A minimally invasive bone cement device for anterior and posterior thoracolumbar fracture and method of use

Abstract

The application discloses a kind of for thoracolumbar fracture front and rear road's minimally invasive bone cement device and use method, and the application belongs to medical equipment technical field, comprising: puncture guiding mechanism, bone cement mechanism, including passage dilator, the passage dilator is detachably installed with the sheet mechanism in, the bottom of sheet body is arc structure;Bone cement injection mechanism.The application solves the risk of bone cement leakage by setting bone cement bag, and then reduces the risk of bone cement leakage to the spinal canal or paravertebral tissue, so as to avoid nerve damage, pulmonary embolism and other serious complications.The specific shape can be formed in the fractured vertebral body by the setting of the sheet mechanism, the uniform distribution of bone cement in the vertebral body is ensured by introducing bone cement distribution control mechanism, the stability of fractured vertebral body is enhanced, and the treatment effect is improved.Meanwhile, the effective recovery of the height of severely compressed fractured vertebral body is realized, and the postoperative physiological curvature and function of the patient's spine are improved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to a minimally invasive bone cement device and its usage method for anterior and posterior approaches to thoracic and lumbar vertebral fractures. Background Technology

[0002] Thoracolumbar compression fractures (TLCF) are common spinal injuries, with a particularly high incidence in elderly patients with osteoporosis.

[0003] Traditional treatment methods include conservative treatment (such as bed rest and bracing) and open surgery (such as anterior or posterior vertebroplasty). However, conservative treatment is time-consuming and results in poor quality of life for patients, while open surgery is more invasive, has more complications, and a longer recovery time.

[0004] In recent years, minimally invasive surgical techniques have gradually become the mainstream method for treating compression fractures of the thoracolumbar vertebrae, especially percutaneous vertebroplasty (PVP) and percutaneous kyphoplasty (PKP). These techniques stabilize fractures and relieve pain by injecting bone cement (such as polymethyl methacrylate, PMMA) into the fractured vertebral body. However, existing minimally invasive bone cement systems still have the following problems:

[0005] High risk of bone cement leakage: Current technology lacks an effective mechanism for controlling bone cement flow, resulting in a high risk of leakage.

[0006] The procedure is complex: the existing system requires multiple adjustments to injection parameters during bone cement injection, which increases the operation time and difficulty.

[0007] Uneven distribution of bone cement: Current technology makes it difficult to achieve uniform distribution of bone cement within the vertebral body, affecting treatment outcomes.

[0008] Insufficient vertebral height recovery: Current technology has limited ability to restore vertebral height, especially for severe compression fractures, where postoperative vertebral height recovery is not ideal.

[0009] There is an urgent need to develop a minimally invasive bone cement device and its application method for anterior and posterior approaches to thoracic and lumbar vertebral fractures in order to solve the aforementioned technical problems. Summary of the Invention

[0010] The purpose of this invention is to provide a minimally invasive bone cement device and method of use for anterior and posterior approaches to thoracolumbar vertebral fractures, addressing the aforementioned problems. The minimally invasive bone cement device disclosed in this application solves the risk of bone cement leakage by setting up a bone cement sac, thereby reducing the risk of bone cement leakage into the spinal canal or paravertebral tissues, and thus avoiding serious complications such as nerve damage and pulmonary embolism. The device utilizes a prying mechanism to form a specific shape within the fractured vertebra, and by introducing a bone cement distribution control mechanism, ensures uniform distribution of bone cement within the vertebra, enhancing the stability of the fractured vertebra and improving treatment efficacy. Simultaneously, it effectively restores the height of severely compression fractured vertebrae, improving the postoperative physiological curvature and function of the spine. By integrating the above-mentioned technological advantages, a safe, efficient, and minimally invasive treatment plan is provided, reducing postoperative complications, shortening patient recovery time, and improving quality of life. This invention aims to provide patients with thoracolumbar vertebral compression fractures with a safer, more precise, and more efficient minimally invasive treatment method, overcoming the shortcomings of existing technologies and promoting the further development of minimally invasive spinal surgery techniques.

