Dura mater retraction device under spine endoscope

Abstract

The invention relates to the field of medical auxiliary instruments, in particular to a spinal endoscopic dura mater retraction device which comprises a puncture component, and the puncture component is used for percutaneous puncture to the position close to a spinal canal dura mater; a suspension part is arranged in the puncture part, and the suspension part is used for extending out of the puncture part and being connected with the cut edge of the dura mater. An operation part is further arranged on the puncture part, and the operation part is used for adjusting the retraction force applied to the dural mater by the suspension part; by controlling the operation part, the suspension part is fixed and retracts the dura mater to expose the spinal cord tissue. Through the integration of puncture, suspension and operation components, the traction of the dura mater under the minimally invasive condition of the spine endoscope is realized.

Description

Technical Field

[0001] This invention relates to the field of medical assistive devices, specifically to a spinal endoscopy dura mater retraction device. Background Technology

[0002] In minimally invasive spinal endoscopic surgery, with the advancement of technology, an increasing number of lesions within the spinal canal are being treated endoscopically. As a core technology in minimally invasive spinal surgery, spinal endoscopy, with its advantages of minimal trauma, rapid recovery, and high precision, has become an important treatment method for spinal diseases such as lumbar disc herniation, spinal stenosis, ossification of the ligamentum flavum, and subdural tumors or adhesions. Its core lies in establishing a working channel through a tiny incision, utilizing the magnified field of vision provided by the endoscopic system to perform procedures such as lesion resection and nerve decompression, minimizing damage to the normal anatomical structure of the spine.

[0003] However, in spinal endoscopic surgeries involving the dura mater region, such as spinal canal tumor resection and dural adhesion release, ensuring safe and adequate exposure of the surgical field remains a clinical challenge. The dura mater is a connective tissue membrane that surrounds the spinal cord. Its surrounding space is limited and it is adjacent to critical structures such as the spinal cord and nerve roots, resulting in a low margin for error. In traditional surgery, surgeons expose the surgical field by incising the dura mater or using large retractors. However, this method is highly invasive, easily damages the spinal cord and nerve roots, and may lead to complications such as cerebrospinal fluid leakage and infection, contradicting the principles of minimally invasive surgery.

[0004] Furthermore, existing spinal endoscopic retraction instruments mostly focus on retracting nerve roots or soft tissues, with a lack of dedicated retraction devices for the dura mater. While some multifunctional retractors possess a certain tissue traction capacity, they generally suffer from complex structures and cumbersome operation, making them difficult to adjust flexibly within the limited space of a single-channel endoscope. Moreover, most instruments lack anchoring mechanisms, failing to maintain the dura mater in a retracted state for extended periods, increasing the difficulty and risk of surgical procedures.

[0005] Therefore, this invention proposes a spinal endoscopy dura mater retraction device that meets the requirements of minimally invasive operation while achieving precise and stable retraction of the dura mater. It fully exposes the surgical field while ensuring the safety of the spinal cord and nerve structures, thus expanding the application of spinal endoscopy technology in the treatment of complex spinal diseases. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a spinal endoscopic dura mater retraction device, which integrates puncture, suspension, and operating components to achieve dura mater retraction under minimally invasive spinal endoscopic conditions.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a spinal endoscopic dura mater retraction device, comprising a puncture component for percutaneous puncture to the vicinity of the dura mater within the spinal canal; a suspension component is provided within the puncture component for extending out of the puncture component and connecting to the cut edge of the dura mater.

[0008] The puncture device is also equipped with an operating component, which is used to adjust the traction force applied to the dura mater by the suspension component; by controlling the operating component, the suspension component is fixed and the dura mater is pulled apart to expose the spinal cord tissue.

[0009] The technical principles of the above solution are as follows:

[0010] An operating channel is established via percutaneous puncture. Once the puncture device reaches the vicinity of the dura mater within the spinal canal, the built-in suspension device is released, anchoring it to the edge of the incised dura mater. Using the operating components on the puncture device, the traction force of the suspension device can be adjusted, thereby opening the dura mater and fully exposing the underlying spinal cord tissue. This provides a clear surgical field for delicate procedures under spinal endoscopy (such as tumor resection and adhesion release), while the controllable components reduce the risk of damage to the dura mater and spinal cord.

