Minimally invasive nerve protection decompression equipment for spinal canal stenosis

Abstract

The invention discloses a spinal stenosis minimally invasive nerve protection decompression device, and relates to the related field of spinal stenosis minimally invasive, the spinal stenosis minimally invasive nerve protection decompression device comprises a fixing cylinder, the outer side of the upper end of the fixing cylinder is fixedly provided with a connecting block, and the lower end of the circle center of the fixing cylinder is movably provided with a fixing long needle; the top of the fixed long needle is fixed to the bottom end of the rotating ball body, a locking mechanism is arranged at the bottom of the threaded pipe, and the locking mechanism acts between the rotating ball body and the fixed ball body to achieve relative locking of the rotating ball body and the fixed ball body. According to the spinal canal stenosis minimally invasive nerve protection decompression equipment, a second rotating block drives a threaded pipe to move downwards, an arc-shaped ball is driven to extrude two sets of symmetrical locking blocks, the position of a drag hook can be accurately controlled, and the complexity and injury risk of manual nerve traction are avoided; through the cooperation of the penetrating type cleaning pipe and the one-way nozzle, the operation area can be cleaned synchronously, the pollution hidden danger in the operation is reduced, and the multiple requirements for nerve protection, operation efficiency and operation precision in the minimally invasive scene are met on the whole.

Description

Technical Field

[0001] This invention relates to the field of minimally invasive spinal stenosis technology, specifically to a minimally invasive neuroprotective decompression device for spinal stenosis. Background Technology

[0002] Spinal stenosis is a common degenerative disease in spinal surgery. It is mainly caused by factors such as intervertebral disc degeneration, bone hyperplasia, ligamentum flavum hypertrophy, and lamina thickening, which lead to a reduction in the volume of the spinal canal. This, in turn, compresses the dural sac, nerve roots, or spinal cord, causing symptoms such as low back and leg pain, limb numbness, muscle weakness, and even bowel and bladder dysfunction, which seriously affects the patient's quality of life. For patients with moderate to severe stenosis or those who do not respond to conservative treatment, surgical decompression is the core treatment for restoring the volume of the spinal canal and relieving nerve compression. Decompression equipment is required during the treatment.

[0003] In existing decompression devices, after the dura mater and nerve are dissected, the surgical assistant relies on manual traction along the nerve, making the dissection process cumbersome. To address this issue, a nerve traction protection device disclosed in existing technology (Chinese patent application number CN202323370139.9, application date 2023-12-11) can be referenced. This protection device, through the arrangement of a drive shaft, gearbox, lead screw, clamping plate, clamping block, and connecting block, allows the two clamping blocks to be closed by rotating the drive shaft to clamp the nerve. The nerve is then adsorbed using an adsorption device via an adsorption tube, adsorption head, and control valve. This invention eliminates the need for tweezers or other picking devices to retrieve nerves, effectively preventing damage to surrounding tissues and protecting the patient. It also improves practicality. Furthermore, it references existing technology (Chinese patent application CN200910031810.2, filed July 14, 2009) which discloses an interspinous process decompression device. This device is rationally designed, simple in structure, and easy to install surgically, reducing patient discomfort and facilitating postoperative recovery. It provides a safer and less invasive internal fixation implant for patients who have failed conservative treatment or for whom decompression surgery is more risky. Moreover, this invention does not damage any bone or soft tissue, making it a minimally invasive procedure typically performed under local anesthesia. It primarily prevents spinal canal and nerve root canal stenosis, restricts extension, and reduces intradiscal pressure and articular surface load. This invention provides an ideal surgical treatment option for treating neurogenic intermittent claudication caused by spinal canal stenosis, and is an internal fixation implant. Finally, it can be referenced to the prior art (Chinese Patent Application No. CN202410712531.7, filed on 2024-06-04) which discloses a detachable spinal dual-channel endoscopic nerve protection device and its usage method. This device can reduce collateral nerve damage; the retractor is made of transparent polypropylene material, allowing the surgeon to observe the contact between the nerve and the retractor in real time, avoiding nerve damage caused by blind operation. Simultaneously, the integrated miniature pressure sensor monitors the retractor traction force, and the microelectrode monitors nerve function and provides real-time data feedback, further reducing the risk of nerve damage.