[0011] To achieve the above objectives, the present invention provides the following solution: The present invention discloses a minimally invasive bone cement device for anterior and posterior approaches to thoracolumbar vertebral fractures, comprising:

[0012] The puncture guide mechanism, under the guidance of a real-time image navigation system, can accurately locate the fractured vertebra and plan the puncture path during puncture.

[0013] A bone cement device includes a channel dilator with a detachably mounted paddle mechanism. The paddle mechanism includes a paddle controller that is inserted into the channel dilator. A rod is fixedly connected below the paddle controller, and a paddle body is fixedly connected below the rod. A locking block I is fixedly connected to the rod, and a locking block II is fixedly mounted on the inner wall of the channel dilator. During puncture, the rod penetrates the locking block II. An elastic element is fixedly installed between the locking block I and the locking block II. In minimally invasive procedures, pressing the paddle controller forces the paddle body through the channel dilator until it reaches the fractured vertebra. The paddle controller is then inserted into the channel dilator, and rotating the paddle body causes a specific shape to form within the fractured vertebra. The bottom of the paddle body has an arc-shaped structure.

[0014] The bone cement injection mechanism includes a high-pressure bone cement injector interface, a high-pressure bone cement injector tube, and a bone cement sac. The high-pressure bone cement injector interface and the high-pressure bone cement injector tube have several branch tubes outside the tube. The bone cement sac is fitted onto the branch tubes. After bone cement is injected, the bone cement sac detaches from the branch tubes, and the bone cement sac forms a unique shape that conforms to the fractured vertebral body.

[0015] Preferably, the paddle controller is a T-shaped thin sheet, wherein the width of the paddle controller inside the channel expander is smaller than the width outside the channel expander.

[0016] Preferably, the channel expander has a through groove, and during minimally invasive surgery, the narrower side of the paddle controller moves along the through groove;

[0017] The channel expander has several slots, and the slots are located on both sides of the through slot. During minimally invasive surgery, when the paddle body reaches the designated position, the wider side of the paddle controller is inserted into one of the slots.

[0018] Preferably, the paddle body is a block formed by a quarter-circular structure.

[0019] Preferably, the channel expander includes a channel body and an end piece mounted thereon.

[0020] Preferably, the elastic element is a spring.

[0021] Preferably, the puncture guiding mechanism is a puncture guide.

[0022] Preferably, the paddle body has a semi-elliptical structure.

[0023] To achieve the above objectives, the present invention also provides the following solution: The present invention also discloses a method for using a minimally invasive bone cement device for anterior and posterior approaches to thoracic and lumbar vertebral fractures, the specific steps of which are as follows:

[0024] The puncture guide mechanism is implanted in the fractured vertebral body: the target fractured vertebral body is located by fluoroscopic positioning through a real-time image navigation system, and the puncture guide mechanism is brought to the fractured vertebral body through the pedicle or the side of the vertebral body.

[0025] Implanting the bone cement mechanism: After the channel expander passes through the puncture guide mechanism, continue to puncture forward, press the prying mechanism until it reaches the fractured vertebral body, insert the prying mechanism onto the channel expander, rotate the channel expander 360° to form a specific shape in the fractured vertebral body, release the prying mechanism, and pull out the channel expander.

[0026] Bone cement injection: The high-pressure bone cement injector tube is inserted through the puncture guide mechanism. Once reached, the bone cement sac is implanted, and bone cement is injected through the high-pressure bone cement injector interface. After completion, the above devices are removed in sequence to complete the minimally invasive surgery.

[0027] Compared with the prior art, the present invention has the following advantages and technical effects:

[0028] 1. By setting up a bone cement sac, the risk of bone cement leakage is resolved, effectively avoiding the risk of bone cement leaking into the spinal canal or paravertebral tissues, and avoiding serious complications such as nerve damage and pulmonary embolism.

[0029] 2. Through the structural design of the pick, based on the unique shape formed within the fractured vertebral body, it ensures the uniform distribution of bone cement within the vertebral body, enhances the stability of the fractured vertebral body, improves treatment efficacy, and solves the problem of bone cement loosening; it also improves surgical safety and efficacy. Through uniform distribution and vertebral body repositioning techniques, it provides a safe, efficient, and minimally invasive treatment plan, reduces postoperative complications, shortens patient recovery time, and improves quality of life.

