Adjustable traction support for neurosurgery operation

Abstract

The invention discloses an adjustable traction support for neurosurgery. The adjustable traction support comprises positioning anti-falling devices installed on the front side and the rear side of a surgical sickbed. An adjusting platform is arranged above the top surface of the surgical sickbed; main positioning toothed plates are fixedly mounted in the symmetrically mounted bearing brackets; main bidirectional threaded rods are rotationally arranged in the symmetrically arranged positioning anti-falling devices through bearings; positioning transverse plates are slidably arranged on the left side and the right side of the lower portion of the adjusting platform. According to the adjustable traction bracket for the neurosurgery operation, the bearing bracket and the positioning anti-falling device are adjusted and matched according to sickbeds of different specifications through the adjusting platform, so that falling in the subsequent working process is prevented, and the stability of the bearing bracket and the adjusting platform is improved; and slippage is prevented in the retraction process through the retraction bracket and the anti-falling side plate which is elastically connected with the inner side of the retraction bracket, so that subsequent treatment work is facilitated.

Description

Technical Field

[0001] This invention relates to the field of neurosurgical technology, specifically to an adjustable retraction stent for neurosurgical procedures. Background Technology

[0002] Neurosurgery is a branch of surgery. It is based on surgery as the main treatment method in surgery, and applies unique neurosurgical research methods. In clinical neurosurgery, the skin needs to be pulled open and supported to facilitate diagnosis and treatment by medical staff.

[0003] Publication number CN213606580U discloses a retraction stent for clinical neurosurgical procedures. By rotating the third connecting shaft, the retraction rod connected to the third connecting shaft can retract the skin at the surgical site of the patient. Through the retraction rod, the third connecting shaft, the first connecting shaft, and the threaded rod, the retraction stent can retract the surgical site of the patient while adjusting the angle of the retraction stent.

[0004] Publication number CN215227982U discloses a retractor for neurosurgical clinical surgery. The bottom ends of the second and third fixing bars are both rotatably provided with a fourth fixing bar. The fourth fixing bar is provided with a pair of symmetrical first retraction mechanisms. This invention can be effectively applied to different retraction sites and tissues, and can perform retraction operations on secondary tissues within the retracted tissue, reducing the impact of adding a retractor on the surgeon's operation.

[0005] However, the aforementioned retraction frame used in neurosurgery still has the following problems in actual use: the retractor is installed by a support frame installed on one side of the bed, but after the skin of the body is cut open during the operation, it needs to be limited by the traction force on both sides. However, the retractor that works on one side only has the limiting force on one side, which makes it easy to tilt when retracting the body tissue. At the same time, the smooth retractor is prone to slipping when retracting the body tissue due to the large amount of blood and flesh, which can easily cause secondary damage to the body tissue.

[0006] Therefore, we propose an adjustable retraction stent for neurosurgery to address the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide an adjustable retraction stent for neurosurgery, which solves the problem of the current technology where a single-sided support frame drives the upper retractor for installation. However, after the skin is opened during surgery, it needs to be limited by traction forces from both sides. A single-sided retractor only has unilateral limiting force, which can easily cause tilting when retracting body tissue. At the same time, a smooth retractor is prone to slipping when retracting body tissue due to the large amount of blood and flesh, which can easily cause secondary damage to the body tissue.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an adjustable retraction stent for neurosurgery, comprising positioning and anti-dislodgement devices installed on the front and rear sides of the surgical bed, and a load-bearing bracket fixedly installed on the top center of the positioning and anti-dislodgement devices on both the front and rear sides;

[0009] The surgical bed is equipped with an adjustment platform above its top surface, and an adjustment knob is rotatably mounted at the center of the top surface of the adjustment platform; it also includes:

[0010] The symmetrically installed support brackets are all fixedly installed with main positioning tooth plates inside, and the top surfaces of the symmetrically arranged support brackets are all slidably connected to the bottom surface of the adjustment platform.

[0011] Among them, the symmetrically arranged positioning anti-detachment devices are all equipped with main bidirectional threaded rods that rotate through bearings, and the left and right sides of the symmetrically arranged main bidirectional threaded rods are threaded to the middle of the guide slider.