[0004] Although the application of the above-mentioned devices in clinical surgery can simplify the operation process and improve the convenience of use to a certain extent, their applicability in minimally invasive surgery scenarios is still limited. Specifically, when the surgery needs to operate on the hidden areas of the patient's internal anatomical structure, the angle of the needle needs to be adjusted adaptively. However, after the existing devices have completed any angle adjustment, it is difficult to achieve a stable locking effect. This technical defect directly increases the complexity of the minimally invasive surgery process and may indirectly affect the accuracy and efficiency of the surgery.

[0005] Therefore, we propose a minimally invasive neuroprotective decompression device for spinal stenosis to address the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a minimally invasive nerve protection and decompression device for spinal stenosis, in order to solve the problem mentioned in the background art that current nerve protection and decompression devices on the market require adaptive adjustment of the needle angle when operating on hidden areas of the patient's internal anatomy. However, after completing arbitrary angle adjustment, existing devices are difficult to achieve a stable locking effect. This technical defect directly increases the complexity of the minimally invasive surgical procedure and may indirectly affect the accuracy and efficiency of the surgery.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a minimally invasive nerve protection and decompression device for spinal stenosis, comprising a fixing cylinder, a connecting block fixed to the outer side of the upper end of the fixing cylinder, a fixing long needle movably disposed at the lower end of the center of the fixing cylinder, and a pull hook movably disposed below the connecting block; a first rotating block and a second rotating block are rotatably disposed on the inner side of the connecting block, an adjustment mechanism is disposed on the outer side of the first rotating block, the outer side of the adjustment mechanism acts on the top position of the pull hook to achieve position adjustment of the pull hook on the outer side of the lower end of the fixing cylinder; the top of the fixing long needle is fixed to the bottom end of a rotating ball, the inner side of the rotating ball is rotatably engaged with the outer side of the fixing ball, the inner side of the second rotating block is threadedly connected to the outer side of a threaded tube, and a locking mechanism is disposed at the bottom of the threaded tube to achieve relative locking between the rotating ball and the fixing ball.

[0008] Preferably, the hook is made of polyethylene, and a scale strip is provided on the top outer side of the first rotating block for precise adjustment of the hook position; the upper and lower outer sides of the second rotating block are fixed with mating rotating balls, and the outer sides of the mating rotating balls are slidably disposed on the inner side of the fixed cylinder and the connecting block.

[0009] Preferably, the adjusting mechanism includes a threaded rod fixed at the center of the first rotating block, the outer side of the threaded rod being rotatably disposed on the inner side of the connecting block, the outer bottom of the threaded rod being threadedly connected to the inner side of the moving block, the outer side of the moving block being slidably disposed on the inner side of the guide block, and the bottom of the moving block being fixed to the top side of the hook.

[0010] Preferably, the sidewall of the guide block is fixed to the outer surface of the fixed cylinder, and the movable block forms a sliding structure with the inner side of the guide block through a threaded rod. The sliding structure is used to limit the rotation of the movable block and guide it to move along the axial direction of the guide block.

[0011] Preferably, the locking mechanism includes an arc-shaped ball fixed to the bottom of the threaded tube. The outer side of the lower end of the arc-shaped ball is attached to the outer side of two sets of locking blocks. The outer side of the locking block extends out of the inner side of the rotating ball and is adapted to the inner wall of the fixed ball. The outer side of the locking block is fixedly connected to one end of a return spring, and the other end of the return spring is fixed to the inner wall of the rotating ball.