[0011] The above approach has the following beneficial effects:

[0012] 1. This approach integrates puncture, suspension, and manipulation components to achieve dura mater retraction under minimally invasive endoscopic conditions. Traditional methods often rely on enlarged incisions or instruments to compress the dura mater, which can easily cause nerve irritation or tearing. This device, however, uses a small local incision in the dura mater to anchor the edges of the suspension component and apply controllable traction, avoiding spinal cord compression and maintaining the stability of the surgical field. This design enhances the safety margin of the procedure and is suitable for complex cases with spinal stenosis, severe adhesions, or proximity to important neural structures, while reducing the risk of postoperative complications such as cerebrospinal fluid leakage and neurological dysfunction.

[0013] 2. This approach allows surgeons to adjust the retraction force by setting adjustable operating components; it also allows for adjustments to the suspension state based on endoscopic feedback during the procedure to optimize exposure; the anchoring design between the suspension components and the edge of the dura mater is more stable, maintaining continuous and stable retraction of the dura mater during prolonged surgery, preventing repeated adjustments due to poor surgical field exposure, reducing repeated stimulation of the spinal cord tissue, and improving the smoothness and controllability of the surgery.

[0014] 3. This approach employs a percutaneous puncture path and modular structural design, balancing minimally invasive principles with clinical practicality. It reduces the need for large incisions or extensive soft tissue dissection, preserving spinal stability and the integrity of surrounding anatomical structures. Furthermore, the puncture, suspension, and manipulation components have clearly defined functions and a compact structure, facilitating rapid deployment and removal during the procedure, thus shortening operation time. This design not only reduces surgical trauma and patient recovery burden but also provides a new technical means for endoscopic treatment of deep lesions within the spinal canal, expanding the scope of application for spinal endoscopic surgery.

[0015] Furthermore, the puncture component is a puncture needle, and the outer wall of the puncture needle is symmetrically and detachably connected with puncture buckles; the bottom of the puncture needle is slanted and pointed.

[0016] Beneficial effects: The puncture needle has a slanted and sharp base, which facilitates puncture and reduces tissue damage; the puncture buckle on the outer wall can be used with the endoscope working channel or external fixation structure to limit the puncture depth and stabilize the position, prevent intraoperative displacement, and improve the safety and positioning accuracy of the operation.

[0017] Furthermore, the suspension component is a traction structure, which includes a spring core threaded into the inner wall of the puncture needle, and a first spring fixedly connected to the bottom of the spring core; the end of the first spring away from the spring core is pointed, and the outer wall of the spring core can also be detachably connected to a core buckle.

[0018] Beneficial effects: The suspension component adopts a combination structure of spring core and first spring, which combines flexibility and support. The sharp end is easy to anchor to the edge of the dura mater. The spring core cooperates with the inner wall of the puncture needle through threads to achieve advancement and stable positioning. With the inner core buckle, the traction position can be locked to prevent retraction or loosening, thereby providing controllable, continuous and safe traction force and reducing the risk of dura mater tear or spinal cord injury.

[0019] Furthermore, the operating components are a puncture handle and an inner core handle. The puncture handle is fixedly connected to the top of the puncture needle, and the inner core handle is fixedly connected to the top of the spring inner core.

[0020] Beneficial effects: The operating components adopt a split puncture handle and inner core handle design, which control the movement of the puncture needle and the spring inner core respectively, realizing the coordination of puncture positioning and suspension traction; the operator can flexibly adjust the dura mater retraction force and position. The structure is simple and easy to use in narrow endoscopic channels, improving surgical efficiency and reducing the risk of operation error.

[0021] Furthermore, the puncture component is a puncture cannula; the suspension component is a clamp structure, which includes a suspension rod that slides with the inner wall of the puncture cannula, a base is fixedly connected to the bottom of the suspension rod, and a clamp jaw is hinged on the base.