[0030] 3. The combination of bone cement structure and bone cement sac can effectively restore the vertebral height of severe compression fractures and improve the physiological curvature and function of the spine after surgery.

[0031] 4. Wide range of applications: The minimally invasive bone cement device disclosed in this invention is applicable to both anterior and posterior surgical approaches and can treat various types of compression fractures of the thoracic and lumbar vertebrae, including osteoporotic fractures and traumatic fractures. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the minimally invasive bone cement device in this invention;

[0034] Figure 2 for Figure 1 Another perspective structural diagram;

[0035] Figure 3 A schematic diagram of the structure of the paddle controller and the channel expander in operation;

[0036] Figure 4 This is a schematic diagram of the bone cement mechanism in this invention;

[0037] Figure 5 This is a schematic diagram of the connection between the lever and the paddle controller in this invention;

[0038] Figure 6 This is a schematic diagram of the connection between the elastic element, the rod, and the paddle body in this invention;

[0039] Figure 7 A schematic diagram of the structure for the cooperation between the paddle mechanism and the channel expander;

[0040] Figure 8 A schematic diagram of the bone cement injection mechanism;

[0041] Figure 9 This is a schematic diagram of the structure of the paddle body in Example 2;

[0042] Figure 10 for Figure 9 Schematic diagrams of different distribution patterns of the center paddle body;

[0043] Figure 11 This is a schematic diagram of the structure of the paddle body in Example 3;

[0044] Figure 12 for Figure 11 Schematic diagrams of different distribution patterns of the center paddle body;

[0045] Figure 13 This is a schematic diagram of the branched short pipe structure;

[0046] Among them, 1. Puncture guide mechanism; 11. Puncture guide; 2. Bone cement mechanism; 21. Channel dilator; 211. Through groove; 212. Slot; 213. Channel body; 214. End; 22. Paddle mechanism; 221. Paddle controller; 2211. Protruding section; 2212. Recessed section; 2213. Arc-shaped section; 222. Rod body; 223. Elastic element; 224. Paddle body; 225. Slot I; 226. Slot II; 3. Bone cement injection mechanism; 31. Bone cement sac; 32. Bone cement high-pressure injector interface; 33. Bone cement high-pressure injector tube body; 34. Branch short tube. Detailed Implementation

[0047] 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.

[0048] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] Example 1

[0050] like Figures 1-8 and Figure 13 As shown, this invention discloses a minimally invasive bone cement device for anterior and posterior approaches to thoracolumbar vertebral fractures, comprising:

[0051] The puncture guide mechanism 1, during puncture, can accurately locate the fractured vertebral body and plan the puncture path under the real-time image navigation system;

[0052] The bone cement mechanism 2 includes a channel dilator 21, within which a pry mechanism 22 is detachably installed. The pry mechanism 22 includes a pry controller 221 that is inserted into the channel dilator 21. A rod 222 is fixedly connected below the pry controller 221, and a pry body 224 is fixedly connected below the rod 222. A locking block I 225 is fixedly connected to the rod 222, and a locking block II 226 is fixedly installed on the inner wall of the channel dilator 21. During puncture, the rod 225... 22 penetrates the locking block II 226, and an elastic element 223 is fixedly installed between the locking block I 225 and the locking block II 226; wherein, during minimally invasive surgery, pressing the paddle controller 221 causes the paddle body 224 to penetrate the channel dilator 21 until it reaches the fractured vertebral body, the paddle controller 221 is inserted into the channel dilator 21, and the channel dilator 21 and the paddle body 224 are rotated to form a unique shape within the fractured vertebral body; the bottom of the paddle body 224 has an arc-shaped structure;

[0053] The bone cement injection mechanism 3 includes a high-pressure bone cement injector interface 32, a high-pressure bone cement injector body 33, and a bone cement sac 31. The high-pressure bone cement injector interface 32 and the high-pressure bone cement injector body 33 are integrally formed. Several branch tubes 34 are provided outside the high-pressure bone cement injector body 33. The bone cement sac 31 is sleeved on the branch tubes 34. After bone cement is injected, the bone cement sac 31 detaches from the branch tubes 34, and the bone cement sac 31 forms a unique shape consistent with the fractured vertebral body.