[0012] The adjustment platform has slidably mounted positioning plates on both the left and right sides below it, and unlocking sliders are slidably mounted on the inner side of the top surface of the positioning plates on both sides. The symmetrically mounted unlocking sliders are connected to the inner wall of the positioning plates by limiting springs.

[0013] Preferably, the symmetrically arranged positioning anti-detachment devices are symmetrically distributed about the transverse central axis of the surgical bed, and positioning anti-detachment plates are slidably arranged on both the upper and lower sides of the symmetrically arranged positioning anti-detachment devices, and the symmetrically arranged positioning anti-detachment plates are clamped and connected to the upper and lower sides of the surgical bed.

[0014] Preferably, the positioning anti-detachment device has symmetrically arranged counteracting flip rods on its upper and lower sides, and the inner ends of the symmetrically arranged counteracting flip rods are all hinged to the outer wall of the guide slider, and the outer ends of the symmetrically arranged counteracting flip rods are all hinged to the inner end of the positioning anti-detachment plate.

[0015] Preferably, a drive gear is rotatably arranged at the center of the adjustment platform, and driven racks are slidably arranged on both the left and right sides of the adjustment platform. The symmetrically arranged driven racks are meshed with the outer wall of the drive gear. The top of the drive gear is fixedly connected to the bottom of the adjustment knob, and the outer ends of the driven racks on both sides are fixedly connected to the top of the support bracket.

[0016] Preferably, the outer ends of the symmetrically arranged positioning transverse plates are slidably connected to the middle of the secondary positioning toothed plate, and the left and right ends of the symmetrically arranged secondary positioning toothed plates are connected to the inner wall of the positioning transverse plate by guide springs, and the outer ends of the symmetrically arranged secondary positioning toothed plates are engaged with the inner wall of the main positioning toothed plate inside the bearing bracket.

[0017] Preferably, the symmetrically arranged positioning horizontal plates, secondary positioning tooth plates, and unlocking sliders are distributed in a one-to-one correspondence, and the inner wall of the symmetrically arranged secondary positioning tooth plates and the outer wall of the unlocking sliders are connected to each other by a traction rope. After the secondary positioning tooth plates are moved by the unlocking slider through the traction rope, they can be disengaged from the main positioning tooth plates.

[0018] Preferably, a drive plate is slidably disposed below the adjustment platform, and the top left and right sides of the drive plate are slidably engaged with the bottom end of the drive slider. The top ends of the left and right drive sliders are respectively fixedly connected to the inner side of the top surface of the left and right positioning plates. Moreover, the interior of the drive plate is provided with a secondary bidirectional threaded rod through bearings.

[0019] Preferably, the bottom left and right sides of the drive plate are slidably connected to the top of the pull-out bracket, and the top of the pull-out bracket on both sides is threadedly connected to the outer wall of the inner secondary bidirectional threaded rod of the drive plate.

[0020] Preferably, positioning side plates are fixedly installed on both the upper and lower sides of the outer end of the symmetrically installed pull-out bracket, and anti-detachment side plates are slidably provided on the inner ends of the upper and lower positioning side plates, and the upper and lower ends of the symmetrically arranged anti-detachment side plates are connected to the inner ends of the positioning side plates by reset springs.

[0021] Compared with the prior art, the beneficial effects of this invention are: This adjustable retraction stent for neurosurgery, through an adjustment platform, allows for the adaptation of the support stent and positioning anti-dislodgement device to different sizes of hospital beds, thereby preventing dislodgement during subsequent procedures, improving the stability of the support stent and adjustment platform, and preventing slippage during retraction through the anti-dislodgement side plate elastically connected to the inner side of the retraction stent, facilitating subsequent treatment. The specific details are as follows:

[0022] 1. The adjustment knob on the top of the rotating adjustment platform drives the internal drive gear to rotate, which in turn drives the driven racks on the left and right sides and the support brackets fixedly connected to them to slide. The support brackets drive the positioning anti-dislodgement device fixedly connected to the bottom to change the distance between them, thereby allowing the support brackets and positioning anti-dislodgement devices on the front and rear sides to be adjusted according to the different widths of the surgical bed.