[0012] Preferably, the outer side of the fixed sphere is rotatably disposed on the inner side of the rotating sphere, the two sets of locking blocks move in opposite directions, and the two sets of locking blocks are symmetrically distributed about the axis of the threaded tube.

[0013] Preferably, the arc-shaped ball has a mating groove on the side near the locking block, and the inner dimension of the mating groove matches the outer dimension of the locking block. The mating groove is used to engage with the locking block when the arc-shaped ball moves downward to enhance locking stability.

[0014] Preferably, a limiting block is fixed inside the fixed cylinder, and the limiting block is sleeved on the outside of the threaded tube. The limiting block is used to restrict the radial movement of the threaded tube and only allows the threaded tube to move up and down along the axial direction of the fixed cylinder.

[0015] Preferably, the threaded tube is through-hole, and a cleaning tube is inserted inside the threaded tube. The bottom of the cleaning tube passes through the interior of the arc-shaped ball, the fixed ball, and the rotating ball in sequence. A through hole is opened at the bottom end of the rotating ball, and the bottom end of the rotating ball is connected to a one-way nozzle. The one-way nozzle is located on the outer side of the upper end of the fixed long needle, and the one-way nozzle is used to spray cleaning fluid into the surgical area.

[0016] Preferably, the cleaning tube is made of a flexible hose, and a groove is provided on the inner side of the upper end of the cleaning tube near the rotating ball, and the groove is in the same position as the through hole. The groove is used to adapt to the rotation of the rotating ball, so as to avoid damage or blockage of the cleaning tube due to the adjustment of the angle of the rotating ball.

[0017] Compared with the prior art, the beneficial effects of this invention are as follows: This minimally invasive nerve protection and decompression device for spinal stenosis drives the threaded tube downward through the second rotating block, causing the arc-shaped ball to compress two sets of symmetrical locking blocks. Combined with the elastic reset of the reset spring and the engaging positioning of the groove, it can stably lock the rotating ball and the fixed ball, ensuring that the fixed long needle remains secure after any angle adjustment, eliminating the need for repeated adjustments to the locking state, greatly simplifying the operation process and avoiding surgical deviations caused by unstable locking. Simultaneously, the adjustment mechanism on the outside of the first rotating block can precisely control the position of the hook, avoiding the tediousness and risk of damage from manual nerve traction. The combination of the through-type cleaning tube and the one-way nozzle allows for simultaneous cleaning of the surgical area, reducing the risk of intraoperative contamination. Overall, it meets the multiple requirements of nerve protection, operational efficiency, and surgical precision in minimally invasive scenarios. Specific details are as follows: 1. Two sets of counter-distributed locking blocks, driven by an arc-shaped ball, can evenly conform to the inner wall of the fixed ball. Combined with the instant reset capability of the return spring, it can achieve high-strength locking after angle adjustment and can also be quickly unlocked by rotating the second rotating block in the opposite direction. The angle can be adjusted again without disassembling the parts. In addition, the limiting block in the fixed cylinder can limit the radial displacement of the threaded tube, avoid locking failure caused by the misalignment of the threaded tube during the locking process, further reduce the risk of accidental nerve damage, and improve the operational reliability in complex minimally invasive scenarios. 2. The retractor is made of polyethylene, which combines flexibility and support, reducing mechanical stimulation when traction on nerves; the cleaning tube is a flexible soft tube with an adaptable groove, which can deform synchronously with the angle adjustment of the rotating ball, avoiding tube damage or blockage and ensuring a continuous and stable delivery of cleaning fluid; the surgeon can complete the angle adjustment, locking and cleaning operations with one hand, reducing the number of assistant steps, shortening the operation time and reducing the probability of postoperative complications. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a schematic diagram of the main cross-sectional structure of the fixed cylinder of the present invention; Figure 4 This is a schematic diagram of the main structure of the second rotating block of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the main cross-sectional structure of the rotating sphere of the present invention; Figure 7 This is a schematic diagram of the front cross-sectional structure of the fixed sphere of the present invention; Figure 8 For the present invention Figure 7 Enlarged structure at point B Show intention; Figure 9 This is a schematic diagram of the main cross-sectional structure of the locking block of the present invention.