[0054] Specifically, such as Figures 3 to 8 and Figure 13As shown, the bone cement material used is modified polymethyl methacrylate (PMMA) bone cement, which has suitable setting time, fluidity, and biocompatibility. To facilitate faster and more convenient shaping within the fractured vertebral body, the prying mechanism 22 is detachably installed within the channel expander 21. When the prying body 224 is needed to cut tissue of a specific shape within the fractured vertebral body, pressing the prying controller 221 causes the rod 222 to move downwards, passing through the locking block II 226 and moving downwards until the prying body 224 protrudes outside the channel expander 21. At this point, the elastic element 223 is compressed. Once the designated position is reached, the prying controller 221 is engaged with the channel expander 21, allowing the channel expander to be opened. Rotate 21 360 degrees to cut the fractured vertebral body tissue into a specific shape. After cutting, push the paddle controller 221 to make it disengage from the channel dilator 21. At this time, the elastic element 223 is released and pops out, which will drive the paddle body 224 to retract. The channel dilator 21 can be pulled out as a whole. Then, the bone cement bag 31 is put on the branch tube 34. The bone cement high pressure injector tube 33 is inserted along the puncture guide mechanism 1, and the bone cement bag 31 is implanted into the fractured vertebral body. Bone cement is injected through the bone cement high pressure injector interface 32. After the bone cement injection is completed, the devices can be pulled out one by one. Because it forms a specific shape within the fractured vertebral body, the injected bone cement flows more evenly. Existing techniques involve direct injection, which allows for random flow and uneven distribution. Even distribution ensures the density of the hardened bone cement, solves the problem of loosening, enhances the stability of the fractured vertebral body, and improves treatment outcomes. Furthermore, the presence of the bone cement pocket 31 effectively prevents leakage of bone cement into the spinal canal or paravertebral tissues, avoiding serious complications such as nerve damage and pulmonary embolism. Moreover, the combination of the bone cement structure 2 and the bone cement pocket 31 effectively restores the vertebral height in severe compression fractures, improving the patient's postoperative spinal curvature and function. This improves surgical safety and efficacy, providing a safe, efficient, and minimally invasive treatment plan through even distribution and vertebral repositioning techniques, reducing postoperative complications, shortening patient recovery time, and improving quality of life. In addition, it has a wide range of applications. This invention is applicable to both anterior and posterior surgical approaches and can treat various types of compression fractures of the thoracic and lumbar vertebrae, including osteoporotic fractures and traumatic fractures. The number and arrangement of the branch tubes 34 can be set according to the number and arrangement of the bone cement sacs 31. If there are any excess branch tubes 34, they can be plugged in advance with rubber plugs.

[0055] In a further optimized design, the paddle controller 221 is a T-shaped thin sheet, wherein the width of the paddle controller 221 inside the channel expander 21 is smaller than the width outside the channel expander 21.

[0056] In a further optimized design, a through groove 211 is provided on the channel expander 21. During minimally invasive surgery, the narrower side of the paddle controller 221 moves along the through groove 211.

[0057] The channel expander 21 has several slots 212, and the slots 212 are located on both sides of the through slot 211. During minimally invasive surgery, when the paddle body 224 reaches the designated position, the wider side of the paddle controller 221 is inserted into one of the slots 212.

[0058] Specifically, such as Figure 3 and Figure 5 As shown, in order to ensure that the paddle mechanism 22 and the channel expander 21 can be smoothly engaged, the paddle controller 221 is designed as a T-shaped thin plate. When the position needs to be moved, the narrower part can be moved in the through slot 211. When it is moved to the designated position, the wider part can be pushed inward to the channel expander 21, so that it is engaged in the slot 212. In this way, the paddle mechanism 22 can be engaged in the channel expander 21.

[0059] In a further optimized design, the paddle body 224 is a block formed by a quarter-circular structure.