[0022] The operating component is a handle that is fixedly connected to the puncture cannula; the handle is equipped with a moving mechanism for sliding the suspension bar and a suction mechanism for adsorbing the edge of the dura mater; the moving mechanism is used to drive the suction mechanism to operate synchronously so that the dura mater is adsorbed onto the jaws when the jaws move to the target area.

[0023] Beneficial effects: The combined action of clamps and suction enables the grasping and retraction of the edge of the dura mater; the handle integrates the movement and suction mechanism, making operation simple, avoiding slippage or excessive traction, improving the reliability and safety of retraction, and reducing the risk of nerve tissue damage.

[0024] Furthermore, the moving mechanism includes a slide rail fixedly connected to the inner wall of the handle, a slider slidably fitted on the slide rail, and the slider being fixedly connected to the end of the suspension rod away from the jaws; a locking rod is slidably fitted inside the slider, and a second spring is fixedly connected to the outer wall of the locking rod, with the end of the second spring away from the locking rod being fixedly connected to the inner wall of the slider; and several slots are opened on the slide rail to engage with the locking rod.

[0025] The slider is also equipped with an opening and closing mechanism for driving the jaws to open and close; the inner wall of the jaws is also equipped with a bonding mechanism for bonding the edge of the dura mater; the opening and closing mechanism is used to drive the bonding mechanism to operate synchronously, so that the bonding mechanism can bond the edge of the dura mater synchronously when the jaws are closed.

[0026] Beneficial effects: The suspension rod is positioned and locked by the cooperation of the slide rail, slider and clamping rod, ensuring the stability of the pull-out position; the opening and closing mechanism and the bonding mechanism are linked, so that the jaws can be bonded to the edge of the dura mater at the same time when they close, which enhances the gripping force and reduces local stress concentration, preventing slippage or damage.

[0027] Furthermore, the suction mechanism includes a suction cylinder fixedly connected to the inner wall of the handle, and a piston plate slidably fitted on the inner wall of the suction cylinder; a transmission rod is fixedly connected to the outer wall of the slider, and the end of the transmission rod away from the slider is fixedly connected to the piston plate; a suction tube is connected to the side of the suction cylinder away from the transmission rod, and the end of the suction tube away from the suction cylinder is connected to the side of the suspension rod near the jaws.

[0028] Beneficial effects: The piston plate is driven to slide inside the suction cylinder by the movement of the slider, realizing the automatic establishment and release of negative pressure without the need for an additional power source; the suction tube transmits negative pressure to the vicinity of the jaws, and when the jaws reach the target position, they adsorb the edge of the dura mater, assisting in clamping and positioning, and improving gripping stability.

[0029] Furthermore, the opening and closing mechanism includes a knob that is rotatably fitted on the slider, a pull wire that is fixedly connected to the outer wall of the knob's rotation shaft, and a torsion spring that is sleeved on the hinge shaft between the jaws and the base; the end of the pull wire away from the knob is fixedly connected to the hinge shaft on the jaws.

[0030] Beneficial effects: The lever pulls the cable and a torsion spring to achieve smooth opening and closing of the jaws, making operation easy and responsive; the lever is located on the slider, and the return force of the torsion spring ensures that the jaws apply clamping force to the edge of the dura mater when closed, avoiding excessive squeezing or pinching, thus improving safety and reliability.

[0031] Furthermore, the bonding mechanism includes a bonding layer fixedly connected to the inner wall of the jaws, and a transmission cylinder fixedly connected to the inner wall of the handle. A movable plate is slidably fitted to the inner wall of the transmission cylinder. The movable plate is fixedly connected to the pull wire. A transmission tube is connected to the side of the transmission cylinder near the bonding layer, and the end of the transmission tube away from the transmission cylinder is connected to the interior of the bonding layer.

[0032] Beneficial effects: The movable plate slides within the transmission cylinder via a pull-wire linkage, and the material is transmitted to the bonding layer through the transmission tube, allowing it to quickly fill and adhere to the edge of the rigid diaphragm when the jaws close. This design can disperse clamping stress, avoid localized pressure damage, and enhance gripping stability.