[0019] In the diagram: 1. Fixed cylinder; 2. Connecting block; 3. First rotating block; 4. Threaded rod; 5. Moving block; 6. Guide block; 7. Hook; 8. Fixed long needle; 9. Second rotating block; 91. Matching rotating ball; 10. Threaded tube; 11. Arc-shaped ball; 12. Matching groove; 13. Locking block; 14. Return spring; 15. Fixed ball; 16. Rotating ball; 17. Cleaning tube; 18. Through hole; 19. One-way nozzle. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-9 The present invention provides the following technical solution: a minimally invasive nerve protection and decompression device for spinal stenosis.

[0022] Example 1: To address the issue that current neuroprotective decompression devices on the market require adaptive adjustment of the needle angle when operating on hidden areas of the patient's anatomical structures during surgery; however, existing devices struggle to achieve a stable locking effect after arbitrary angle adjustment. This technical deficiency directly increases the complexity of minimally invasive surgical procedures and may indirectly affect surgical precision and efficiency. Please refer to the appendix... Figure 1 -Appendix Figure 3 and attached Figure 6 -Appendix Figure 9 The top of the fixed long needle 8 is fixed to the bottom of the rotating ball 16. The inner side of the rotating ball 16 is rotatably fitted to the outer side of the fixed ball 15. The inner side of the second rotating block 9 is threadedly connected to the outer side of the threaded tube 10. A locking mechanism is provided at the bottom of the threaded tube 10. The locking mechanism acts between the rotating ball 16 and the fixed ball 15 to achieve relative locking between the rotating ball 16 and the fixed ball 15. The locking mechanism includes an arc-shaped ball 11 fixed to the bottom of the threaded tube 10. The outer side of the lower end of the arc-shaped ball 11 is attached to the outer side of two sets of locking blocks 13. The outer side of the locking block 13 extends out of the inner side of the rotating ball 16 and is adapted to the inner wall of the fixed ball 15. The outer side of the locking block 13 is fixedly connected to one end of the return spring 14. The other end of the spring 14 is fixed to the inner wall of the rotating ball 16; the outer side of the fixed ball 15 is rotatably set on the inner side of the rotating ball 16, the two sets of locking blocks 13 move in opposite directions, and the two sets of locking blocks 13 are symmetrically distributed about the axis of the threaded tube 10; the arc-shaped ball 11 has a mating groove 12 on the side near the locking block 13, the inner dimension of the mating groove 12 matches the outer dimension of the locking block 13, and the mating groove 12 is used to engage with the locking block 13 when the arc-shaped ball 11 moves down to enhance the locking stability; a limit block is fixed inside the fixed cylinder 1, and the limit block is sleeved on the outer side of the threaded tube 10. The limit block is used to restrict the radial movement of the threaded tube 10, and only allows the threaded tube 10 to move up and down along the axial direction of the fixed cylinder 1.

[0023] First, the top of the fixed long needle 8 is fixed to the rotating ball 16, while the inner side of the rotating ball 16 rotates in conjunction with the outer side of the fixed ball 15. By pushing the fixed long needle 8 with external force, the rotating ball 16 can rotate arbitrarily around the fixed ball 15, thereby adjusting the surgical angle of the fixed long needle 8 to meet the puncture needs of different surgical sites. After the angle is adjusted to the target position, the second rotating block 9 is rotated. Because the second rotating block 9 is threadedly connected to the inner side of the threaded tube 10, and the limiting block inside the fixed cylinder 1 sleeves the threaded tube 10 and restricts its radial movement, allowing it to move up and down along the axis of the fixed cylinder 1, the rotation of the second rotating block 9 will drive the threaded tube 10 to move vertically downward. As the threaded tube 10 moves downward, the arc-shaped ball 11 at the bottom moves downward simultaneously. The outer side of the lower end of the arc-shaped ball 11 gradually presses against two sets of locking blocks 13 symmetrical about the axis of the threaded tube 10, forcing the two sets of locking blocks 13 to move in opposite directions and extend out of the inner side of the rotating ball 16 until they are tightly fitted with the inner wall of the fixed ball 15. At the same time, the mating groove 12 on the arc-shaped ball 11 precisely engages with the locking block 13, further enhancing the locking stability. If a second angle adjustment is required, the second rotating block 9 is rotated in the opposite direction, and the threaded tube 10 moves the arc-shaped ball 11 upward. The locking block 13 is reset under the elastic tension of the return spring 14, releasing the lock on the rotating ball 16, and the angle can be adjusted again.