[0060] Specifically, such as Figure 6 As shown, the part of the pry bar body 224 away from the rod body 222 is pointed, while the bottom is rounded. This ensures smooth cutting and creates a semi-circular structure. When bone cement is injected, the cement moves to both sides of the rounded structure, making the injected bone cement more uniform. During the flow, the bone cement gradually hardens and forms a certain shape, enhancing the stability of the fractured vertebra and improving the treatment effect. The pry bar body 224 can be located on one side of the rod body 222 or distributed on both sides. When distributed on both sides, it can be evenly distributed or staggered.

[0061] In a further optimized design, the channel expander 21 includes a channel body 213 and an end cap 214 mounted thereon.

[0062] Specifically, such as Figure 1 As shown, the end 214 can be a spherical structure, a square structure, or a columnar structure. The end 214 can be integrally formed with the channel body 213. For easy disassembly, it can also be designed as a snap-fit ​​installation, just like the installation of a pen and a pen cap.

[0063] In a further optimized design, the elastic element 223 is preferably a spring.

[0064] In a further optimized design, the puncture guide mechanism 1 is a puncture guide 11.

[0065] To address the above technical problems, this invention also discloses a method for using a minimally invasive bone cement device for anterior and posterior approaches to thoracolumbar vertebral fractures, the specific steps of which are as follows:

[0066] The puncture guide mechanism 1 is implanted into the fractured vertebral body: the target fractured vertebral body is located by fluoroscopic positioning through a real-time image navigation system, and the puncture guide mechanism 1 is brought to the fractured vertebral body through the pedicle or the side of the vertebral body.

[0067] Implanting the bone cement mechanism 2: After the channel expander 21 passes through the puncture guide mechanism 1, continue to puncture forward, press the prying mechanism 22 until it reaches the fractured vertebral body, insert the prying mechanism 22 onto the channel expander 21, rotate the channel expander 21 360° to form a unique shape in the fractured vertebral body, release the prying mechanism 22, and pull out the channel expander 21;

[0068] Bone cement injection: The high-pressure bone cement injector tube 33 is inserted through the puncture guide mechanism 1, and the bone cement sac 31 is implanted after reaching it. Bone cement is injected through the high-pressure bone cement injector interface 32. After completion, the above devices are pulled out in sequence to complete the minimally invasive surgery.

[0069] Example 2

[0070] like Figures 9-10 As shown, the only difference from Embodiment 1 is that the paddle body 224 has a semi-elliptical structure.

[0071] Specifically, such as Figure 9 and Figure 10 As shown, the final shape is an elliptical structure, essentially an arc-shaped structure at both the top and bottom. When bone cement is injected, the arc-shaped structure results in a slower flow rate and more even distribution of the cement, better ensuring the later surgical outcome and enhancing the strength of the fractured vertebra. Furthermore, as... Figure 10 As shown, its distribution can be located on one side of the rod 222 or on both sides. It can be symmetrically distributed or staggered. A symmetrical distribution can achieve a specific shape faster during the cutting process, while staggered and one-sided distribution require a 360-degree rotation to complete.

[0072] Example 3

[0073] like Figures 11-12 As shown, the only difference from Embodiment 1 is that the outer contour of the paddle body 224 is composed of a protruding section 2211, a recessed section 2212, a protruding section 2211 and an arc-shaped section 2213, wherein the arc-shaped section 2213 is located below the protruding section 2211 and the recessed section 2212.

[0074] Specifically, such as Figure 11 and Figure 12 As shown, this shape result allows the injected bone cement to flow more slowly and be distributed more evenly. Similarly, its distribution can be located on one side of the rod 222 or on both sides. It can be symmetrically distributed or staggered. Symmetrical distribution can achieve a specific shape faster during the cutting process, while staggered and one-sided distribution require a 360-degree rotation to complete.

[0075] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 this invention, and are not intended to 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 this invention.