[0033] Furthermore, the outer wall of the puncture cannula is also provided with an anchoring element, which is used to fix the puncture cannula to the vertebra. The anchoring element includes an anchoring needle that slides on the side wall of the puncture cannula, and a third spring is fixedly connected to the anchoring needle. The end of the third spring away from the anchoring needle is fixedly connected to the inner wall of the puncture cannula. A wedge block is also slidably fitted inside the side wall of the puncture cannula. The wedge block is fixedly connected to the pull wire. The side of the anchoring needle near the suspension rod is arc-shaped, and the wedge block contacts the arc shape.

[0034] Beneficial effects: Through the cooperation of the wedge and the arc-shaped anchoring needle, the anchoring needle is pushed outward and inserted into the vertebra when the suture is pulled, so as to achieve stable fixation of the puncture cannula; the third spring provides the reset force, which facilitates postoperative removal; it effectively prevents cannula displacement during the operation, ensures the stability of the suspension and retraction, and improves the safety and efficiency of the operation. Attached Figure Description

[0035] Figure 1 This is an axonometric view of the puncture needle in the spinal endoscopic dural retraction device of the present invention.

[0036] Figure 2 This is an isometric view of the traction structure in the spinal endoscopic dura mater retraction device of the present invention.

[0037] Figure 3 This is an isometric view of the handle in the spinal endoscopic dural retraction device of the present invention.

[0038] Figure 4 For the present invention Figure 3 A frontal sectional view.

[0039] Figure 5 For the present invention Figure 4 Enlarged view of section A.

[0040] Figure 6For the present invention Figure 4 Enlarged view of section B.

[0041] Figure 7 For the present invention Figure 4 Enlarged view of section C.

[0042] The reference numerals in the accompanying drawings of the instruction manual include: 1. Puncture needle; 2. Puncture latch; 3. Spring core; 4. First spring; 5. Core latch; 6. Puncture handle; 7. Core handle; 8. Puncture cannula; 9. Suspension rod; 10. Base; 11. Jaw; 12. Handle; 13. Slide rail; 14. Slider; 15. Locking rod; 16. Second spring; 17. Suction cylinder; 18. Piston plate; 19. Transmission rod; 20. Knob; 21. Adhesive layer; 22. Transmission cylinder; 23. Movable plate; 24. Anchor needle; 25. Third spring; 26. Wedge block. Detailed Implementation

[0043] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0044] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] The following detailed description illustrates the specific implementation method:

[0047] Example 1:

[0048] As attached Figures 1-2As shown: A spinal endoscopic dura mater retraction device includes a puncture component for percutaneous puncture to the vicinity of the dura mater within the spinal canal; the puncture component is provided with a suspension component for extending out of the puncture component and connecting to the cut edge of the dura mater.

[0049] The puncture device is also equipped with an operating component, which is used to adjust the traction force applied to the dura mater by the suspension component; by controlling the operating component, the suspension component is fixed and the dura mater is pulled apart to expose the spinal cord tissue.

[0050] The puncture component is a puncture needle 1, and puncture clips 2 are symmetrically and detachably connected to the outer wall of the puncture needle 1; the bottom of the puncture needle 1 is obliquely pointed. In this embodiment, the outer diameter of the puncture needle 1 is 1.5 mm, the inner diameter is 1.3 mm, and the length is 8.0 cm.

[0051] The suspension component is a tension structure, which includes a spring core 3 threaded into the inner wall of the puncture needle 1. A first spring 4 is fixedly welded to the bottom of the spring core 3. The end of the first spring 4 away from the spring core 3 is pointed, and an inner core buckle 5 can be detachably connected to the outer wall of the spring core 3. In this embodiment, the outer diameter of the spring core 3 is 1.3 mm and the length is 11.0 cm; the length of the first spring 4 is 0.5 cm, the diameter is 0.8 mm, and the spacing is 1.3 mm.