[0024] Example 2: To facilitate the peeling process via hook 7 and thus reduce pressure, please refer to the attached document. Figure 1 -Appendix Figure 3 The device includes a fixed cylinder 1, a connecting block 2 fixed to the outer upper end of the fixed cylinder 1, a fixed long needle 8 movably disposed at the lower end of the center of the fixed cylinder 1, and a hook 7 movably disposed below the connecting block 2. A first rotating block 3 and a second rotating block 9 are rotatably disposed on the inner side of the connecting block 2. An adjustment mechanism is disposed on the outer side of the first rotating block 3, and the outer side of the adjustment mechanism acts on the top position of the hook 7 to adjust the position of the hook 7 on the outer lower end of the fixed cylinder 1. The hook 7 is made of polyethylene. A scale strip is disposed on the outer top of the first rotating block 3 for precise adjustment of the position of the hook 7. Matching rotating balls are fixed to the outer sides of both the upper and lower ends of the second rotating block 9. 91, the outer side of the rotating ball 91 is slidably disposed on the inner side of the fixed cylinder 1 and the connecting block 2; the adjusting mechanism includes a threaded rod 4 fixed at the center position of the first rotating block 3, the outer side of the threaded rod 4 is rotatably disposed on the inner side of the connecting block 2, the outer side of the bottom of the threaded rod 4 is threadedly connected to the inner side of the moving block 5, the outer side of the moving block 5 is slidably disposed on the inner side of the guide block 6, and the bottom of the moving block 5 is fixed to the top side of the hook 7; the side wall of the guide block 6 is fixed to the outer surface of the fixed cylinder 1, and the moving block 5 forms a sliding structure with the inner side of the guide block 6 through the threaded rod 4. The sliding structure is used to limit the rotation of the moving block 5 and guide it to move axially along the guide block 6.

[0025] First, the top side of the hook 7 is fixed to the movable block 5, while the outer side of the movable block 5 is slidably embedded in the inner side of the guide block 6. The side wall of the guide block 6 is fixed to the outer surface of the fixed cylinder 1. This structure restricts the movable block 5 from rotating around its own axis and only allows it to slide along the axial direction of the guide block 6.

[0026] When the position of the hook 7 needs to be adjusted, the first rotating block 3 is rotated: the threaded rod 4, whose center is fixed, rotates synchronously with it, and the outer side of the threaded rod 4 is rotated in conjunction with the connecting block 2 to ensure stable rotation; because the inner side of the moving block 5 is threadedly connected to the outer bottom of the threaded rod 4, the rotation of the threaded rod 4 will be converted into the moving block 5 moving along the axial direction of the guide block 6, thereby driving the hook 7 to move synchronously, realizing the position adjustment of the hook 7 on the outer side of the lower end of the fixed cylinder 1; at the same time, the scale bar on the outer side of the top of the first rotating block 3 can display the adjustment amount in real time to ensure the accuracy of the hook 7 position adjustment; the hook 7 is made of polyethylene material, which has both flexibility and support, and can reduce the mechanical stimulation of nerves during traction; in addition, the mating rotating balls 91 at the upper and lower ends of the second rotating block 9 slide inside the fixed cylinder 1 and the connecting block 2, providing stable support for the overall adjustment structure.