[0076] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A minimally invasive bone cement device for anterior and posterior approaches to thoracolumbar vertebral fractures, characterized in that: include: The puncture guide mechanism (1) can accurately locate the fractured vertebra and plan the puncture path under the real-time image navigation system during puncture. The bone cement mechanism (2) includes a channel dilator (21), within which a paddle mechanism (22) is detachably installed. The paddle mechanism (22) includes a paddle controller (221) that is inserted into the channel dilator (21). A rod (222) is fixedly connected below the paddle controller (221), and a paddle body (224) is fixedly connected below the rod (222). A locking block I (225) is fixedly connected to the rod (222), and a locking block II (226) is fixedly installed on the inner wall of the channel dilator (21). During puncture, the rod... The body (222) penetrates the card block II (226), and an elastic element (223) is fixedly installed between the card block I (225) and the card block II (226); wherein, during minimally invasive surgery, the paddle controller (221) is pressed to push the paddle body (224) through the body of the channel dilator (21) until it reaches the fractured vertebral body, the paddle controller (221) is inserted into the channel dilator (21), and the channel dilator (21) is rotated so that the paddle body (224) forms a unique shape within the fractured vertebral body; the bottom of the paddle body (224) has an arc-shaped structure; The bone cement injection mechanism (3) includes a high-pressure bone cement injector interface (32), a high-pressure bone cement injector tube (33), and a bone cement sac (31). The high-pressure bone cement injector interface (32) and the high-pressure bone cement injector tube (33) are integrally formed. Several branch tubes (34) are provided outside the high-pressure bone cement injector tube (33). The bone cement sac (31) is sleeved on the branch tubes (34). After bone cement is injected, the bone cement sac (31) detaches from the branch tubes (34), and the bone cement sac (31) forms a unique shape consistent with the fractured vertebral body. The paddle controller (221) is a T-shaped thin sheet, wherein the width of the paddle controller (221) inside the channel expander (21) is smaller than the width outside the channel expander (21); A through groove (211) is provided on the channel expander (21). During minimally invasive surgery, the side of the paddle controller (221) with the smaller width moves along the through groove (211). The channel expander (21) has several slots (212) and the slots (212) are located on both sides of the through slot (211). During minimally invasive surgery, when the paddle body (224) reaches the designated position, the wider side of the paddle controller (221) is inserted into one of the slots (212).

2. The minimally invasive bone cement device for anterior and posterior approaches to thoracolumbar vertebral fractures according to claim 1, characterized in that: The paddle body (224) is a block formed by a quarter-circular structure.

3. The minimally invasive bone cement device for anterior and posterior approaches to thoracolumbar vertebral fractures according to claim 1, characterized in that: The channel expander (21) includes a channel body (213) and an end (214) mounted thereon.

4. The minimally invasive bone cement device for anterior and posterior approaches to thoracolumbar vertebral fractures according to claim 1, characterized in that: The elastic element (223) is a spring.

5. The minimally invasive bone cement device for anterior and posterior approaches to thoracolumbar vertebral fractures according to claim 1, characterized in that: The puncture guide mechanism (1) is a puncture guide (11).

6. The minimally invasive bone cement device for anterior and posterior approaches to thoracolumbar vertebral fractures according to claim 1, characterized in that: The paddle body (224) has a semi-elliptical structure.

7. A method of using the minimally invasive bone cement device for anterior and posterior approaches to thoracolumbar vertebral fractures as described in claim 1, characterized in that: The specific steps are as follows: The puncture guide mechanism (1) is implanted in the fractured vertebral body: the target fractured vertebral body is located by fluoroscopic positioning through a real-time image navigation system, and the puncture guide mechanism (1) is brought to the fractured vertebral body through the pedicle or the side of the vertebral body. Implanting the bone cement mechanism (2): After the channel dilator (21) passes through the puncture guide mechanism (1), continue to puncture forward, press the prying mechanism (22) until it reaches the fractured vertebral body, insert the prying mechanism (22) onto the channel dilator (21), rotate the channel dilator (21) 360° to form a special shape in the fractured vertebral body, release the prying mechanism (22), and pull out the channel dilator (21); Injecting bone cement: Insert the high-pressure bone cement injector tube (33) along the puncture guide mechanism (1), and after reaching it, implant the bone cement sac (31). Inject bone cement through the high-pressure bone cement injector interface (32). After completion, pull out the above devices in sequence to complete the minimally invasive surgery.

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