[0052] The operating components are a puncture handle 6 and an inner core handle 7. The puncture handle 6 is integrally formed on the top of the puncture needle 1; the inner core handle 7 is integrally formed on the top of the spring inner core 3.

[0053] The specific implementation process is as follows: Before the operation, the target segment is located according to imaging. Under local or general anesthesia, the patient is placed in a prone position, and routine disinfection and draping are performed. First, the puncture needle 1 of this device is slowly inserted into the target location near the dura mater in the spinal canal under image guidance through the working channel of the spinal endoscope or percutaneous path. The inclined tip at the bottom of the puncture needle 1 helps to accurately penetrate and reduce damage to surrounding tissues; the puncture buckle 2 cooperates with the external structure to limit the puncture depth and prevent excessive needle insertion that could damage the spinal cord.

[0054] Subsequently, a small incision is made in the dura mater. The operator rotates and advances the inner core handle 7, causing the spring core 3 to advance along the threads of the inner wall of the puncture needle 1, so that the tip of the first spring 4 extends out of the puncture needle 1 and is gently anchored to the edge of the incised dura mater. After the first spring 4 hooks onto the edge of the dura mater, the inner core handle 7 is slowly and steadily pulled back. This action is transmitted through the spring core 3, causing the first spring 4 to generate an upward pulling force on the edge of the dura mater, and the dura mater flap begins to be lifted. The magnitude of the pulling force is manually controlled by the force and displacement of pulling back the inner core handle 7, and the force can be adjusted in real time according to the degree of dura mater retraction and the exposure of the spinal cord in the endoscopic field of vision.

[0055] While maintaining the traction position, the puncture needle 1 can be fixed to the patient's body surface or an external support to stabilize the entire device. At this time, the cut dura mater is stably pulled away from the spinal cord surface, fully exposing the lesion area below, and suspended to the side, allowing the underlying spinal cord tissue and lesion (such as a tumor) to be fully exposed. The doctor can then use other instruments to perform subsequent tumor resection and other procedures under endoscopy, freeing their hands. After the surgery, the inner core handle 7 is rotated in the opposite direction to release the traction force, the suspension component is removed, and the puncture needle 1 is withdrawn to complete the operation.

[0056] Example 2:

[0057] As attached Figures 3-7 As shown, the difference from Embodiment 1 is that the puncture component is a puncture cannula 8; the suspension component is a clamp structure, which includes a suspension rod 9 that slides with the inner wall of the puncture cannula 8, and a base 10 is integrally formed at the bottom of the suspension rod 9, with a clamp jaw 11 hinged on the base 10.

[0058] The operating component is a handle 12 that is bolted to the puncture cannula 8; the handle 12 is equipped with a moving mechanism for sliding the suspension rod 9 and a suction mechanism for adsorbing the edge of the dura mater; the moving mechanism is used to drive the suction mechanism to operate synchronously so that the dura mater is adsorbed onto the jaws 11 when the jaws 11 move to the target area.

[0059] Combination Figure 4 and Figure 5 As shown, the moving mechanism includes a slide rail 13 that is screwed to the inner wall of the handle 12. A slider 14 is slidably fitted on the slide rail 13. The slider 14 is screwed to the end of the suspension rod 9 away from the jaw 11. A locking rod 15 is slidably fitted inside the slider 14. A second spring 16 is fixedly bonded to the outer wall of the locking rod 15. The end of the second spring 16 away from the locking rod 15 is fixedly bonded to the inner wall of the slider 14. Several slots are opened on the slide rail 13 to engage with the locking rod 15.

[0060] The slider 14 is also provided with an opening and closing mechanism for driving the jaws 11 to open and close; the inner wall of the jaws 11 is also provided with a bonding mechanism for bonding the edge of the dura mater; the opening and closing mechanism is used to drive the bonding mechanism to operate synchronously, so that the bonding mechanism can bond the edge of the dura mater synchronously when the jaws 11 are closed.