[0027] Example 3: This example differs from Example 1 in that it primarily discloses a convenient cleaning procedure. Please refer to the attached document. Figure 1 -Appendix Figure 4 Appendix Figure 6 and attached Figure 7 The threaded tube 10 has a through-hole design, through which a cleaning tube 17 is installed. The bottom of the cleaning tube 17 passes through the interior of the arc-shaped ball 11, the fixed ball 15, and the rotating ball 16 in sequence. The bottom end of the rotating ball 16 has a through hole 18, which is connected to a one-way nozzle 19. The one-way nozzle 19 is located on the outer side of the upper end of the fixed long needle 8 and is used to spray cleaning fluid into the surgical area. The cleaning tube 17 is made of a flexible tube. A groove is provided on the inner side of the upper end of the cleaning tube 17 near the rotating ball 16, and the groove is located at the same position as the through hole 18. The groove is used to adapt to the rotation of the rotating ball 16 to prevent the cleaning tube 17 from being damaged or blocked due to the adjustment of the angle of the rotating ball 16.

[0028] First, the cleaning tube 17 passes through the threaded tube 10, with the bottom of it sequentially passing through the arc-shaped ball 11, the fixed ball 15, and the rotating ball 16, forming a cleaning fluid delivery channel. The through-hole 18 at the bottom of the rotating ball 16 connects to the one-way nozzle 19, which is located on the outer side of the upper end of the fixed long needle 8, precisely aligned with the surgical area. During the cleaning operation, external cleaning fluid is injected through the inlet of the cleaning tube 17 and flows sequentially through the threaded tube 10, the arc-shaped ball 11, the fixed ball 15, and the rotating ball 16 along the internal channel of the cleaning tube 17. The solution then enters the one-way nozzle 19 through the through hole 18, and is finally sprayed directionally to the surgical area by the one-way nozzle 19 to clean bloodstains and tissue debris. At the same time, the cleaning tube 17 is made of flexible tubing, and a groove is opened on the inner side of its upper end near the rotating ball 16. The groove is adapted to the rotation trajectory of the rotating ball 16. When the rotating ball 16 adjusts its angle around the fixed ball 15, the cleaning tube 17 can adapt to the rotation movement synchronously with the deformation of the groove, avoiding damage or blockage of the cleaning tube 17 due to angle adjustment, and ensuring stable delivery of cleaning fluid.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A minimally invasive nerve protection and decompression device for spinal stenosis, comprising a fixation cylinder (1), a connecting block (2) fixed to the outer side of the upper end of the fixation cylinder (1), a fixing long needle (8) movably disposed at the lower end of the center of the fixation cylinder (1), and a pull hook (7) movably disposed below the connecting block (2); characterized in that: The inner side of the connecting block (2) is rotatably provided with a first rotating block (3) and a second rotating block (9). The outer side of the first rotating block (3) is provided with an adjustment mechanism. The outer side of the adjustment mechanism acts on the top position of the hook (7) to realize the position adjustment of the hook (7) on the outer side of the lower end of the fixed cylinder (1). The top of the fixed long needle (8) is fixed to the bottom end of the rotating ball (16). The inner side of the rotating ball (16) is rotatably fitted on the outer side of the fixed ball (15). The inner side of the second rotating block (9) is threadedly connected to the outer side of the threaded tube (10). The bottom of the threaded tube (10) is provided with a locking mechanism. The locking mechanism acts between the rotating ball (16) and the fixed ball (15) to realize the relative locking of the rotating ball (16) and the fixed ball (15).

2. The minimally invasive nerve protection and decompression device for spinal stenosis according to claim 1, characterized in that: The hook (7) is made of polyethylene. The top outer side of the first rotating block (3) is provided with a scale strip, which is used to precisely adjust the position of the hook (7). The upper and lower outer sides of the second rotating block (9) are fixed with a matching rotating ball (91), which is slidably disposed on the inner side of the fixed cylinder (1) and the connecting block (2).