[0023] 2. The main bidirectional threaded rod inside the rotary positioning anti-detachment device drives the guide slider to slide outward, so that the abutting flipping rod, which is hinged to the outside of the guide slider, is limited by the positioning anti-detachment plate, thereby driving the positioning anti-detachment plates on the upper and lower sides to slide outward, and then the positioning anti-detachment device is attached to the outer wall of the surgical bed, and clamped on the upper and lower sides of the surgical bed under the action of the spring on the inner side of the positioning anti-detachment plate.

[0024] 3. Unlock the slider and slide the traction rope and the secondary positioning tooth plate inward to disengage it from the main positioning tooth plate inside the support bracket. Then, manually support the positioning plate and drive plate to raise and lower them. Under the extension of the guide spring inside the positioning plate, the secondary positioning tooth plate moves outward and re-engages with the main positioning tooth plate.

[0025] 4. Traction is achieved through positioning side plates or anti-detachment side plates connected by guide springs, maximizing the traction and positioning of different tissues in the body. The manual rotation drives the secondary bidirectional threaded rod inside the horizontal plate to rotate, causing the secondary bidirectional threaded rod to drive the traction brackets connected to the left and right sides to pull the body tissues outward together. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the installation structure of the adjustment platform of the present invention;

[0028] Figure 3 This is a schematic diagram of the top cross-sectional structure of the adjustment platform of the present invention;

[0029] Figure 4 This is a schematic diagram of the front cross-sectional structure of the positioning and anti-detachment device of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the positioning anti-detachment plate after it has been moved according to the present invention;

[0031] Figure 6 This is a schematic diagram of the connection between the support bracket and the guide rack of the present invention;

[0032] Figure 7 This is a schematic diagram of the three-dimensional structure of the positioning plate of the present invention;

[0033] Figure 8For the present invention Figure 7 Enlarged structural diagram at point A in the middle;

[0034] Figure 9 This is a schematic diagram of the three-dimensional structure of the traction support of the present invention;

[0035] Figure 10 This is a schematic diagram of the anti-detachment side plate installation structure of the present invention.

[0036] In the diagram: 1. Surgical bed; 2. Positioning anti-detachment device; 3. Support bracket; 4. Adjustment platform; 5. Adjustment knob; 6. Main positioning toothed plate; 7. Main bidirectional threaded rod; 8. Guide slider; 9. Positioning cross plate; 10. Unlocking slider; 11. Limiting spring; 12. Positioning anti-detachment plate; 13. Anti-flipping rod; 14. Driving gear; 15. Driven rack; 16. Secondary positioning toothed plate; 17. Guide spring; 18. Drive cross plate; 19. Drive slider; 20. Secondary bidirectional threaded rod; 21. Return spring; 22. Retraction bracket; 23. Positioning side plate; 24. Anti-detachment side plate; 25. Traction rope. Detailed Implementation

[0037] 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.

[0038] Please see Figures 1-10 This invention provides a technical solution: an adjustable retraction stent for neurosurgery, comprising positioning and anti-dislodgement devices 2 installed on the front and rear sides of a surgical bed 1; wherein, the interior of each of the symmetrically arranged positioning and anti-dislodgement devices 2 is rotatably provided with a main bidirectional threaded rod 7 via bearings, and the left and right sides of the symmetrically arranged main bidirectional threaded rod 7 are threadedly connected to the middle of a guide slider 8; positioning and anti-dislodgement plates 12 are slidably arranged on the upper and lower sides of each of the symmetrically arranged positioning and anti-dislodgement devices 2, and the symmetrically arranged positioning and anti-dislodgement plates 12 are clamped and connected to the upper and lower sides of the surgical bed 1; the interior of each of the symmetrically arranged positioning and anti-dislodgement devices 2 is rotatably provided with abutment and flipping rods 13 in a left-right symmetrical manner, and the inner ends of each of the symmetrically arranged abutment and flipping rods 13 are hinged to the outer wall of the guide slider 8, and the outer ends of each of the symmetrically arranged abutment and flipping rods 13 are hinged to the inner ends of the positioning and anti-dislodgement plates 12; Figure 2 , 4As shown in Figure 5, the main bidirectional threaded rod 7 inside the rotary positioning anti-detachment device 2 drives the guide slider 8 to slide outward, so that the abutting flip rod 13, which is hinged to the outside of the guide slider 8, is limited by the positioning anti-detachment plate 12, thereby driving the positioning anti-detachment plates 12 on both the upper and lower sides to slide outward, and then the positioning anti-detachment device 2 is attached to the outer wall of the surgical bed 1, and clamped on the upper and lower sides of the surgical bed 1 under the action of the spring on the inner side of the positioning anti-detachment plate 12.