[0061] The suction mechanism includes a suction cylinder 17 fixedly connected to the inner wall of the handle 12 by screws, and a piston plate 18 slidably fitted on the inner wall of the suction cylinder 17; a transmission rod 19 is fixedly bonded to the outer wall of the slider 14, and the end of the transmission rod 19 away from the slider 14 is fixedly bonded to the piston plate 18; a suction tube is connected to the side of the suction cylinder 17 away from the transmission rod 19, and the end of the suction tube away from the suction cylinder 17 is connected to the side of the suspension rod 9 near the jaw 11.

[0062] The opening and closing mechanism includes a knob 20 that is rotatably fitted on the slider 14. A pull wire is fixedly sleeved on the outer wall of the rotating shaft of the knob 20. A torsion spring is sleeved on the hinge shaft between the jaws 11 and the base 10. The end of the pull wire away from the knob 20 is fixedly sleeved on the hinge shaft on the jaws 11.

[0063] Combination Figure 6 As shown, the bonding mechanism includes a bonding layer 21 fixedly bonded to the inner wall of the jaw 11. A transmission cylinder 22 is also fixedly connected to the inner wall of the handle 12 by screws. A movable plate 23 is slidably fitted to the inner wall of the transmission cylinder 22. The movable plate 23 is fixedly bonded to the pull wire. A transmission tube is connected to the side of the transmission cylinder 22 near the bonding layer 21. The end of the transmission tube away from the transmission cylinder 22 is connected to the inside of the bonding layer 21.

[0064] The specific implementation process is as follows: In spinal endoscopic surgery, a working channel is first established through a conventional approach, and the puncture cannula 8 of this device is percutaneously inserted into the spinal canal of the target segment, near the dura mater. The operator holds the handle 12, and the doctor overcomes the elastic force of the second spring 16, pressing the locking lever 15 to disengage it from the locking slot; the doctor pushes the slider 14 forward, and the slider 14 slides along the slide rail 13, driving the suspension rod 9 and the jaw 11 at the end to move towards the target area of ​​the dura mater, so that the jaw 11 reaches the edge area of ​​the already cut dura mater.

[0065] During this process, the transmission rod 19 on the slider 14 synchronously pushes the piston plate 18 inside the suction cylinder 17 forward. According to the design of the suction cylinder 17, the forward movement of the piston plate 18 will generate negative pressure (inhalation) behind it (on the side connected to the suction tube). When the jaws 11 are in place, the negative pressure generated at the suction tube opening (near the jaws 11) will actively suck up the soft edge of the dura mater and adhere it to the inside of the open jaws 11; solving the problem of tissue being difficult to grasp under minimally invasive vision and achieving active capture.

[0066] Meanwhile, by rotating the knob 20 on the slider 14, the pull wire is tightened to pull the hinge shaft on the jaw 11, overcoming the torsion spring force to open the jaw 11; after the edge of the dura mater is adsorbed to the appropriate position of the jaw 11, the pull wire is released, and the jaw 11 is closed by the torsion spring force, thereby clamping the edge of the dura mater that has been adsorbed and positioned. During this process, the pull wire will drive the movable plate 23 to slide in the transmission tube 22, press the fluid medium into the transmission tube and fill the bonding layer 21 on the inner wall of the jaw 11. The movement of the movable plate 23 will press the liquid (such as sterile saline) or gas in the transmission tube into the bonding layer 21 (such as an expandable micro-airbag or sponge) on the inner wall of the jaw 11 through the transmission tube.

[0067] The inflated (or pressurized) adhesive layer 21 forms a soft, tissue-compliant cushion between the jaws 11 and the dura mater; this increases the contact area, converting the clamping force into uniform pressure to reduce the risk of tissue damage from hard contact; and the soft and pressurized adhesive layer 21 also increases friction to prevent tissue from slipping during traction.

[0068] Once the clamping jaws 11 firmly grip and conform to the edge of the dura mater, the slider 14 is pushed in the opposite direction to the desired position. The locking lever 15, under the action of the second spring 16, automatically engages with the corresponding slot in the slide rail 13, locking the suspension rod 9 in position. This stabilizes and retracts the dura mater, exposing the underlying spinal cord or lesion area. The surgeon can then perform endoscopic decompression, resection, or release under a clear view. After the surgery, the entire device is withdrawn, completing the minimally invasive retraction procedure. The entire process is highly interconnected, easy to operate, and improves safety and surgical efficiency.