3. The minimally invasive neuroprotective decompression device for spinal stenosis according to claim 1, characterized in that: The adjustment mechanism includes a threaded rod (4) fixed at the center of the first rotating block (3). The outer side of the threaded rod (4) is rotatably disposed on the inner side of the connecting block (2). The bottom outer side of the threaded rod (4) is threadedly connected to the inner side of the moving block (5). The outer side of the moving block (5) is slidably disposed on the inner side of the guide block (6). The bottom of the moving block (5) is fixed to the top side of the hook (7).

4. The minimally invasive nerve protection and decompression device for spinal stenosis according to claim 3, characterized in that: The sidewall of the guide block (6) is fixed to the outer surface of the fixed cylinder (1). The movable block (5) forms a sliding structure with the inner side of the guide block (6) through the threaded rod (4). The sliding structure is used to limit the rotation of the movable block (5) and guide it to move along the axial direction of the guide block (6).

5. The minimally invasive neuroprotective decompression device for spinal stenosis according to claim 1, characterized in that: The locking mechanism includes an arc-shaped ball (11) fixed to the bottom of the threaded tube (10). The outer side of the lower end of the arc-shaped ball (11) is attached to the outer side of two sets of locking blocks (13). The outer side of the locking block (13) extends out of the inner side of the rotating ball (16) and is adapted to the inner wall of the fixed ball (15). The outer side of the locking block (13) is fixedly connected to one end of the return spring (14), and the other end of the return spring (14) is fixed to the inner wall of the rotating ball (16).

6. The minimally invasive neuroprotective decompression device for spinal stenosis according to claim 5, characterized in that: The outer side of the fixed sphere (15) is rotatably arranged on the inner side of the rotating sphere (16), the two sets of locking blocks (13) move in opposite directions, and the two sets of locking blocks (13) are symmetrically distributed about the axis of the threaded tube (10).

7. The minimally invasive nerve protection and decompression device for spinal stenosis according to claim 5, characterized in that: The arc-shaped ball (11) has a mating groove (12) on the side near the locking block (13). The inner dimension of the mating groove (12) matches the outer dimension of the locking block (13). The mating groove (12) is used to engage with the locking block (13) when the arc-shaped ball (11) moves down to enhance locking stability.

8. The minimally invasive neuroprotective decompression device for spinal stenosis according to claim 1, characterized in that: The fixed cylinder (1) has a limiting block inside. The limiting block is sleeved on the outside of the threaded tube (10). The limiting block is used to restrict the radial movement of the threaded tube (10) and only allows the threaded tube (10) to move up and down along the axial direction of the fixed cylinder (1).

9. The minimally invasive neuroprotective decompression device for spinal stenosis according to claim 5, characterized in that: The inside of the threaded tube (10) is through-hole, and a cleaning tube (17) is inserted inside the threaded tube (10). The bottom of the cleaning tube (17) passes through the inside of the arc-shaped ball (11), the fixed ball (15) and the rotating ball (16) in sequence. The bottom end of the rotating ball (16) is provided with a through hole (18). The bottom end of the rotating ball (16) is connected to a one-way nozzle (19). The one-way nozzle (19) is located on the outer side of the upper end of the fixed long needle (8). The one-way nozzle (19) is used to spray cleaning fluid into the surgical area.

10. The minimally invasive neuroprotective decompression device for spinal stenosis according to claim 9, characterized in that: The cleaning tube (17) is made of flexible hose. A groove is provided on the inner side of the upper end of the cleaning tube (17) near the rotating ball (16), and the groove is in the same position as the through hole (18). The groove is used to adapt to the rotation of the rotating ball (16) so as to avoid the cleaning tube (17) from being damaged or blocked due to the adjustment of the angle of the rotating ball (16).

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