[0039] A support bracket 3 is fixedly installed in the center of the top surface of the positioning anti-detachment device 2; an adjustment platform 4 is provided above the top surface of the surgical bed 1, and an adjustment knob 5 is rotatably installed at the center of the top surface of the adjustment platform 4; an active gear 14 is rotatably installed at the center of the interior of the adjustment platform 4, and driven racks 15 are slidably installed on both the left and right sides of the interior of the adjustment platform 4, and the symmetrically arranged driven racks 15 are meshed with the outer wall of the active gear 14, and the top of the active gear 14 is fixedly connected to the bottom of the adjustment knob 5, and the outer ends of the driven racks 15 on both sides are fixedly connected to the top of the support bracket 3; Figure 1-2 As shown in Figures 6 and 7, the adjustment knob 5 on the top surface of the rotating adjustment platform 4 drives the internal drive gear 14 to rotate, which in turn drives the driven rack 15 meshing with the left and right sides and the bearing bracket 3 fixedly connected to it to slide. The bearing bracket 3 drives the positioning anti-detachment device 2 fixedly connected to the bottom to change the distance between them.

[0040] The symmetrically installed support brackets 3 each have a main positioning tooth plate 6 fixedly installed inside, and the top surfaces of the symmetrically arranged support brackets 3 are slidably connected to the bottom surface of the adjustment platform 4. Positioning horizontal plates 9 are slidably arranged on the left and right sides below the adjustment platform 4, and unlocking sliders 10 are slidably arranged on the inner side of the top surface of the left and right side positioning horizontal plates 9. The symmetrically arranged unlocking sliders 10 are connected to the inner walls of the positioning horizontal plates 9 by limiting springs 11. The outer ends of the symmetrically arranged positioning horizontal plates 9 are slidably connected to the middle of the secondary positioning tooth plate 16, and the left and right ends of the symmetrically arranged secondary positioning tooth plates 16 are connected to the inner walls of the positioning horizontal plates 9 by guide springs 17. The outer ends of the symmetrically arranged secondary positioning tooth plates 16 are engaged with the inner walls of the main positioning tooth plate 6 inside the support bracket 3. The inner walls of the secondary positioning tooth plates 16 and the outer walls of the unlocking sliders 10 are connected by traction ropes 25. Figure 2 , 7 As shown in Figure 8, the unlocking slider 10, which is located inside the positioning horizontal plate 9, is manually slid inward, so that the unlocking slider 10 moves the limiting spring 11 and the traction rope 25 together. The traction rope 25 then drives the outer end of the auxiliary positioning tooth plate 16 to slide inward, so that it disengages from the main positioning tooth plate 6 inside the bearing bracket 3. Then, the positioning horizontal plate 9 and the driving horizontal plate 18 are manually supported to raise and lower.