[0069] Example 3:

[0070] As attached Figure 7 As shown, the difference from Embodiment 2 is that the outer wall of the puncture cannula 8 is also provided with an anchoring element, which is used to fix the puncture cannula 8 to the vertebra. The anchoring element includes an anchoring needle 24 that slides on the side wall of the puncture cannula 8, and a third spring 25 is fixedly bonded to the anchoring needle 24. The end of the third spring 25 away from the anchoring needle 24 is fixedly bonded to the inner wall of the puncture cannula 8. A wedge block 26 is also slidably fitted inside the side wall of the puncture cannula 8. The wedge block 26 is fixedly sleeved with the pull wire. The side of the anchoring needle 24 near the suspension rod 9 is arc-shaped, and the wedge block 26 contacts the arc shape. In some preferred embodiments, the wedge block 26 can also be driven by a separate external force and is provided with a return element so that it can return to its original position after being released.

[0071] The specific implementation process is as follows: After the puncture cannula 8 is percutaneously inserted and reaches the vicinity of the dura mater within the target spinal canal, it needs to be stably anchored to the adjacent vertebra to prevent displacement due to manipulation or traction during the operation. At this time, the operator rotates the knob 20 on the handle 12, which drives the wedge 26 to slide distally along the side wall of the puncture cannula 8 through the pull wire; the wedge 26 contacts the arc-shaped surface on the anchoring needle 24 and gradually pushes the anchoring needle 24 outward along its inclined surface. As the wedge 26 continues to advance, the anchoring needle 24 overcomes the elastic force of the third spring 25 and extends radially from the outer wall of the puncture cannula 8, with its tip piercing into the bone of the adjacent lamina or pedicle, thereby fixing the puncture cannula 8.

[0072] The anchoring action and the opening and closing of the clamping jaw 11 share the same pull line, requiring no additional operating steps and exhibiting high integration. After anchoring, when the suspension component clamps and retracts the dura mater, the position of the puncture cannula 8 remains stable, ensuring accurate traction direction. Before the end of the operation, rotating the knob 20 in the opposite direction causes the pull line to retract under the restoring force of the torsion spring, pulling the wedge block 26 back. The third spring 25 pulls the anchoring needle 24 back into the side wall of the puncture cannula 8, releasing the bony fixation and facilitating the safe withdrawal of the entire device. The entire anchoring, retraction, and release process is smooth and responsive, improving the stability and safety of endoscopic dura mater procedures.

[0073] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A spinal endoscopic dural retraction device, comprising a puncture component, characterized in that, The puncture component is used for percutaneous puncture to the vicinity of the dura mater within the spinal canal; the puncture component is equipped with a suspension component, which is used to extend the puncture component and connect to the cut edge of the dura mater; The puncture device is also equipped with an operating component, which is used to adjust the traction force applied to the dura mater by the suspension component; by controlling the operating component, the suspension component is fixed and the dura mater is pulled apart to expose the spinal cord tissue.

2. The spinal endoscopic dura mater retraction device according to claim 1, characterized in that, The puncture component is a puncture needle (1), and the outer wall of the puncture needle (1) is symmetrically and detachably connected with puncture buckles (2); the bottom of the puncture needle (1) is slanted and sharp.

3. The spinal endoscopic dural retraction device according to claim 2, characterized in that, The suspension component is a traction structure, which includes a spring core (3) threaded into the inner wall of the puncture needle (1), and a first spring (4) fixedly connected to the bottom of the spring core (3); the end of the first spring (4) away from the spring core (3) is sharp, and the outer wall of the spring core (3) can also be detachably connected to a core buckle (5).

4. The spinal endoscopic dural retraction device according to claim 3, characterized in that, The operating components are a puncture handle (6) and an inner core handle (7). The puncture handle (6) is fixedly connected to the top of the puncture needle (1); the inner core handle (7) is fixedly connected to the top of the spring inner core (3).

