When the retractor plate rotates 90 degrees for the retracting action, the handle is parallel to the head-to-tail line of the human body, without affecting the surgical procedure. The handle has a T-shaped structure for easy gripping by medical personnel, and anti-slip grooves increase friction to prevent slippage during operation and ensure the surgical progress is not affected.

[0031] Example 1

[0032] See Figures 1-6 This application discloses a nerve root retractor for UBE surgery, including a Kirschner wire 1, which adopts the existing Kirschner wire 1 structure. The front end is provided with a spike 101, which can be inserted into the bone to play a temporary fixation role, and the rear end is a straight rod 102, which is integrally connected with the spike 101.

[0033] A pusher plate 2 is provided on the straight rod portion 102 of the Kirschner wire 1. The pusher plate 2 is located on the straight rod portion 102 near the spike portion 101. The pusher plate 2 is a rectangular thin plate and is fixedly connected to the straight rod portion 102.

[0034] A handle 3 is provided above the Kirschner wire 1. The handle 3 has a T-shaped structure, with a horizontally positioned operating lever 301 at the top. Multiple anti-slip grooves 303 are provided above the operating lever 301 to increase friction and prevent slippage. The anti-slip grooves 303 can also be replaced with other anti-slip patterns, with the same effect.

[0035] A positioning rod 302 is vertically positioned below the operating lever 301, and the positioning rod 302 is arranged along the axial direction of the Kirschner wire 1. The positioning rod 302 has a cuboid structure, with its long side being the same length as the width of the operating lever 301, and its short side being parallel to the operating lever 301. Anti-slip grooves 303 are provided on both side walls of the positioning rod 302. The operating lever 301 is arranged parallel to the push plate 2, and a positioning block 304 is provided on the front of the positioning rod 302. The positioning block 304 faces the same direction as the push plate 2, and the direction of the push plate 2 can be determined by observing the direction of the positioning block 304.

[0036] Example 2

[0037] refer to Figures 1-6 Based on Embodiment 1, the longitudinal length of the pusher plate 2 is 5mm, the transverse width is 3mm, and the thickness is 0.2-0.3mm; the distance between the bottom of the pusher plate 2 and the front end of the spike 101 of the Kirschner wire 1 is 6mm; the length of the operating rod 301 is 5cm; and the height of the positioning rod 302 is 5cm.

[0038] The overall length of the pusher is 25-35cm. When pushing nerve root b, the bottom 10cm of the Kirschner wire 1 is inside the body, and the rest is outside the body.

[0039] Application Cases

[0040] This device is mainly used in unilateral dual-channel endoscopic discectomy (UBE surgery) to push and pull nerve root b. The main purpose is to facilitate the pushing and pulling of nerve root b. The spinal cord a is located on the side of nerve root b. This prevents accidental injury to nerve root b during the removal of the herniated disc d. The 90° cross design of handle 3 and pushing plate 2 allows the nerve root b to be pushed and pulled away after rotating 90°. The pusher handle 3 is then parallel to the head-to-tail line of the human body, without affecting the surgical operation.

[0041] In practice, the Kirschner wire 1 is first inserted into the facet joint c on one side of the intervertebral disc d, and the insertion position should be selected close to the nerve root b (the specific location of the Kirschner wire 1 in the bone and the specific method of insertion are determined by the doctor based on his professional skills, which is the existing technology, so it will not be elaborated here). During the insertion process, the pusher 2 is close to the nerve root b. After the insertion is completed, the medical staff holds the handle 3 and rotates it 90 degrees, so that the pusher 2 rotates towards the side closer to the nerve root b, which can push the nerve root b away, that is, the nerve root b moves away from the intervertebral disc d.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A nerve root retractor for UBE surgery, characterized in that, Includes Kirschner wires (1), a pusher plate (2) is provided near the front end of the Kirschner wires (1), and a handle (3) is provided at the end of the Kirschner wires (1); The horizontal axis of the handle (3) intersects and is perpendicular to the vertical axis of the push plate (2).

2. The nerve root retractor for UBE surgery according to claim 1, characterized in that: The handle (3) includes a vertically arranged operating rod (301) and a positioning rod (302), the positioning rod (302) being arranged along the axial direction of the Kirschner wire (1).

3. The nerve root retractor for UBE surgery according to claim 2, characterized in that: The positioning rod (302) is provided with a positioning block (304).

4. The nerve root retractor for UBE surgery according to claim 2, characterized in that: The operating lever (301) and positioning lever (302) are provided with anti-slip grooves (303).

5. The nerve root retractor for UBE surgery according to claim 1, characterized in that: The Kirschner wire (1) includes a spike (101) and a straight rod (102), and the pusher (2) is located on the straight rod (102) near the spike (101).

6. The nerve root retractor for UBE surgery according to claim 1, characterized in that: The longitudinal length of the pusher (2) is 5mm, the transverse width is 3mm, and the thickness is 0.2-0.3mm; the distance between the bottom of the pusher (2) and the front end of the spike (101) of the Kirschner wire (1) is 6mm.

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