[0041] A drive plate 18 is slidably mounted below the adjustment platform 4. The top left and right sides of the drive plate 18 are slidably engaged with the bottom of the drive slider 19. The tops of the left and right drive sliders 19 are respectively fixedly connected to the inner sides of the top surfaces of the left and right positioning plates 9. A secondary double-threaded rod 20 is rotatably mounted inside the drive plate 18 via bearings. The bottom left and right sides of the drive plate 18 are slidably connected to the top of the pull-out bracket 22. The tops of the left and right pull-out brackets 22 are threadedly connected to the outer wall of the secondary double-threaded rod 20 inside the drive plate 18. Positioning side plates 23 are fixedly mounted on the upper and lower sides of the symmetrically installed pull-out brackets 22. Anti-detachment side plates 24 are slidably mounted on the inner ends of the upper and lower positioning side plates 23. The upper and lower ends of the symmetrically installed anti-detachment side plates 24 are connected to the inner ends of the positioning side plates 23 via return springs 21. Figure 2 , 9 As shown in -10, traction is achieved through the positioning side plate 23 or the anti-detachment side plate 24 connected by the guide spring 17, which can adapt to the traction and positioning of different tissues in the body to the greatest extent. The manual rotation drives the secondary bidirectional threaded rod 20 inside the horizontal plate 18 to rotate, so that the secondary bidirectional threaded rod 20 drives the traction bracket 22 connected by threads on the left and right sides to slide outward.

[0042] Working principle: Before using this adjustable retraction stent for neurosurgery, it is necessary to check the overall condition of the device to ensure it can function properly. Figure 1 - Figure 10 As shown, rotating the adjustment knob 5 drives the driving gear 14, the driven rack 15, and the support bracket 3 fixedly connected to it to slide, and the support bracket 3 drives the positioning anti-detachment device 2 fixedly connected to the bottom to change the distance between them, so that the support bracket 3 and the positioning anti-detachment device 2 on the front and rear sides can be adjusted according to the different widths of the surgical bed.

[0043] The main bidirectional threaded rod 7 inside the rotary positioning anti-detachment device 2 drives the guide slider 8 to slide outward, which causes the anti-flipping rod 13 to drive the positioning anti-detachment plate 12 to slide outward, and under the action of the spring on the inner side of the positioning anti-detachment plate 12, it is clamped on the upper and lower sides of the surgical bed 1, thereby preventing it from falling off during subsequent work and improving the stability of the support bracket 3 and the adjustment platform 4.

[0044] Slide the unlocking slider 10 inward to move the limiting spring 11 and the traction rope 25 together. The traction rope 25 then moves the outer sub-positioning tooth plate 16 inward. Then, manually support the positioning horizontal plate 9 and the driving horizontal plate 18 to raise and lower them. Under the extension of the guide spring 17 inside the positioning horizontal plate 9, the sub-positioning tooth plate 16 moves outward to re-engage with the main positioning tooth plate 6, thereby positioning the positioning horizontal plate 9, the driving horizontal plate 18, and the pull-out bracket 22.

[0045] The traction force required for different tissues can be applied through the positioning side plate 23 or the anti-dislodgement side plate 24 connected by the guide spring 17, so as to maximize the traction and positioning of different tissues in the body. The auxiliary bidirectional threaded rod 20 inside the horizontal plate 18 is rotated by human rotation, so that the auxiliary bidirectional threaded rod 20 drives the traction bracket 22 connected by threads on the left and right sides to slide outward, thereby pulling the opposing body tissues outward together to facilitate subsequent treatment.

[0046] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] 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. An adjustable retraction stent for neurosurgery, comprising positioning anti-dislodgement devices (2) installed on the front and back sides of a surgical bed (1), and a load-bearing stent (3) is fixedly installed on the top center of the positioning anti-dislodgement devices (2) on both the front and back sides; An adjustment platform (4) is provided above the top surface of the surgical bed (1), and an adjustment knob (5) is rotatably provided at the center of the top surface of the adjustment platform (4). Its features are, Also includes: The main positioning tooth plate (6) is fixedly installed inside each of the symmetrically installed support brackets (3), and the top surface of each of the symmetrically arranged support brackets (3) is slidably connected to the bottom surface of the adjustment platform (4). Among them, the symmetrically arranged positioning anti-detachment device (2) has a main bidirectional threaded rod (7) inside which is rotated through bearings, and the left and right sides of the symmetrically arranged main bidirectional threaded rod (7) are threaded to the middle of the guide slider (8). The adjustment platform (4) has a positioning plate (9) slidably installed on both the left and right sides below it, and an unlocking slider (10) is slidably installed on the inner side of the top surface of the positioning plate (9) on both the left and right sides. The unlocking slider (10) and the inner wall of the positioning plate (9) are connected to each other by a limiting spring (11).