5. The spinal endoscopic dural retraction device according to claim 4, characterized in that, The puncture component is a puncture cannula (8); the suspension component is a clamp structure, which includes a suspension rod (9) that slides with the inner wall of the puncture cannula (8), and a base (10) is fixedly connected to the bottom of the suspension rod (9), and a jaw (11) is hinged on the base (10). The operating component is a handle (12) that is fixedly connected to the puncture cannula (8); the handle (12) is provided with a moving mechanism for sliding the suspension rod (9) and a suction mechanism for adsorbing the edge of the dura mater; the moving mechanism is used to drive the suction mechanism to operate synchronously so that the dura mater is adsorbed onto the jaws (11) when the jaws (11) move to the target area.

6. The spinal endoscopic dural retraction device according to claim 5, characterized in that, The moving mechanism includes a slide rail (13) fixedly connected to the inner wall of the handle (12), a slider (14) slidably fitted on the slide rail (13), the slider (14) being fixedly connected to the end of the suspension rod (9) away from the jaws (11); a locking rod (15) slidably fitted inside the slider (14), a second spring (16) being fixedly connected to the outer wall of the locking rod (15), the end of the second spring (16) away from the locking rod (15) being fixedly connected to the inner wall of the slider (14); and several slots for engaging with the locking rod (15) are opened on the slide rail (13). The slider (14) is also provided with an opening and closing mechanism for driving the jaws (11) to open and close; the inner wall of the jaws (11) is also provided with a bonding mechanism for bonding the edge of the dura mater; the opening and closing mechanism is used to drive the bonding mechanism to run synchronously so that the bonding mechanism can bond the edge of the dura mater synchronously when the jaws (11) are closed.

7. The spinal endoscopic dural retraction device according to claim 6, characterized in that, The suction mechanism includes a suction cylinder (17) fixedly connected to the inner wall of the handle (12), and a piston plate (18) slidingly fitted on the inner wall of the suction cylinder (17); a transmission rod (19) is fixedly connected to the outer wall of the slider (14), and the end of the transmission rod (19) away from the slider (14) is fixedly connected to the piston plate (18); a suction tube is connected to the side of the suction cylinder (17) away from the transmission rod (19), and the end of the suction tube away from the suction cylinder (17) is connected to the side of the suspension rod (9) near the jaw (11).

8. The spinal endoscopic dural retraction device according to claim 7, characterized in that, The opening and closing mechanism includes a knob (20) that is rotatably fitted on the slider (14). A pull wire is fixedly connected to the outer wall of the rotating shaft of the knob (20). A torsion spring is sleeved on the hinge shaft between the jaw (11) and the base (10). The end of the pull wire away from the knob (20) is fixedly connected to the hinge shaft on the jaw (11).

9. The spinal endoscopic dural retraction device according to claim 8, characterized in that, The bonding mechanism includes a bonding layer (21) fixedly connected to the inner wall of the jaw (11), and a transmission tube (22) fixedly connected to the inner wall of the handle (12). A movable plate (23) is slidably fitted to the inner wall of the transmission tube (22). The movable plate (23) is fixedly connected to the pull wire. A transmission tube is connected to the side of the transmission tube (22) near the bonding layer (21), and the end of the transmission tube away from the transmission tube (22) is connected to the inside of the bonding layer (21).

10. The spinal endoscopic dural retraction device according to claim 9, characterized in that, The outer wall of the puncture cannula (8) is also provided with an anchoring element, which is used to fix the puncture cannula (8) to the vertebra. The anchoring element includes an anchoring needle (24) that slides on the side wall of the puncture cannula (8). A third spring (25) is fixedly connected to the anchoring needle (24). The end of the third spring (25) away from the anchoring needle (24) is fixedly connected to the inner wall of the puncture cannula (8). A wedge (26) also slides on the side wall of the puncture cannula (8). The wedge (26) is fixedly connected to the pull line. The side of the anchoring needle (24) near the suspension rod (9) is arc-shaped, and the wedge (26) contacts the arc.

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