2. The adjustable retraction stent for neurosurgery according to claim 1, characterized in that: The symmetrically arranged positioning anti-detachment devices (2) are symmetrically distributed about the transverse central axis of the surgical bed (1), and the symmetrically arranged positioning anti-detachment devices (2) are slidably arranged with positioning anti-detachment plates (12) on both the upper and lower sides, and the symmetrically arranged positioning anti-detachment plates (12) are clamped and connected to the upper and lower sides of the surgical bed (1).

3. The adjustable retraction stent for neurosurgery according to claim 1, characterized in that: The positioning anti-detachment device (2) has symmetrically arranged anti-collision flipping rods (13) on its upper and lower sides. The inner ends of the symmetrically arranged anti-collision flipping rods (13) are all hinged to the outer wall of the guide slider (8), and the outer ends of the symmetrically arranged anti-collision flipping rods (13) are all hinged to the inner end of the positioning anti-detachment plate (12).

4. The adjustable retraction stent for neurosurgery according to claim 1, characterized in that: The adjustment platform (4) has a drive gear (14) rotatably mounted at its center, and driven racks (15) are slidably mounted on both the left and right sides of the adjustment platform (4). The driven racks (15) are symmetrically mounted and meshed with the outer wall of the drive gear (14). The top of the drive gear (14) is fixedly mounted to the bottom of the adjustment knob (5), and the outer ends of the driven racks (15) on both the left and right sides are fixedly mounted to the top of the support bracket (3).

5. The adjustable retraction stent for neurosurgery according to claim 1, characterized in that: The outer ends of the symmetrically arranged positioning transverse plates (9) are slidably connected to the middle of the secondary positioning toothed plate (16), and the left and right ends of the symmetrically arranged secondary positioning toothed plates (16) are connected to the inner wall of the positioning transverse plates (9) by guide springs (17). The outer ends of the symmetrically arranged secondary positioning toothed plates (16) are engaged with the inner wall of the main positioning toothed plate (6) inside the bearing bracket (3).

6. The adjustable retraction stent for neurosurgery according to claim 5, characterized in that: The symmetrically arranged positioning horizontal plate (9), the secondary positioning toothed plate (16), and the unlocking slider (10) are distributed in a one-to-one correspondence. The inner wall of the symmetrically arranged secondary positioning toothed plate (16) and the outer wall of the unlocking slider (10) are connected to each other by a traction rope (25). After the unlocking slider (10) drives the secondary positioning toothed plate (16) through the traction rope (25), it can disengage from the main positioning toothed plate (6).

7. The adjustable retraction stent for neurosurgery according to claim 1, characterized in that: A drive plate (18) is slidably arranged below the adjustment platform (4), and the top surface of the drive plate (18) is slidably engaged with the bottom end of the drive slider (19) on both the left and right sides. The top ends of the left and right drive sliders (19) are respectively fixedly connected to the inner side of the top surface of the left and right positioning plates (9). Furthermore, the drive plate (18) is equipped with a secondary bidirectional threaded rod (20) through a bearing.

8. The adjustable retraction stent for neurosurgery according to claim 7, characterized in that: The bottom surface of the drive plate (18) is slidably connected to the top of the pull-out bracket (22) on both the left and right sides, and the top of the pull-out bracket (22) on both the left and right sides is threaded to the outer wall of the secondary bidirectional threaded rod (20) inside the drive plate (18).

9. An adjustable retraction stent for neurosurgery according to claim 8, characterized in that: The outer ends of the symmetrically installed pull-out bracket (22) are fixedly installed with positioning side plates (23) on both the upper and lower sides. The inner ends of the positioning side plates (23) on both the upper and lower sides are slidably provided with anti-detachment side plates (24). The upper and lower ends of the symmetrically arranged anti-detachment side plates (24) are connected to the inner ends of the positioning side plates (23) by a reset spring (21).

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